corten a steel weather resistant steel

8/13/2019 Corten a Steel Weather Resistant Steel

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COR-TEN,CORTEN A,CORTEN STEEL,A242,A558 GR A,S355JOW,

DIFFERENT TYPE AND GRADES OF CORTEN STEEL.

CORTEN A STEEL / Weathe e!"!ta#t !tee$

Ph%!"&a$ P'(et"e!

Weather resistantsteel

StandardTensile StrengthMPa

Yield StrengthMPa

Elongation in 2 inches(min.) %

CORTEN !S steel "#$&'$ ' 2$

RSM "*+# ndianRail,a-s

"$ min '"$ min 2*

STM STM " MN '" min 2*

Che)"&a$ P'(et"e!

Weatherresistantsteel C Mn P S Si Cr Ni Mo C/

Corten $.*2 $.2$$.$

$.$#$$.*$

$.$'$ $.2$.#

$.$*.2

$.& $.2$.

RS M"* $.*$ $.2$."

$.$#$.**2

$.$'$ $.2$.#2

$.'$."+

$.2$$."+ $.'$$.'+

STM

$.2$ $.#*.'$

$.$" M0 $.$$ $.*$.$

$.'$$$ $.$M0

$.2$$."$

AST* A242-+4 "h-Ste#th L'-a$$'% St&ta$ Stee$

Chemicals Com1osition% Tensile Test

C Mn P S C/ Elongation

T-1e*

$.* Ma *.$$ Ma

t3*+.$ % Min

*+.$3t3'.*$

'.*$3t3*$*.&

4radeThi5ness

(t)mmYield Point6si(N7mm2)

Tensile Strength

6si(N7mm2)

$.*Ma

$.$Ma

$.2$Min

$('")Min #$("$) Min Test Piecen (mm)

"&('*) Min ("&$) Min 489(2$$)4892($)

*2*"2(2+$) min &'("') Min


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Remarks:1 For plates wider than24 in(600mm), the Elongatior requirment is reduce Two Percentagepoints2 For normal thic!ness "#16in($mm), the deduction %rom the speci%ied percentage o%elongation in $ in(200mm) &hall 'e made %or decereses o% the nominal thic!ness 'elow"#16 in($mm) &ee elongation requirement adustment under the tension tests section o%

speci%ication 6 %or deduction *alues

S(e&"0"&at"'#! 0' C'te# Stee$ St"( 1 C'"$ a&&'"# t( J"! 325-8SPA- 1 SPA-C6JAPAN STANDA

T-1eS-m:ol

C Si Mn P S C/ Cr NiYield

N7mm2TensileN7mm

SP; $.*2ma

$.2 to$.#

$.2$ to$.$

$.$# to$.*

$."ma

$.2to$.&$

$.'$ to*.2

$.&ma

'"' min "* min

SPC '" min "* min

&tandards

E/ro1eMaterial

no.< = 4> !S ?

Sal@gitter=lachstahl =6

*)

S'?$WP *.+" E '&W '

WR $

ll,esta *$ P >

S'?2WP *.+"& E '&W "

2"2T-1e *

ll,esta *$ =P >

S'?$W *.++ E '&W> ' WR $> SM $W ll,esta *$ >

S'?2W *.+&WTSt2'

E '&W> "

WR $C

SM $

CPll,esta *$ = >

S'6242W *.+ ll,esta *$ =

"$>

1)FK = Tensile strength class

Chemical composition in percent by weight1)[% !"eat analysis)

4rade C Si Mn P S N C/ Cr Ni

ma. ma. ma. ma. ma.

S'?OWP $A*2 $A# ma. *A$$ $A$& $A* $A$' $A$$+') $A2 $A $A'$ *A2 $A&

S'?2WP $A*2 $A# ma. *A$$ $A$& $A* $A$'$ B") $A2 $A $A'$ *A2 $A&

S'?OW $A*& $A$ $A$ *A$ ma. $A$' $A$'$A$$+2)

') $A2 $A $A"$ $A$ $A&

S'?2W $A*& $A$ $A$ *A$ ma. $A$'$ $A$'$ B") $A2 $A $A"$ $A$ $A&

S'62W $A*& $A$ $A$ *A$ ma. $A$'$ $A$'$ B") $A2 $A $A"$ $A$ $A&


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1) The steel ma+ contain a maimum o% 0,6" - .i, 0,/0 - o and 0,1" - r2) Eceeding the speci%ied maimum *alue is permitted i% the phosphorous contentremains 'elow the maimum *alue '+ 0,00" - %or each 0,001 - o% nitrogen howe*er, thenitrogen content must not eceed 0,012 - in the heat anal+sis/) The maimum nitrogen content shall not appl+ i% the steel grades contain at least 0,020- ltotal or su%%icient quantities o% other nitrogen3%iing elements

4) The steel grades contain at least one o% the %ollowing elements ltotal 5 0,020 -, .'0,01" 3 0,060 -, 0,02 3 0,12 -, Ti 0,02 3 0,10 - 7% a com'ination o% these elements ispresent, at least one o% them is contained with the speci%ied minimum content

#echanical properties1)

4radePosition

o

sam1le

Min. -ieldstrength

Tensilestrength

Min. total elongation D%

MPa MPa 8$9 $ mm8$9 A&

FS$

e2)G *& e2)H *& e2)3 ' e2)I ' e2)G 2 2 3 e2)G 2A2A 3

e2)G 'e2)I '

S'?$WP l7t ' *$ &$

"#$ &'$

*&7*" *#7* *7*& 2272$

S'?2WP l7t ' *$ &$

"#$ &'$

*&7*" *#7* *7*& 2272$

S'?$W l7t ' '"*$ &$

"#$ &'$

*&7*" *#7* *7*& 2272$

S'?2W l7t '') '"*$ &$

"#$ &'$

*&7*" *#7* *7*& 2272$

S'62W l7t '') '"*$ &$

"#$ &'$

*&7*" *#7* *7*& 2272$

1) The tensile test *alues gi*en in the ta'le appl+ to longitudinal samples in case o%strip and sheet steel o% widths o% 5 600 mm, trans*erse samples should 'e ta!en2) .ominal thic!ness e 8mm9/) &/"":0;P and &/"":2;P e < 12 mm


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$otch impact energy in condition o deli&ery !minim'm &al'es obtained 'singCharpy( samples)

Gae N't&h ")(a&t e#e%6 P'!"t"'#

? $C

S'?$WP 2# $

S'?2WP 2# 2$

S'?$W 2# $

S'?2W 2# 2$

S'62W "$ 2$

Jerage Jal/es o ' sam1lesK one indiJid/al Jal/e ma- all short o the reL/ired minim/m

Jal/e :- not2)More than '$ %. The sam1le ,idth shall eL/al the 1rod/ct thic5ness i the latter is:et,een *$ mmA')The tests :eing 1erormed /sing sam1les ,hich are similar to Char1- sam1les. TheJal/ess1eciied")n the ta:le a:oJe are to :e red/ced 1ro1ortionall- to the sam1le ,idth.


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COR-TEN, CORTEN, CORTEN A, CORTEN STEEL, A242, A558 GR A,S355JOW,

S&'(eCORTEN a11lies to 1lates /1 to *2.mm in thic5nessA CORTEN > a11lies to 1lates /1 to $mmin thic5ness.

De0"#"t"'#

Weathering means that d/e to their chemical com1ositions CORTEN and CORTEN > steelsA,hen /tilised /n1rotectedA ehi:its increased resistance to atmos1heric corrosion com1ared to/nallo-ed steels. This is :eca/se it orms a 1rotectiJe la-er on its s/race /nder the inl/ence o the,eather.

The corrosion retarding eect o the 1rotectiJe la-er is 1rod/ced :- the nat/re o its str/ct/re

com1onents and the 1artic/lar distri:/tion and concentration o allo-ing elements in it. The la-er1rotecting the s/race deJelo1s and regenerates contin/o/sl- ,hen s/:ected to the inl/ence o the,eather.

=ormationA d/ration o deJelo1ment and 1rotectiJe eect o the coJering la-er on ,eathering steelsde1end largel- /1on the corrosiJe character o the atmos1here. ts inl/ence Jaries and de1endsmainl- /1on general ,eather condition (e.g. continental) macroclimate (e.g. ind/strialA /r:anAmaritime or co/ntr-side climate) and the orientation o the str/ct/re com1onents (e.g. e1osed to orshaded rom the ,eatherA Jertical or hori@ontal 1osition). The amo/nt o aggressiJe agents in the airhas to :e ta5en into acco/nt . n general the coJering la-er oers 1rotection against atmos1hericcorrosion in ind/strialA /r:an and co/ntr-side climate.

When /tilising this steel in /n1rotected condition it is /1 to the designer to ta5e into acco/nt thee1ected loss o thic5ness d/e to corrosion and as ar as necessar-A com1ensate or it :- increasingthe thic5ness o the material.

n cases o 1artic/lar air 1oll/tion :- aggressiJe agents conJentional s/race 1rotection isrecommended. Coating is a:sol/tel- necessar- in cases o contact ,ith ,ater or long 1eriodsA ,hen1ermanentl- e1osed to moist/reA or i it is to :e /sed in the Jicinit- o the sea. The s/sce1ti:ilit- o1aint coats to /ndercree1age :- r/st is less in the case o ,eathering steel than in the case ocom1ara:le non,eathering steel.

A(($"&at"'#!

The corten steel is /sed or Jario/s t-1es o ,eldedA :olted and riJeted constr/ctions e.g. steelrame str/ct/resA :ridgesA tan5s and containersA eha/st s-stemsA Jehicles and eL/i1mentconstr/ctions.

>asic g/idles or the /se o corten steel in the /n1rotected condition are descri:ed in EN *$$2and


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,eather in the /n1rotected condition.

To /se the :eneits o the higher atmos1heric corrosion resistance o CORTEN in com1arison to/nallo-ed steel it is necessar- that design and eec/tion o str/ct/res as ,ell as the 1erormance omaintenance ,or5s allo, an im1eded ormation and regeneration o the 1rotectiJe r/st la-er. Themethods m/st meet the latest reL/irements o technical 1rogress and m/st :e s/ited or the1ro1osed a11lication. G*& ' "#$&'$ 2$

H *& G$ '"

) * M1a 9 *N7mm2

The notched:ar im1act energ- is determined on SO longit/dinal test s1ecimans at a tem1erat/reo 2$QC as an aJerage o three tests. =or 1rod/ct thic5nesses I*$mm the aJerage Jal/e is at least2# ?. =or thic5nesses :et,een *$mm and &mmA the minim/m im1act Jal/e is red/ced


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:'$t"# a# R"et"#

?oining elements s/ch as :oltsA riJets and their accessories (n/ts and ,ashers) m/st :e so selectedthat the ormation o local electrochemical cells are aJoided. The oining elements sho/ld1reera:l- consist o ,eathering steel.

t these oints ca1illar- action can lead to 1ermanent moist/re res/lting in increased corrosion.

Critical @ones sho/ld thereore :e 1rotected :- 1aintingA sealing or other 1rotectiJe meas/res.n the case o highstrength connections (;) the conditions or non,eathering str/ct/ral steels asgiJen in

corten a steel weather resistant steel

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