multiroll mill stands

Cold Rolling Mills

SMS group

FLAT-PRODUCT MILLS

MULTIROLL MILL STANDSfor stainless-steel strip

STAINLESS STEEL,a multipurpose material

Cold Rolling MillsSMS group

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FROM ARCHITECTURE AND

HOUSEHOLD APPLIANCES

TO VEHICLE CONSTRUCTION

Stainless steel is a premium material for a wide range of applications. Whereverthere is a need for corrosion-resistance,aesthetics, and durability, stainless steelis the first choice. Also significant is itsunlimited recyclability which notably helpsprotect our environment.

Architecture and façades

Beautiful and resistant to environmentalimpacts –stainless steel provides buildingprotection in perfection.

Chemicals and petrochemicals

Resistant to corrosion, acid, and heat aswell as extremely strong – stainless steelis ideally suited for the processes in thechemical and petrochemical industry.

Medical instruments

and the food industry

Hygienic, clean, and robust – stainlesssteel meets indispensable requirementsfor applications in medicine and the foodindustry.

Household appliances

Ultra-polished or brushed matt finish, simple elegance combined with excellentformability – stainless steel is a fascinat-ing material that brightens up even dailyroutines like cooking, doing the laundry,and washing the dishes.

Vehicle construction

High-strength, lightweight, energy-absorb -ing, and resource-saving – stainless steelcomes with the ideal properties for auto-motive and vehicle construction.

Offshore technology

and shipbuilding

Aggressive seawater, wind, and weather– the kind of environment where corro-sion-resistant and robust duplex steelsexcel.

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Stainless steel – versatility at its best.

INTRODUCTION

Stainless steel,a multipurpose material 2

Top technologyfor top products 4

SPLITBLOCK STANDS

HYSCO 6

Chia Far 8

YUSCO 10

LISCO 12

VDM Metals 14

YUSCO 16

Outokumpu 18

POSCO 20

Outokumpu NIROSTA 22

MONOBLOCK STANDS

NAS 26

Bahru Stainless 28

BENXI 30

BSSB 32

ZJYTSS 34

Acciai Speciali Terni 36

ZJYTSS 38

LISCO 40

TISCO 42

ZJYTSS 44

SKS 46

Acciai Speciali Terni 48

18-HIGH STANDS

TISCO 50

POSCO 52

YUSCO 54

TOP TECHNOLOGYfor top products


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EXPERTISE IN PLANT

TECHNOLOGY

FOR STAINLESS STEEL

SMS group ranks among the leading sup-pliers of plant technology and equipmentfor the production of high-quality stainless-steel strip. Operating on a global scale,we have already supplied more than 100cold-rolling mills for stainless, silicon, andstandard steels. Yet also included in theSMS group portfolio are annealing andpickling lines for cold and hot strip, bright-annealing lines, skin-pass mills aswell as preparation and finishing lines.Plus, in recent years, we have continu-ously expanded our Electrics and Automa-tion as well as Service Divisions. That’swhy SMS group is in a position to offer its worldwide customer base the fullrange of plant technology and equipmentfor producing high-quality stainless-steelproducts.

MONOBLOCK, SPLITBLOCK

AND 18-HIGH COLD ROLLING

MILLS

To enable our customers to produce stain-less-steel cold strip, SMS group suppliespowerful 20-high rolling mills as stand-alone systems operating in reversingmode. They come in two versions: theclosed, robust MonoBlock design or themore flexible SplitBlock type. Both typesof roll stand achieve minimum thicknessesdown to 0.1 mm at rolling speeds of up to 1,000 m/min and maximum thicknessreductions of up to 90%. Also available is the option to choose our 18-HS standswith 18-HS roll sets. They are particularlysuited for integration and use in continu-ous production facilities.

Fully automated high-speed roll changing and ultra-dynamiccontrol systems are a must for the implementation of a contin-uous production process. Using several stands in tandemarrangement forms the basis for a high-performance plant con-cept designed to produce premium-quality stainless-steel stripcost-effectively.

Moreover, the complete design of our 18-HS roll sets makes itpossible to revamp existing four-high or six-high stands. Thatcuts investment costs compared to new plants.

Specifically for rolling a very wide product range coveringeverything from soft IF grades to high-strength steel includingstainless steels, SMS has developed the CVC® plus M 18/4.This multi-function stand type can also be retrofitted into exist-ing stands. An extra advantage are the rapid and easy-changeroll set packages in CVC® plus four-high and 18-HS design. One problem steelmakers face is that it’s barely possible tomake a profit when producing small batches on specializedrolling mills. Our solution means manufacturers can expandtheir product ranges at low investment costs.

EXPLANATION OF TYPE DESIGNATION

Example: SB22-52”: SB = SplitBlock; 22 = size identificationcode; 52” = rollable width in inches

18-high stand.

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HYSCO,SB 22 - 52“, mills No. 1 + 2Chia Far Industrial FactorySB 22 - 54“, mill No. 2Yieh United Steel,SB 22 - 52“, mill No. 2Lianzhong Stainless Steel,SB 22 - 52“, mill No. 1VDM Metals GmbH,SB 33 - 30“Yieh United Steel,SB 22 - 52“, mill No. 1Outokumpu, SB 21 - 64“Posco, SB 21 - 52“Outokumpu Nirosta Krefeld,SB 21 - 53“

MONOBLOCK STANDS

Shanxi Taigang Stainless Steel,18-HS ZR 615 A - 64", 5-Stand WRAP LinePOSCO,18-HS ZR 613 A - 52", 4-Stand CTCM LineYieh United Steel,18-HS ZR 613 A - 52", mill No. 5

SPLITBLOCK STANDS 18-HIGH STANDS

NAS (Acerinox Group),MB 22 B - 54“, mill No. 6Bahru Stainless (Acerinox Group),MB 22 B - 52“, mill No. 2Benxi Steel Group,MB 22 B - 54“, mills No. 1 + 2BSSB (Bao Steel),MB 22 B - 52“, mill No. 2ZJYTSS Zhejiang Yuantong StainlessSteel, MB 22 B - 54“, mills No. 3 + 4Acciai Speciali Terni, MB 22 B - 54“,mill No. 7ZJYTSS Zhejiang Yuantong StainlessSteel, MB 22 B - 54“, mill No. 2Lianzhong Stainless Steel,MB 21 BB - 63“, mill No. 2Shanxi Taigang Stainless Steel, MB 22 B - 52“, mill No. 4 bis 8ZJYTSS Zhejiang Yuantong StainlessSteel, MB 22 B - 54“, mill No. 1Shanghai Krupp Stainless, MB 22 B - 53“Acciai Speciali Terni, MB 21 BB - 62“,mill No. 6 Overview of mills supplied.

SplitBlock design. MonoBlock design.

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SplitBlock StandsSMS group

HANYANG STAINLESS STEELCOMPANY (HYSCO), China

Two 20-high cold rolling mills

We supplied these two plants to our Chi-nese customer HanYang Stainless SteelCompany (HYSCO) near the capital cityof Guangdong Province, Guangzhou, for-merly known as Canton. HYSCO is a sub-sidiary of Yieh United Steel Co. (YUSCO).In recent years SMS group delivered asmany as five multiroll cold rolling millsdestined for the parent company and itssubsidiaries.

The two new rolling mills cold-roll stain-less-steel hot strip of series AISI 200,300 and 400 with top-quality strip sur-faces. Built in the proven SplitBlockdesign and SB 22 - 52” size, they areideal for strip widths of 800 to 1,300 mmand a maximum entry thickness of 6.0mm. The total drive power is 12,900 kW,with a maximum rolling force of 8,000kN. Each of the stands comes with acapacity of some 80,000 tpy.

We manufactured and pre-assembled the 20-high cold rolling mill stands in ourworkshop in Hilchenbach.

This pre-assembly as well as extensivefunctional testing in our production shopguaranteed hitch-free installation andcommissioning for a fast start of produc-tion by our Chinese customer.

Included in the scope of supply is ourtried-and-tested SUPAFINE® filter systemfor cooling and ultrafine filtering of therolling oil. What makes our SUPAFINE®

filter systems stand out is their top clean-ing performance at low operational costs.They do not require any filter aids, plusthey generate little waste, while oil con-sumption is low. The system is fullyautomated for maximum operationalsafety.

SplitBlock stand.

SPLITBLOCK STANDS

Main control pulpit with processcontrol system.

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Upper and lower roll sets.

TWO 20-HIGH MILL STANDS

SplitBlock SB 22 - 52”

Commissioning 2012

Production data

Material stainless-steel strip

AISI 200, 300, and 400

Strip width 800 to 1,300 mm

Strip thickness

ingoing max. 6.0 mm

outgoing min. 0.15 mm

Coil weight max. 28,000 kg

Technical data

Stand type SB 22 - 52”

Rolling speed max. 700 m/min

Rolling force 8,000 kN

Strip tension max. 500 kN

Capacity 80,000 tpy

Technical features

- Servohydraulic roll-gap control (AGC)

- Crown adjustment for backup shafts A/D and F/G

- Shifting of first intermediate rolls bymeans of a push/pull system

- SUPAFINE® filtration system for coolingand ultrafine filtering of the rolling oil used

- Mathematical model

- Thickness and flatness control systems

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CHIA FAR, Taiwan

20-high stand for challenging

final products

Using its new X-Roll® cold rolling mill inSplitBlock design, the Taiwanese com-pany produces superior-grade stainless-steel strip that meets the high surfacequality requirements of the IT industry.The size-SB 22 - 54“ cold rolling mill rollsaustenitic and ferritic strip in widths from650 to 1,350 mm with a maximum entrythickness of 5.0 mm down to a minimumfinal thickness of 0.15 mm. Extra specialhere is that the plant can handle thickerstainless-steel strip as input stock. Thismaterial is cheaper than thinner inputstock.

There are further advantages due to thedesign of the stand. The split structure in an upper and a lower half means thestand opens wider. As a result, it canaccommodate larger-diameter work rolls.Simultaneously, the design provides veryeasy access during roll changing.

Threading in the strip head end also getseasier. The cooling effect is enhancedbecause the heat can dissipate moreeffectively through the halves of thestand. We also added a roll changingrobot for optimized, reproducible work roll and intermediate roll changing. Therobot changes the work rolls in pairs fullyautomatically and in record time.

Overall view of the rolling mill.

Upper and lower roll sets.

SPLITBLOCK STANDS

Included in the scope of delivery is our tried-and-tested SUPAFINE® filter system for cooling and ultrafine filteringof the rolling oil used. What makes ourSUPAFINE® filter systems stand out istheir top cleaning performance at lowoperational costs. They do not requireany filter aids, plus they generate littlewaste, while oil consumption is low. The system is fully automated for maxi-mum operational safety.

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Fully automated rollchanging.

20-HIGH MILL STAND


Commissioning 2012

Production data


AISI 300 and 400 series


Strip thickness

ingoing max. 5.0 mm



Technical data



Rolling force 8,000 kN


Capacity 100,000 tpy

Technical features




- Fully automated roll changing robot




Crown adjustment A and D. SplitBlock stand.

Overall view of the rolling mill with main pulpit.

YIEH UNITED STEEL, TaiwanMill No. 2

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Second 20-high stand

from SMS

This size-22 SplitBlock stand is the sec-ond roll stand SMS group built for YiehUnited Steel Corporation (YUSCO). Hereagain, due to its good experience withthe first facility, our customer opted forthis proven design.

Just like mill stand No. 1, this secondcold rolling stand incorporates all theactuators or control elements requiredfor roll-gap setting. This is ideal for pro-cessing all sorts of strip qualities into precisely rolled finished products.

Also included are a thickness and flat-ness control system as well as a mathe-matical model developed by SMS thatpreset all rolling parameters and controlsthem fully automatically during rolling.There was no need to install an extrauncoiling station because the startingmaterial is introduced into the processdirectly at the reversing coilers.


SPLITBLOCK STANDS

Roll changing.

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20-HIGH MILL STAND


Commissioning 2008

Production data




Strip thickness

ingoing max. 6.0 mm

outgoing 0.15 to 3.0 mm


Technical data


Rolling speed max. 700 m /min

Rolling force max. 7,850 kN


Capacity 80,000 tpy

Technical features







LIANZHONG STAINLESS STEEL,China, Mill No. 1

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20-high stand

for greenfield location

Lianzhong Stainless Steel Corporation(LISCO), a subsidiary of Taiwan’s YiehUnited Steel Corporation, is a productionfacility built on a greenfield site in south-ern China. To equip this new plant, SMSsupplied one size-22 SplitBlock stand fora rolling width of 1,300 mm as well asone size-21 MonoBlock stand for 1,600-mm-wide strip. Both stands were com-pleted within a very short time and wenton stream in 2006.

The 20-high SplitBlock stand, built in ourHilchenbach workshops, was completelypreassembled, including entry and exit-end equipment as well as the stand plat-form. That allowed us to test the keymotions and functions of the hydraulicsystem prior to final installation in ourcustomer’s works. As a result, we man-aged to cut the original erection andcommissioning schedule by severalweeks.

There are also various actuators or con-trol elements for roll-gap setting thatensure the cold-rolling stand can processa whole range of strip qualities. Also fea-tured is a thickness and flatness controlsystem. All rolling parameters are presetby SMS on the basis of a mathematicalmodel and controlled fully automaticallyduring the rolling process.

SplitBlock stand.

Top and bottom roll sets. Backup shaft adjustment in detail.

SPLITBLOCK STANDS


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20-HIGH MILL STAND


Commissioning 2006

Production data


AISI 300 and

400 series


Strip thickness

ingoing max. 6.0 mm



Technical data





Capacity 80,000 tpy

Technical features







Preassembly in our shop.

20-high stand

for foil production

SMS group received an order from VDMMetals, Germany to build a 20-high coldrolling mill. It is designed for the safe andreliable production of foils – especiallyultrathin foils down to a minimum finalthickness of 20 µm.

The foils consist of high-strength specialalloys and are used for instance in auto-motive catalytic converters. SMS sup-plied the plant on a turnkey basis com-plete with mechanical equipment, utilitysystems, and electrics and automation.

Also featured are highly dynamic actua-tors and effective control systems in theroll stand that optimize the production ofultrathin foils with thickness tolerancesdown to 1 µm. To achieve this level ofperformance, the mill is equipped withfeed-forward and feed-backward mass-flow control systems for thickness con-trol. Here, for the first time in a cold-rolling facility, we incorporated our newSMS flatness measuring roll with closedroll surface.

The mill stand is fitted with all controlelements required to produce super-flatstrip. This includes crown adjustment onbackup shafts A and D, shifting of thefirst intermediate rolls, and adjustingoptions such as tilting and swiveling ofthe top roll set by an AGC system.

VDM METALS, Germany

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SplitBlock mill with main pulpit.Belt wrapper.

Plate-type filter system. SMS group’s flatness measuring roll.

The additional uncoiling station with pay-off reel and S-roll set reduces thenonproductive times during coil changingand ensures maximum strip tensionsduring the initial pass.

SPLITBLOCK STANDS


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20-HIGH MILL STAND


Commissioning 2002

Production data


AISI 300 and

400 series,

special steels

Strip width 350 to 750 mm

Strip thickness

ingoing max. 1.0 mm

outgoing 0.02 mm


Technical data





Capacity 5,000 tpy

Technical features


- Crown adjustment for backup shafts A and D


- Additional uncoiling station with S-roll set

- Plate-type filter system for cooling andultrafine filtering of the rolling oil used

- Complete automation including thicknessand flatness control systems from SMSSiemag

Exit section.

First SplitBlock stand

in size SB22

The 20-high mill stand at Yieh UnitedSteel Corporation is the first size-22 SplitBlock stand ever built by SMS group.Taiwan’s largest stainless-steel producer,Yieh United Steel Corporation (YUSCO)operates this 20-high mill to roll strip in widths of 800 to 1,300 mm down tofinal thicknesses of 0.15 mm.

Using its large number of actuators orcontrol elements for roll-gap setting, the roll stand is able to process a wholerange of strip qualities. This was the firsttime we positioned the hydraulic roll-gapadjusting cylinders in the upper part ofthe stand to provide ready access formaintenance. All rolling parameters arepreset by a mathematical model fromSMS and controlled fully automaticallyduring the rolling process. Also installedare control systems to ensure precisefinal thicknesses and perfectly flat strip.

The coils go directly on the reversingcoiler, so there is no need for a separateuncoiling station with pinch roll leveler.

YIEH UNITED STEEL, TaiwanMill No. 1

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SplitBlock stand.

Roll changing.

Coil loading.

SPLITBLOCK STANDS


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20-HIGH MILL STAND


Commissioning 2001

Production data


AISI 300 and

400 series


Strip thickness

ingoing max. 6.0 mm



Technical data





Capacity 80,000 tpy

Technical features







Stand exit side.

OUTOKUMPU, Finland

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20-high stand

for wide stainless-steel strip

The largest SplitBlock stand ever built bySMS group is in operation at Outokumpu(formerly Outokumpu Stainless Steel) inTornio, Finland. It’s the third 20-high rollstand at the Tornio location. Featuring arolling force of 16,000 kN and a maxi-mum strip tension of 600 kN, this power-ful facility is able to process stainless-steel strip in widths of up to 1,625 mmand ingoing thicknesses of up to 8 mm.Coil handling is fully automated usingself-driven coil cars.

The backup shafts are secured in thestand block by a hydraulic saddle clamp-ing device, so there is no need for themaintenance crew to detach them manu-ally. Equally impressive is a robot systemthat changes the work rolls and the firstintermediate rolls fully automatically. The uncoiling station with leveler unitreduces idle times during coil changing.

A large number of actuators or controlelements for roll-gap setting ensure per-fect processing of a whole range of stripqualities. Also included are a thicknessand flatness control system, a mathe-matical model for presetting the rollingparameters, and fully automatic rollingprocess control.

SplitBlock roll stand.

Coil strapping station.

SPLITBLOCK STANDS


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20-HIGH MILL STAND


Commissioning 1996

Production data


AISI 300 and

400 series


Strip thickness

ingoing max. 8.0 mm



Technical data

Stand type SB 21 - 64”Rolling speed max. 800 m /minRolling force max. 16,000 kNStrip tension max. 600 kNCapacity 150,000 tpy

Technical features


- Crown adjustment for backup shafts A to D


- Fully automated roll-changing robot

- Additional uncoiling station with pinch rollleveler for coil preparation

- SUPAMIC® filtration system for coolingand ultrafine filtering of the rolling oil used



Roll changing robot.

POSCO, South Korea

20-high stand

for large coils

This 20-high rolling mill processes stain-less-steel strip introduced in coils weigh-ing up to 35 t, with diameters of up to2,400 mm. Starting from a maximumentry thickness of 5 mm, the material isrolled to a minimum final thickness of 0.1 mm. Various actuators or control ele-ments for roll-gap setting ensure a wholerange of strip qualities can be processedwith top results.

What also makes this mill stand out is the fact that the work rolls and the firstintermediate rolls are changed fully auto-matically, while the second intermediaterolls and the backup shafts are changedin semiautomatic mode. The hydraulic saddle clamping device that holds thebackup shafts in the stand block elimi-nates the need for the maintenance crewto unclamp them manually. Plus there isan automated transport system that sup-plies the paper winders with fresh papercoils from a store beside the roll stand. To boost productivity, the mill is equippedwith an uncoiling station and a leveler unitfor shorter nonproductive times duringcoil changing. The coil loading and stripthreading sequences are automated.

Also installed here is a thickness and flat-ness control system. All rolling parame-ters are preset using a mathematicalmodel and controlled fully automaticallyduring the rolling process.

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SplitBlock stand.

Uncoiling station. Main control pulpit.

SPLITBLOCK STANDS


21

20-HIGH MILL STAND


Commissioning 1995

Production data


AISI 300 and

400 series


Strip thickness

ingoing max. 5.0 (5.5) mm

outgoing min. 0.1 to 2.0 mm


Technical data






Technical features









Automatic roll-changingrobot.

OUTOKUMPU NIROSTA, Germany

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20-high stand

for maximum rolling speeds

This 20-high stand, the fourth at theKrefeld location, processes stainless-steel strip with ingoing thicknesses of up to 8 mm. Configured for top outputand performance, the facility achieves amaximum rolling speed of 1,000 m/min.It comes with a large variety of actuatorsor control elements for roll-gap setting,so the stand can process a whole rangeof strip qualities.

The plant features fully automatic chang-ing of the work rolls and first intermedi-ate rolls, with semi-automatic changingof the second intermediate rolls andbackup shafts. A hydraulic saddle clamp-ing device secures the backup shafts inthe stand block so that manual unclamp-ing by the maintenance crew is unneces-sary. Also featured is an uncoiling stationwith walking-beam coil conveyor and leveler unit that reduces the idle timesduring coil changing. This increases themill’s productivity. The sequences for coil loading and strip threading are auto-mated.

Easy maintenance and ready access areensured by central arrangement of allhydraulic controls on a platform behindthe stand. Finally, there is an extensiveprocess control system consisting of anX-ray thickness measuring system, athickness control system, a flatnessmeasuring roll, and a control system aswell as a mathematical model for preset-ting and controlling all rolling parameters.

Main control pulpit.

Stand block with rolls.

SPLITBLOCK STANDS


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20-HIGH MILL STAND


Commissioning 1995

Production data

Material stainless-steel stripAISI 300 and 400 series

Strip width 500 to 1,350 mmStrip thicknessingoing max. 8.0 mmoutgoing 0.2 to 3.0 mm


Technical data

Stand type SB 21 - 53”Rolling speed max. 1,000 m /minRolling force max. 12,000 kNStrip tension max. 500 kNCapacity 120,000 tpy

Technical features








- Thickness control system

- Flatness control system

SplitBlock roll stand.


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MonoBlock StandsSMS group

26

20-high stand

for mirror finish grades

North American Stainless (NAS), USA, asubsidiary of the Spanish Acerinox Group,awarded SMS group a contract in 2015for a 20-high MonoBlock cold rolling mill.NAS intends to use the size-MB22B-54”rolling mill in its state-of-the-art, high-per-formance production facility for bright-annealed stainless-steel strip in Ghent,Kentucky. Apart from the cold rolling mill,SMS group is supplying NAS with themost modern and powerful bright anneal-ing line anywhere in the USA.

There is good reason for NAS to makethis investment. It enables the companyto expand into the production of bright-annealed stainless steel. This material isincreasingly in demand in the USA, whichcurrently relies partly on imports. Immedi-ately striking about the cold-rolled stain-less steel strip with BA surface quality isthe mirror finish. Typical applications arehousehold appliances and kitchen uten-sils. Furthermore, it’s a versatile materialused for many other products that requirenot only the properties of stainless steel,but also high-quality, polished surfaces –for instance medical instruments or prod-ucts in the transport sector.

The new plants will process bothaustenitic and ferritic grades (AISI 200,300, and 400 series). The finished material will measure between 600 and 1,350 mm wide and between 0.15and 1.5 mm thick. Not only responsiblefor the mechanical systems, process

NORTH AMERICAN STAINLESS(NAS), USA

engineering, furnace technology, and electrics andautomation, SMS will also provide commissioning sup-port and operator training. The entire strip guide controlsystem will come from EMG Automation.

The 20-high MonoBlock cold rolling mill of type MB22B-54” will process hot strip thicknesses of up to 6.2 mil-limeters. Characteristic of the compact and robust plantis the high stand rigidity. It achieves a maximum rollingrate of 800 meters per minute and a maximum roll sepa-rating force of 8,000 kN for impressive thickness reduc-tion. Among the stand-out features are roll-gap controland crown adjustment for backup shafts B/C and F/G aswell as first intermediate roll shifting. Also included in the supply package are the auxiliary and additional plants.For instance, the regenerative SUPAFINE® filter systemensures eco-friendly cleaning and efficient cooling of therolling oil. Equally important for the plant's green creden-tials is the extraction system. It complies with the strictlocal environment protection laws. To reduce idle times,the mill is equipped with two reversing coilers and anuncoiling station with a leveler and cropping shear.

MONOBLOCK STANDS

SMS group supplies the complete 20-high cold rollingmill including X-pact® electric and automation.

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20-HIGH MILL STAND

MonoBlock MB 22 B - 54”

Commissioning 2017

Production data


AISI 200, 300, and 400

(mirror finish surface qualities)


Strip thickness

ingoing max. 6.2 mm



Technical data

Stand type MB 22 B - 54”




Capacity 95,000 tpy

Technical features


- Crown adjustment for backup shafts B/Cand F/G

- Shifting of first intermediate rolls by meansof a push/push system

- Additional uncoiling station with pinch rollleveler and crop shear for coil preparation

- SUPAFINE® filtration system for cooling and ultrafine filtering of the rolling oil used

- Oil mist extraction system with high filtration



Mill stand design including drive system.

MonoBlock Stands

MONOBLOCK STANDS

SMS group

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First SMS 20-high stand

for Malaysia

Since 2012, Bahru Stainless SDN BHDhas been operating Malaysia’s first 20-high cold rolling mill. The plant wassupplied by SMS group. Prior to its longjourney to South-East Asia, the machinewas pre-assembled in the SMS work-shop in Hilchenbach. As a result of thepre-assembly and subsequent functionaltests, installation and runup in Malaysiawent without a hitch.

Bahru Stainless ordered the 20-high cold rolling mill from SMS group for itsnew cold strip complex in Johor Bahru in February 2011. The Asian cold stripmanufacturer is a member of the Span-ish Acerinox Group, one of the world’slargest stainless steel producers. Demon-strating just how strong it is, the com-pany built a facility in Southern Malaysiathat will produce one million t of stain-less steel strip per year in its final expan-sion phase.

BAHRU STAINLESS, Malaysia

SMS supplied the 20-high MB 22 B - 52”cold rolling mill. It processes austeniticand ferritic strip grades in widths of up to 1,320 millimeters and achieves maxi-mum thickness reduction. Astonishingthough it may seem, the minimum rolled final gage is 0.15 mm while rollingspeeds of up to 800 meters per minuteare possible.

Included in the scope of supply are theentry and exit groups with high-tensionreversing coilers for strip tensions of upto 500 kN, the leveler, and the croppingshear. To ensure eco-friendly cleaningand cooling of the rolling oil, the plantalso features our proven SUPAFINE®

filter system.

As ever, the SMS workshop in Hilchen-bach manufactured the key componentsof the cold rolling mill to high qualitystandards. They were pre-assembledincluding piping and cabling, then sub-jected to functional tests.

View of the pre-assembledmill stand.

Semi-automated roll changing.

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The “heart” of the cold rolling mill stand: the housing window inMonoBlock design. Equipped with hydraulic roll-gap control.

Pre-assembled platform module with integratedcolumn-type valve units and piping.

20-HIGH MILL STAND


Commissioning 2012

Production data


AISI 200, 300, and 400

Strip width 800 - 1,320 mm

Strip thickness

ingoing max. 6.35 mm



Technical data






Technical features


- Crown adjustment for backup shafts B/C and F/G

- Shifting of first intermediate rolls bymeans of a push/push system





BAHRUSTAINLESS

MonoBlock Stands

MONOBLOCK STANDS

SMS group

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Two 20-high stands

for stainless steel start-up

When one of China’s largest steel pro-ducers, Benxi Iron & Steel (Group) Co.,entered into the large-scale production of high-quality stainless steel strip, it wasan exciting development on the Chinesesteel market. To implement its plans, the group ordered two X-Roll® cold rollingmill stands in 20-high design from SMSgroup in April 2008. Following commis-sioning in summer and fall 2010, BenxiIron & Steel boasted the capacity to pro-duce a massive 200,000 t of stainless-steel strip per year.

The new 20-high MonoBlock cold rollingmill stands roll stainless-steel hot strip(annealed and pickled) of series types300 and 400. They are capable of pro-cessing strip up to 1,350 mm wide and 6 mm thick. After processing, the mini-mum final gage is 0.2 mm. Each plantfeatures a total drive power of 12,500 kWfor rolling speeds of up to 800 metersper minute.

When deciding on the rolling mill technol-ogy, the steel giant considered not onlythe high quality of the final products, but also eco-friendly production methods.To save resources and protect the envi-ronment, both X-Roll® systems wereequipped with modern SUPAFINE® filtersystems.

BENXI IRON & STEEL(GROUP) CO., China

SMS developed this solution specificallyfor ultrafine filtration of rolling oils. Itoperates without filter aids, so it gener-ates no unusable waste products. Alsoincluded in our scope of supply is theextraction system.

Keen to successfully complete thesestrategically important plants, Benxi Iron& Steel relied on our comprehensiveexpertise. SMS designed and manufac-tured the mechanical equipment, super-vised assembly and installation, and wasalso responsible for the commissioningon site.

Then, after manufacturing the core com-ponents in our workshops in Hilchen-bach, we pre-assembled individual plantmodules and put them through extensivefunctional tests. That ensured fast andsmooth start of production in China.


The first coil rolled.

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TWO 20-HIGH MILL STANDS


Commissioning 2012

Production data



Strip width 1,000 to 1,350 mm

Strip thickness

ingoing max. 6.0 mm



Technical data






Technical features


- Crown adjustment for backup shafts B/C (prepared for backup shafts F/G)






Main control station withprocess control system.

MonoBlock Stands

MONOBLOCK STANDS

SMS group

32

Multi-talent for stainless steel,

titanium, and special grades

It was May 2011 when Chinese companyBaoshan Special Steel Branch, or BSSB,issued us with the Final Acceptance Certificate (FAC) for the 20-high type-MB 22 B - 52” cold rolling mill we sup-plied. BSSB uses the mill to roll austeniticand ferritic stainless steel strip, specialsteel strip, and strip made of titaniumand nickel special alloys. The strip widthsvary between 600 and 1,300 mm andreach minimum final thicknesses of 0.3 mm. That is after a maximum ingoingthickness of 7.0 mm.

The core of the plant is the MonoBlockmill stand. This stand type comes withmany advantages and ensures cost-effective production of cold strip made of stainless steel, titanium, and specialsteels. Particularly useful is the modulardesign. It means we can pre-assembleand test the plant in advance. This signifi-cantly reduces the manufacturing andfinal assembly times.

The rolling mill boasts a capacity of60,000 tpy and is part of BSSB’s newproduction plant for high-performancematerials. Incidentally, we also supplied a continuous annealing and pickling linefor this facility.

BAOSHAN SPECIAL STEELBRANCH, BSSB, China


Pre-assembly and functional testing.

Changing the backup shafts.

33

20-HIGH MILL STAND


Commissioning 2011

Production data



titanium strip and nickel special alloys


Strip thickness

ingoing max. 7.0 mm



Technical data





Capacity 60,000 tpy

Technical features


- Crown adjustment for backup shafts B/C(prepared for backup shafts F/G)






SUPAFINE® rolling oil filtration system.

MonoBlock Stands

MONOBLOCK STANDS

Third and fourth 20-high stand

from SMS

Seeing that we successfully set up thestainless-steel production at its Tianjinlocation, our customer decided to expandfurther into the profitable stainless-steelmarket. To ensure quick and smoothimplementation of this project, ZJYTSSopted for us to supply two new 20-highrolling mills. They are planning to doublethe existing plant’s cold-rolling capacity to 400,000 t.

Just like mill stands No. 1 and 2, thenew cold-rolling facilities are built in theproven MonoBlock design and equippedwith cutting-edge technology from SMSgroup. The production range comprisesstainless-steel strip with a maximumwidth of 1,350 mm and ingoing thick-nesses of up to 6 mm rolled down to afinal minimum thickness 0.15 mm.

Both sides of the roll stands are fittedwith high-tension reversing coilers plusthe entry and exit facilities required forcost-effective production of stainlesssteel strip. There was no need to investin an additional uncoiling station becausethe input coils can be loaded directlyonto the reversing coilers. Installed inboth mills is not only a highly dynamicthickness and flatness control system,but also a mathematical model for pre-setting all process parameters, and fully automatic control of the rollingprocess.

Main control pulpit with processcontrol system.

SMS group

34

ZHEJIANG YUANTONG STAINLESS STEEL, ZJYTSS, China

Control stand.

Starting material.

20-HIGH MILL STANDS


Commissioning 2009

Production data


AISI 300 and

400 series


Strip thickness

ingoing max. 6.0 mm



Technical data

Type of stands MB 22 B - 54”




Capacity 80,000 tpy

Technical features







To use resources as economically as possible and to protect the environment,the two mills are equipped with a mod-ern SUPAFINE® filtration system for efficiently cleaning and cooling therolling oil. Invaluable here is that our cus-tomer can draw on the proven equip-ment, vast experience, and special SMSknow-how in the field of ultrafine filtra-tion of rolling oil.

35

Photo, left: Work rolls with strip cooling.Photo, right: High-tension reversing coiler.

MonoBlock Stands

MONOBLOCK STANDS

Gesamtsicht des MonoBlock-Walzgerüsts.

ACCIAI SPECIALI TERNI, Italy, Mill No. 7

Seventh 20-high stand

from SMS

Using proven plant technology and equipment made by SMS group, theTerni location in Italy is set to continue its success story. That’s because thenew cold rolling mill incorporates leading-edge stand technology and is already the seventh MonoBlock our customer hasordered from SMS group for its Ternioperations.

Acciai Speciali Terni is Italy’s largeststainless-steel producer and belongs tothe ThyssenKrupp Stainless group, aEuropean producer of high-quality stain-less-steel strip designed to supply glob-ally rising demand.

This mill in proven, compact MonoBlockdesign processes pickled stainless-steelstrip of the AISI 400 (ferritic) and AISI300 (austenitic) grades in widths of up to1,370 mm and maximum ingoing thick-nesses of 6.3 mm.

Overall view of the MonoBlock mill stand.

MonoBlock with roll set.

36

It took just 12 months to completedesign, procurement, manufacture, andshop assembly. The MonoBlock – includ-ing the base frame and gear unit – waspre-assembled before transport to Italy,installed in record time, and commis-sioned several weeks ahead of the con-tracted deadline.

The mill consists of two reversing coil-ers, one uncoiling station with levelerunit, and a mobile crop shear to minimizethe nonproductive times during coilchanging. Fully automated control sys-tems for precise strip thickness and opti-mal flatness ensure cold-rolled finishedproducts of supreme quality. All rollingparameters are preset automatically by a mathematical model.

Included in the SMS supply scope were the design, manufacture, erection,and commissioning of the mechanicalequipment including ancillaries such ashydraulic, rolling-oil, fire-extinguishing,and fume exhaust systems.

Control stand.

SMS group

20-HIGH MILL STAND


Commissioning 2006

Production data


AISI 300 and

400 series


Strip thickness

ingoing max. 6.3 mm



Technical data





Capacity 80,000 tpy

Technical features








37

Main mill-stand drives.

MonoBlock Stands

MONOBLOCK STANDS

Second 20-high stand

from SMS

It was just one year after branching outinto the stainless-steel market in 2005that Zhejiang Yuantong Stainless Steel,ZJYTSS, ordered and commissioned afurther 20-high cold-rolling stand fromSMS. Building mill No. 2 represented the next step in ZJYTSS’s expansion program. This helped the ambitious company to boost production by another80,000 tpy of top-quality stainless-steelstrip.

Identical in design to stand No. 1, millstand No. 2 processes pickled stainless-steel strip with a maximum width of1,350 mm and ingoing thicknesses of up to 6 mm.

What makes the “Zero-Crown”MonoBlock stand out is its high rigidity.Plus it features entry and exit-side high-tension reversing coilers as well as allthe required auxiliary equipment.

An additional uncoiling station with pinchroll leveler increases productivity byallowing all preparatory work for the nextcoil to be done while rolling is underway.

To achieve closest thickness tolerancesand optimal flatness, the plant comeswith effective control systems. Themathematical model controls all the para-meters required for reliable and preciserolling fully automatically.

Additional uncoiling station.

Total plant.

Exit section.

38

SMS group

ZHEJIANG YUANTONG STAINLESS STEEL, ZJYTSS, China

20-HIGH MILL STAND


Commissioning 2006

Production data


AISI 300 and

400 series


Strip thickness

ingoing max. 6.0 mm



Technical data





Capacity 80,000 tpy

Technical features








39

MonoBlock with reversingcoilers.

MonoBlock Stands

MONOBLOCK STANDS

LIANZHONG STAINLESS STEEL, China, Mill No. 2

20-high stand for wide

stainless-steel strip

Lianzhong Stainless Steel Corporation(LISCO), a subsidiary of Taiwan’s YiehUnited Steel Corporation, operates a pro-duction facility built on a greenfield sitein southern China. Highly satisfied withthe equipment at its main location in Taiwan, our customer decided to utilizeonce again SMS group’s proven 20-highstand technology and equipment at itsnew production plant in China.

Included in the SMS supply scope wasnot only the size-22 SplitBlock stand, but also a second cold-rolling mill inMonoBlock design. This stand processesstainless-steel strip with a maximumwidth of 1,600 mm and ingoing thick-nesses of up to 6 mm into high-qualitycold strip.

The wide stand block is of “Zero-Crown”design and features excellent rigidity atminimum mill spring under rolling load.To provide for easier and reduced mainte-nance, the backup shafts are secured inthe stand block by a hydraulic saddleclamping device.

Fully automated thickness and flatnesscontrol systems ensure precisely rolledcold strip with closest tolerances. TheSMS mathematical model automaticallypresets all rolling parameters, which arethen controlled online during the rollingprocess.

Preassembly and function test.

40

SMS group

Hydraulic adjusting systems. Stand block with rolls.

20-HIGH MILL STAND

MonoBlock MB 21 BB - 63”

Commissioning 2006

Production data


AISI 300 and

400 series


Strip thickness

ingoing max. 6.0 mm



Technical Data

Stand type MB 21 BB - 63”





Technical features


- Crown adjustment for backup shafts B/C(prepared for backup shafts A and D)





41

Reversing pull-up coiler.

MonoBlock Stands

MONOBLOCK STANDS

SMS group

42

Five 20-high stands

for stainless-steel strip

Taiyuan Iron & Steel Co. Ltd. (TISCO),China’s leading stainless-steel producer,ordered five 20-high mills from SMSgroup at a stroke. This was the largestsingle order for 20-high roll stands everawarded to any supplier. Even so, all ofthe stands went on stream ahead of thecontracted deadline. Not only responsiblefor these five 20-high mills, SMS alsosupplied TISCO with an inline skin-passmill for its hot-strip annealing and picklingline in 2005.

The MonoBlock cold-rolling facilities are designed to process very high coilweights of up to 35 t with a maximumcoil diameter of 2,400 mm.

All of the 20-high stands feature high-tension reversing coilers on both sides as well as the necessary entry and exitequipment. The first mill additionallyincorporates an uncoiling station for effi-cient and smooth processing of hot stripcoils with maximum strip thicknesses.

To ensure closest tolerances, each of thecold-rolling stands features a thicknessand flatness control system. A mathe-matical model presets all rolling parame-ters, which are then controlled fully auto-matically during the rolling process.

Overall plant.

Stand platform withhydraulic control.

Mill stand with roll set.

SHANXI TAIGANG STAINLESSSTEEL COMPANY, China

43

FIVE 20-HIGH MILL STANDS


Commissioning 2005

Production data


AISI 300 and

400 series


Strip thickness

ingoing max. 6.0 mm



Technical data





Capacity 80,000 tpy

Technical features




- One stand with additional uncoiling stationincluding pinch roll leveler for coil prepara-tion




Shop preassembly.

MonoBlock Stands

MONOBLOCK STANDS

ZJYTSS YUANTONG STAINLESSSTEEL, China, Mill No. 1

First 20-high stand

for a “newcomer”

ZJYTSS Yuantong Stainless Steel WareCorp., a young company on the Chinesestainless-steel market, is based in theTianjin Economic Development Area.Right there, where even global playerslike Airbus are building an assemblyplant, our customer chose this high-techindustrial park for its top-notch produc-tion facility.

To gain entry into the high-quality stain-less-steel strip market, ZJYTSS opted fora 20-high cold-rolling mill that producesfirst-class cold strip. It’s designed toprocess pickled stainless-steel strip witha maximum width of 1,350 mm and ingo-ing thickness of up to 6 mm. Provenplant technology and equipment as wellas easy operation smooth the way forsuccessful production at this new loca-tion in China.

SMS group

44

MonoBlock roll stand.

Additional uncoiling station. Stand with reversing coilers.

Central to the mill is an MB22 MonoBlockstand complemented by two high-ten-sion reversing coilers and an uncoilingstation to reduce idle times.

All rolling parameters are set by a mathe-matical model and controlled fully auto-matically during rolling.

One of China’s largest pipe makers,ZJYTSS Tianjin Pipe Corporation Ltd. has been cooperating closely with SMScompanies for years. So it came as nosurprise that our customer opted forSMS group to expand its product port -folio.

45

20-HIGH MILL STAND


Commissioning 2005

Production data


AISI 300 and

400 series


Strip thickness

ingoing max. 6.0 mm



Technical data





Capacity 80,000 tpy

Technical features


- Crown adjustment for backup shafts B/Cand F/G






Roll set.

MonoBlock Stands

MONOBLOCK STANDS

20-high stand for German-

Chinese joint venture

Ever since 2001, Shanghai Krupp Stain-less Co. Ltd. (SKS) has been producinghigh-quality stainless-steel strip ofaustenitic and ferritic grades on a 20-highcold rolling mill manufactured by SMSgroup. SKS is a joint venture betweenOutokumpu Nirosta (formerly ThyssenKrupp Stainless) and Baosteel that pro-duces stainless steel in China.

What began with its German operationsin Krefeld, Benrath, and Dillenburg led toOutokumpu Nirosta’s logically consistentdecision to equip the Shanghai plant withproven 20-high stand technology andequipment engineered by SMS.

The new mill in MonoBlock designprocesses pickled stainless steel stripwith a maximum width of 1,340 mmfrom an ingoing thickness of up to 5 mm.

SHANGHAI KRUPP STAINLESS, China

SMS group

46

Main control pulpit withprocess control system.

Thickness measurement.

The works premises of SKS(Shanghai Krupp Stainless).

Additional uncoiling station.

To boost mill capacity, the cold-rollingstand incorporates an additional uncoilingstation that reduces nonproductive timesduring coil changing.

As part of the stand automation, thethickness and flatness control systemensures precise strip dimensions withclosest tolerances. All rolling parametersare preset and controlled fully automati-cally during rolling by a mathematicalmodel from SMS.

47

20-HIGH MILL STAND


Commissioning 2001

Production data


AISI 300 and

400 series (mirror finish surface qualities)


Strip thickness

ingoing max. 5.0 mm



Technical data





Capacity 80,000 tpy

Technical features








Flatness measuring roll.Roll set.

MonoBlock Stands

MONOBLOCK STANDS

ACCIAI SPECIALI TERNI,Italy, Mill No. 6

Large 20-high stand for wide

stainless-steel strip

To be able to add even wide strip to therange produced at its Terni location, ourcustomer once again opted for a plantmade by SMS group.

The 20-high mill in the proven, compactMonoBlock design processes stainlesssteel strip in widths of up to 1,575 mmfrom ingoing thicknesses of max. 5 mm.

Special here is the “Zero-Crown” standblock design featuring maximum rigidityat minimum mill spring under rolling load.

It’s the sixth 20-high cold-rolling mill SMShas built for this customer.

To ensure easier replacement, thebackup shafts are secured in the standblock by a hydraulic saddle clampingdevice. Also included in the mill is a fullyautomatic thickness and flatness controlsystem. All rolling parameters are presetby a mathematical model and controlledonline during operation.

What happens here is that the input coilsare introduced into the process directlyat the reversing coiler. That eliminatesthe need for extra investment in anuncoiling station.

SMS group

48

MonoBlock mill stand.

Roll changing.

49

20-HIGH MILL STAND

MonoBlock MB 21 BB - 62”

Commissioning 2000

Production data

Material stainless-steel stripAISI 300 and 400 series


Strip thickness

ingoing max. 5.0 mm



Technical data

Stand type MB 21 BB - 62”





Technical features


- Crown adjustment for backup shafts B/C(prepared for backup shafts A and D)





SUPAFINE® filtration system.

18-HS StandsSMS group

50

Mill stand of the TCM 300.

Integrated tandem mill

for stainless-steel cold strip

Chinese stainless steel producer TISCO(Shanxi Taigang Stainless Steel Com-pany), a subsidiary of the Taigang GroupInternational Trade Co. Ltd., awardedSMS group a contract for two fully con-tinuous cold tandem mills in CVC® plussix-high and 18-HS design, both featuringa strip cleaning section. This investmentgives TISCO an extra capacity of morethan one million t of stainless-steel stripper year.

Each cold rolling mill forms the heart ofan integrated, continuous production linefor stainless-steel cold strip, also knownas a white sheet rolling annealing andpickling line (WRAPL). The two new production lines will be erected by a con-sortium in Taiyuan city in the Chineseprovince of Shanxi. The WRAPL configu-ration ensures TISCO produces stainlesssteel especially cost-effectively becauserolling, annealing, and pickling all takeplace in one pass.

As the supplier of the tandem mills, thetwo strip cleaning sections, and the ten-sion roll sets, SMS group is a significantmember of the consortium. Both tandemmills process hot strip pre-treated in ahot strip annealing and pickling line alsosupplied by SMS.

This TCM 300 tandem mill in 18-HSdesign is the second of its kind in theworld. The first was built by SMS in2009. It rolls AISI 300-series stainless-steel strip and has an annual capacity of up to 600,000 t.

SHANXI TAIGANG STAINLESSSTEEL COMPANY, China

The annealed and pickled stainless-steelstrip enters the five-stand mill at a speedof up to 170 meters per minute.

Further down the line, the top processspeed in the run-out area is 370 metersper minute. Here, the finished coilsweigh a maximum of 35 t. The high-techtandem line features five mill stands in18-HS design (HS = horizontal stabiliza-tion). Particularly high reductions perpass result from the slimline work rolls,making production especially cost-effec-tive.

Completing both tandem mills is a strip cleaning section from SMS. Some30 meters long, the horizontal cleaningsection removes residual rolling emulsionfrom the surface in several processstages. The stages are separated fromeach other by squeeze rolls, and eachstage has its own circulation system.

18-HS STANDS

The TCM 300 tandem mill for stainless steelduring commissioning.

51

FIVE 18-HS MILL STANDS

18-HS ZR 615 A - 64”

Commissioning 2014

Production data



Strip width 1,040 to 1,650 mm

Strip thickness

ingoing 2.0 to 6.0 mm



Technical data

Stand type 18-HS ZR 615 A - 64“

Rolling speed 340 m/min. (outgoing)

Roll separating force max. 18,000 kN

Strip tension max. 400 kN (ingoing)


Technical features


- HS shifting for the work rolls

- Intermediate roll shifting system

- Intermediate roll bending system

- Emulsion system for cooling and filteringthe coolant-lubricant used

- Mathematical model for presetting allrolling parameters

- Thickness control systems

18-HS stand design.

Shanxi Taigang Stainless Steel contracted SMS group to supply two tandemmills for stainless steel cold strip to China. On the right, the TCM 300 withfive stands in 18-HS design.

18-HS StandsSMS group

52

Entry area looper.

Four-stand high-tech

tandem cold rolling mill

During a ceremony on December 16,2009 attended by POSCO-Chairman Joon-Yang Chung, the new four-standhigh-tech tandem cold rolling mill we builtfor POSCO was officially put into opera-tion. POSCO exclusively uses this fullycontinuous tandem mill in 18-HS designthat is unique in the world for stainless-steel strip. Much earlier, at the end ofAugust, the mill was commissioned, andone-shift production had already started.

Immediately afterward, the plant achieveda model runup phase. It easily met all pro-duction requirements. The record produc-tion volume for a single day in this phasewas around 1,500 t of rolled stainlessstrip. Some results were even better thanthe target, for example the work rollchanging time was under the prescribedtwo minutes per roll set.

High reductions per pass. The core com-ponents of the high-tech tandem mill arethe four stands in 18-HS design. Specialfeatures included are the small-diameterwork rolls for exceptionally high reduc-tions per pass. That ensures extremelycost-effective production of 500,000 t ofstainless-steel strip per year. The slimlinework rolls are supported at the sides toabsorb the strong horizontal forces. Theyare driven by axially adjustable intermedi-ate rolls.

Versatile as well as efficient, the tandemmill can process both hot and cold strip of AISI series 300 and 400. It producesstainless-steel strip in widths of up to

POSCO, Korea

1,350 mm and a minimum final thicknessof 0.4 mm. The maximum ingoing thick-ness is 5.0 mm.

Optimized with T-roll®. Applying our T-roll®

process model, we set the plant parame-ters and calculated the optimal tempera-ture pattern in the rolled material. This isalso how we determined other factorssuch as suitable cooling and lubricationstrategies to ensure maximum passreductions under stable roll-gap condi-tions, and to limit the coiling temperatureto a maximum of 100 °C.

Equipment in the entry and exit areas.The entry area of the continuous tandemmill consists of a payoff reel, a weldingmachine, and a horizontal looper. Alsocontracted to equip the run-out area, wesupplied two coilers with continuouspaper feed, a drum shear, and our inte-grated Rotary Inspect strip inspection line.There is no need to interrupt the processfor wrapping, because the carousel-type paper winder ensures continuousoperation, including automatic paper rollchanging.

Inline inspection with Rotary Inspect.Rotary Inspect is an innovative qualityassurance system that facilitates inlineinspection of the rolled strip. It comeswith several advantages over conven-tional inspection devices. Possibly themost impressive is that strip samples can be taken at rolling speeds of up to100 meters per minute. Once the samplehas been clamped into place, no furthermanual handling is necessary. Theergonomically designed inspection plat-form enables easy, reliable examination of both sides of the strip.

18-HS STANDS

Tandem mill.

53

FOUR 18-HS MILL STANDS

18-HS ZR 613 A - 52”

Commissioning 2009

Production data




Strip thickness

ingoing max. 5.0 mm


Coil weight 40,000 kg

Technical data

Stand type 18-HS ZR 613 A - 52“

Rolling speed 400 m/min. outgoing


Strip tension max. 500 kN (ingoing)


Technical features



- Intermediate roll shifting system

- Intermediate roll bending system


- Mathematical model for presetting allrolling parameters


- Carousel-type paper winder

- Drum shear in the exit area

- Integrated strip inspection in the exit area

Roll set of 18-HS mill stand.

Tandem mill.

18-HS Stands

18-HS stand for stainless-

steel strip

To supplement its two 20-high standsfrom SMS group, Yieh United Steel Corporation contracted us to supply an18-high cold-rolling mill. It’s a new typeof stand SMS has added to its portfolioof state-of-the-art mill stand technology.

A special feature of the 18-HS design arethe slim work rolls with a diameter of120 mm. There is also horizontal supportprovided by adjustable supporting rollerbridges. This ensures lateral stabilizationof the work rolls during the rollingprocess.

SMS group

54

YIEH UNITED STEEL,Taiwan

Also incorporated in the mill stand are anHS shifting system for the work rolls aswell as an axial shifting and bending sys-tem for the intermediate rolls. All actua-tors or control elements for roll-gap set-ting provide the capability to process awhole range of hot-strip grades into high-quality cold-rolled products. Due to a fullyautomated thickness control system, thestainless-steel strip produced featuresprecise dimensions. All rolling parame-ters are preset by an electronic databasesystem for many different rolling pro-grams and pass schedule strategies.

It’s surprisingly easy to operate mills ofthis type both in reversing mode and asinline stands for rolling scale-affected hotstrip or conventional cold strip. Installedin integrated rolling, annealing, and pick-ling lines, 18-HS roll stands in tandemarrangement comprise the technologicalunit for thickness reduction.

18-HS STANDS

Pre-assembly and functional testing.

Reversing mill for stainless steel in 18-HS design.

18-HS roll set. Precise rolling result due to fullyautomated thickness control.

55

18-HIGH MILL STAND

18-HS ZR 613 A - 52”

Commissioning 2007

Production data

Material stainless-steel hot stripAISI 300 and400 series


Strip thickness

ingoing max. 6.5 mm

outgoing 1.5 mm


Technical data

Stand type ZR 613 A - 52”

Rolling speed max. 500 /min



Capacity 80,000 tpy

Technical features



- Intermediate-roll shifting system

- Intermediate-roll bending system

- Emulsion system for cooling and filteringthe coolant-lubricant used

- Electronic database system for presettingall rolling parameters


“The information provided in this brochure contains a general description of the performance characteristics of the products concerned. The actual products may not always have thesecharacteristics as described and, in particular, these may change as a result of further developments of the products. The provision of this information is not intended to have and willnot have legal effect. An obligation to deliver products having particular characteristics shall only exist if expressly agreed in the terms of the contract.”

SMS group GmbH

Flat Rolling Plants Division

Wiesenstrasse 3057271 Hilchenbach, Germany

Phone: +49 2733 29-1800Telefax: +49 2733 29-1782

E-mail: [email protected]: www.sms-group.com

SMS group GmbH

Strip Processing and Furnace Technology DivisionTechnical Sales Stainless Steel

Walder Strasse 51-5340724 Hilden, Germany

Phone: +49 211 881-5100Telefax: +49 211 881-5200

E-mail: [email protected]: www.sms-group.com W

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multiroll mill stands

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