brazing & metal joining solutions

Brazing & MetalJoining Solutions

p r i n c e i z a n t . c o m

USA I IRELAND I FRANCE I GERMANY I CHINA I TAIWAN I INDIA

P&I BRAZING BROCHURE | 2018

Prince & Izant Company provides precious metal and brazing alloy solutions to our global customers, helping them create diverse products used throughout the world. We are committed to investing in the equipment, talent, and other resources necessary to provide our customers with a world-class experience.

CUSTOMER FOCUSED, SOLUTION DRIVEN.


TA B L EO F C O N T E N T S

# TITLE PAGE

I. Products, Applications, and Manufacturing Capabilities 03

II. Metal Joining Chart for Common Base Metals 04

III. Gold Brazing Alloys 05

IV. Silver Brazing Alloys (Cadmium-Free) 06

V. Silver Brazing Alloys (Cadmium-Bearing) 07

VI. Silver-Phosphorus (Silverphos) Brazing Alloys 08

VII. Copper Brazing Alloys 09

VIII. Nickel Brazing Alloys and Aluminum Brazing Alloys 10

IX. Vacuum Grade (VTG) Brazing Alloys 11

X. Active Brazing Alloys 12

XI. Prince & Izant Worldwide Locations 13


P R I N C E & I Z A N T P R O D U C T SA N D A P P L I C AT I O N S

COMMON MANUFACTURING CAPABILITIES

● 3

WIRE ROD STRIP PASTE POWDER RINGS STAMPINGS

Gold

.0008” - .075” DIAMost Common.059”.040”.032”.020”.010”

.02” - .07” DIA18” – 71” Length

001” - .064” ThickCommon Widths.010” – 6”

82%-90% Metal LoadCommon Mesh Sizes140 mesh200 mesh325 mesh400 mesh

100, 140, 325 mesh sizes

ID Rings, butt-end.067” – 6” ID.007” – .059” DIA wireID Rings, gap.05” – 3.9” ID.0025” – .045” DIA wireID Rings, multi-turn.032” – 1.96” ID.005” – .030” DIA wireOD Rings, butt-end.11” – 1.76” OD.01” – .049” DIA wireOD Rings, gap.235” – 1.55” OD.015” – .043” DIA wire

Smallest.016” OD - .009” IDLargest2.5” OD – 2.25” OD

Silver

.01” - .25” DIAMost Common.093”.062”.047”.031”

Rod – Round .03” - 1.25” DIA18” - 36” LengthRod – Square .05” - .125” Thick.06” – 1.25” Width18” – 36” Length

.0005” - .04” ThickCommon Widths.010” – 6”

65%-90% Metal LoadCommon Mesh Sizes100,140, 200, 325, 400

ID Rings, butt-end.011” – 6.751” ID.0053” – .05” DIA wireOD Rings, butt-end.102” – 2.5” OD.010” – .094” DIA wire


Silverphos

Rod – Square .05” - .125” Thick.06” – .125” Width18” – 36” LengthRod – Round .062” - .125” DIA18” - 36” Length


60, 100, 140, 200, 250, 270, 325, 400 mesh sizes

Copper

.005” - .1325” DIAMost Common.16”.1325”.062”.045”

Rod – Round .047” - 1.25” DIA.8” - 36” LengthRod – Square .042” - .125” Thick.125” – .325” Width


76%-90% Metal LoadCommon Mesh Sizes100, 140, 325

140, 325 mesh sizes

OD Rings, butt-end.232” – 10.185” OD.015” – .1575” DIA wireID Rings, butt-end.019” – 3.125” ID.010” – .116” DIA wireID Rings, gap.197” – 5.85” ID.023” – .07” DIA wire


NickelRod – Round .02” - .63” DIA12” - 36” Length

.0015” - .003” ThickCommon Widths.175” – 8.5”

70%-90% Metal LoadCommon Mesh Sizes120, 140, 270, 325

140, 230, 270, 325, 400 mesh sizes


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WIRE ROD STRIP PASTE POWDER RINGS STAMPINGS

Gold

.0008” - .075” DIAMost Common.059”.040”.032”.020”.010”

.02” - .07” DIA18” – 71” Length

001” - .064” ThickCommon Widths.010” – 6”

82%-90% Metal LoadCommon Mesh Sizes140 mesh200 mesh325 mesh400 mesh

100, 140, 325 mesh sizes

ID Rings, butt-end.067” – 6” ID.007” – .059” DIA wireID Rings, gap.05” – 3.9” ID.0025” – .045” DIA wireID Rings, multi-turn.032” – 1.96” ID.005” – .030” DIA wireOD Rings, butt-end.11” – 1.76” OD.01” – .049” DIA wireOD Rings, gap.235” – 1.55” OD.015” – .043” DIA wire


Silver

.01” - .25” DIAMost Common.093”.062”.047”.031”

Rod – Round .03” - 1.25” DIA18” - 36” LengthRod – Square .05” - .125” Thick.06” – 1.25” Width18” – 36” Length


65%-90% Metal LoadCommon Mesh Sizes100,140, 200, 325, 400

ID Rings, butt-end.011” – 6.751” ID.0053” – .05” DIA wireOD Rings, butt-end.102” – 2.5” OD.010” – .094” DIA wire


Silverphos

Rod – Square .05” - .125” Thick.06” – .125” Width18” – 36” LengthRod – Round .062” - .125” DIA18” - 36” Length


60, 100, 140, 200, 250, 270, 325, 400 mesh sizes

Copper

.005” - .1325” DIAMost Common.16”.1325”.062”.045”

Rod – Round .047” - 1.25” DIA.8” - 36” LengthRod – Square .042” - .125” Thick.125” – .325” Width


76%-90% Metal LoadCommon Mesh Sizes100, 140, 325

140, 325 mesh sizes

OD Rings, butt-end.232” – 10.185” OD.015” – .1575” DIA wireID Rings, butt-end.019” – 3.125” ID.010” – .116” DIA wireID Rings, gap.197” – 5.85” ID.023” – .07” DIA wire


NickelRod – Round .02” - .63” DIA12” - 36” Length

.0015” - .003” ThickCommon Widths.175” – 8.5”

70%-90% Metal LoadCommon Mesh Sizes120, 140, 270, 325

140, 230, 270, 325, 400 mesh sizes

BASE METALS TO BE JOINED SOLDERS BRAZING ALLOYS

SOLIDUS°F (°C)

LIQUIDUS °F (°C)

FLUIDITY RATING* FLUX

Copper or Brassto

Copper or Brass

Sn96/Ag4 430 (221) 430 (221) High • Please consult a Prince & Izant Sales RepresentativeSn94/Ag6 430 (221) 535 (279) Medium-High

BCuP-9 1178 (637) 1247 (674) Medium • No flux is required for copper to copper joints with phosphorus-bearing filler metals

• For brass and other copper alloys, use Prince & lzant White Brazing Flux

BCuP-2 1310 (710) 1475 (802) Medium

Silverphos 5 1190 (643) 1500 (816) Low

Silverphos 6 1190 (643) 1465 (796) Low

Silverphos 6HP 1190 (643) 1425 (774) Medium

Silverphos 15 1190 (643) 1480 (804) Low

Copper or Brassto

Steel or Stainless Steel

Sn96/Ag4 430 (221) 430 (221) High • Please consult a Prince & Izant Sales RepresentativeSn94/Ag6 430 (221) 430 (221) High

Silver Braze 56 1145 (618) 1205 (652) High • Prince & lzant White Brazing Flux

• Prince & lzant Black Brazing Flux for Stainless Steel

Silver Braze 38 1120 (660) 1325 (718) Medium-High


Silver Braze 45T 1195 /646) 1265 (685) Medium-High

Steel or Stainless Steelto

Steel or Stainless Steel

Sn96/Ag4 430 (221) 430 (221) High • Please consult a Prince & Izant Sales RepresentativeSn94/Ag6 430 (221) 430 (221) High

Silver Braze 56 1145 (618) 1205 (652) High

• Prince & lzant White Brazing Flux

• Prince & lzant Black Brazing Flux for Stainless Steel


Silver Braze 40Ni2 1120 (660) 1435 (779) Medium-Low


Silver Braze 45T 1195 (646) 1265 (685) Medium-High

Silver Braze 50Ni2 1220 (660) 1305 (707) Medium-High

Steel or Stainless Steelto

Carbides

Not Recommend-ed

Silver Braze 40Ni2 1120 (660) 1435 (779) Medium • Prince & lzant Black

Brazing Flux for Stainless SteelSilver Braze

50Ni2 1220 (660) 1305F /707) Medium-High

Aluminum to Aluminumor

Aluminum to Copper or Brass

orAluminum to Steel or

Stainless Steel

Zn15/Sn85 391 (199) 482 (250) Medium-High• Please consult a

Prince & Izant Sales Representative

AL 718 1065 (574) 1170 (632) Medium-High• Please consult a

Prince & Izant Sales RepresentativeAl88/Si12 1070 (577) 1080 (582) High

P&I WHITE FLUX

P&I BLACK FLUX

• Brazing Filler Metal: BAg, BCuP

• Application: High-Temperature Brazing Flux Paste; Boron-Modified

• Temperature Range: 1050-1800F (565-980C)

• Recommended Base Metals: Ferrous and Non-Ferrous Alloys,

• Brazing Filler Metal: BAg, BCuP

• Application: General Purpose

• Temperature Range: 1050-1600F (565-870C)

• Recommended Base Metals: Ferrous and Non-Ferrous Alloys, Stainless Steels and Copper

METAL JOINING CHART FOR COMMON BASE METALS


G O L D B R A Z I N G A L LOY S

• Resists corrosion

• Excellentflowandwettingproperties

• Produces high strength ductile joints

• Suitable for applications with high service temperature requirements

• The radiopacity of Gold and its alloys facilitate braze joint inspection during Nondestructive testing methods (e.g. X-Ray Inspection)

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P&I PRODUCT

NAME

AWS & AMS COMPOSITION MELTING RANGE+

APPLICATIONSAWS AMS Au Cu Pd Ni

Solidus °F (°C)

Liquidus °F (°C)

Gold Braze 2515 25 37 15 10 1178 (975) 1855 (1013) • Used to braze PCD cutters in Oil + Gas exploration applications

Gold Braze 35623 35 62 3 1814 (990) 1850 (1010)

• Used on nickel, molybdenum and iron based heat resistant alloys

• Used on nickel-cobalt-iron alloys• Used on metallized ceramics• Suitable for larger joint clearances

Gold Braze 3565 BVAu-9 35 65 1810 (988) 1850 (1010)

• Used on common ferrous and non-ferrous alloys

• Exhibits good wetting characteristics on metalized ceramics

Gold Braze 5025 BVAu-7 4784 50 25 25 2015 (1101) 2050 (1121)


• Exhibits good wetting characteristics on high temperature iron and nickel-based alloys such as the stainless steels, A286, Inconel and Inconel X

• Increased level of ductility due to percent of Palladium

Gold Braze 7008 4786 70 8 22 1845 (1007) 1915 (1046)

• Used on ferrous and non-ferrous alloys and super alloys for applications requiring elevated temperatures and service conditions

• Suitable for larger joint clearances• Offersbetteroxidationresistancethan

Au-Cu alloys

Gold Braze 8218 4787 82 18 1740 (949) 1740 (949)

• Used to braze a wide range of high temperature iron and nickel-base alloys

• Eutecticcompositionisveryfluid when molten

Au99.99 99.99 1947 (1064) 1947 (1064)• Widely used in electrical, electronic and

industrial applications• Very ductile and wets most metals

GOLD ALLOY CHARACTERISTICS

Use our asset recovery program to recover the precious metal from your assemblies. Apply the recovered value to future purchases or receive payment.

+ Prince & Izant recommends a brazing temperature of 50o to 100o degrees Fahrenheit above the Liquidus

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PI BRAZING BROCHURE | 2018

S I LV E R B R A Z I N G A L LOY S

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P&I PRODUCT

NAME


APPLICATIONSAWS AMS Au Cu Pd Ni

Solidus °F (°C)

Liquidus °F (°C)

Gold Braze 2515 25 37 15 10 1178 (975) 1855 (1013) • Used to braze PCD cutters in Oil + Gas exploration applications

Gold Braze 35623 35 62 3 1814 (990) 1850 (1010)

• Used on nickel, molybdenum and iron based heat resistant alloys

• Used on nickel-cobalt-iron alloys• Used on metallized ceramics• Suitable for larger joint clearances

Gold Braze 3565 BVAu-9 35 65 1810 (988) 1850 (1010)


• Exhibits good wetting characteristics on metalized ceramics

Gold Braze 5025 BVAu-7 4784 50 25 25 2015 (1101) 2050 (1121)


• Exhibits good wetting characteristics on high temperature iron and nickel-based alloys such as the stainless steels, A286, Inconel and Inconel X

• Increased level of ductility due to percent of Palladium

Gold Braze 7008 4786 70 8 22 1845 (1007) 1915 (1046)

• Used on ferrous and non-ferrous alloys and super alloys for applications requiring elevated temperatures and service conditions

• Suitable for larger joint clearances• Offersbetteroxidationresistancethan

Au-Cu alloys

Gold Braze 8218 4787 82 18 1740 (949) 1740 (949)

• Used to braze a wide range of high temperature iron and nickel-base alloys

• Eutecticcompositionisveryfluid when molten

Au99.99 99.99 1947 (1064) 1947 (1064)• Widely used in electrical, electronic and

industrial applications• Very ductile and wets most metals

P&I PRODUCT

NAME

AWS COMPOSITION MELTING RANGE+

APPLICATIONSAWS Ag Cu Zn Ni Mn Sn Solidus °F

(°C)Liquidus °F

(°C)

Silver Braze 30 BAg-20 30 38 32 1250 (676) 1410 (765)• Possessgoodflowcharacteristics• Found in moderate temperature low pressure

systems

Silver Braze 35 BAg-35 35 32 33 1265 (685) 1390 (754)

• Used to braze ferrous and non-ferrous base metals

• Used frequently for production brazing applications

Silver Braze 38 BAg-34 38 32 28 2 1200 (649) 1330 (721) • Free-flowing

Silver Braze 40 BAg-28 40 30 28 2 1200 (649) 1310 (710) • Free-flowingandlowerbrazingtemperaturewitha relatively narrower melting range.

Silver Braze 40Ni2* BAg-4 40 30 28 2 1240 (671) 1435 (779)

• Intermediate temperature brazing alloy used on stainless steels, mild steels, cast and malleable irons and various non-ferrous alloys

• Used extensively in brazing of carbide tips

Silver Braze 45T BAg-36 45 27 25 3 1195 (646) 1251 (677) • Free-flowinglowtemperaturefillermetalusedincadmium-free applications - T = Tin

Silver Braze 45 BAg-5 45 30 25 1225 (663) 1370 (743)• General purpose used in the brazing of tubular

assemblies in ship construction, instrument manufacturing, aircraft engine oil coolers and etc.

Silver Braze 49Ni4* BAg-22 49 16 23 4.5 7.5 1260 (680) 1290 (699)• Low temperature and good strength• Common applications: inserts, cutting tools,

drilling bits, etc.

Silver Braze 50Ni2* BAg-24 50 20 28 2 1220 (660) 1305 (707)

• Free-flowingandreadilywetsnickelandironbased alloys

• Recommended for joining 300 stainless steel • Delays interface corrosion in most exposures• Used often for food handling equipment and

tungsten carbide inserts

Silver Braze 56 BAg-7 56 22 17 5 1145 (618) 1205 (651)• Lowtemperatureandfree-flowing• Tendency to liquate if heated slowly through its

melting range

Silver Braze 63 BAg-21 63 29 6 1275 (690) 1475 (801)

• Low temperature for use on 200, 300 and 400 series stainless steels for maximum resistance to interfacial corrosion

• Sluggish because of it's wide melting range• Will bridge wide or irregular clearances

Silver Braze 72 BAg-8 72 28 1435 (779) 1435 (779)

• Usually used on copper or copper alloys• Suitable for furnace brazing in a protective

atmospherewithouttheuseofaflux• Veryfluidandmayflowoutoverworkpiece

surfaces during some furnace brazing applications

• Also used on stainless steel, carbon steel and nickel based alloys

SILVER ALLOY CHARACTERISTICS

Versatile: Used for brazing steel, brass, bronze, nickel, and copper alloys as well as ferrous and non-ferrous metals (except for aluminum manganese).

Some silver alloys are available as trimetals. Trimetals are clad stripwithfillermetalsbondedtobothsidesofacoppercore.

+ Prince & Izant recommends a brazing temperature of 50o to 100o degrees Fahrenheit above the Liquidus * Alloy also available as Trimetal


8

S I LV E R B R A Z I N G A L LOY S ( C A D M I U M - B E A R I N G )

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P&I PRODUCT

NAME


APPLICATIONSAWS AMS Ag Cu Zn Cd Ni Solidus °F

(°C)Liquidus °F

(°C)

Silver Alloy 30 BAg-2a 30 27 23 20 1125 (607) 1310 (710)• Low temperature used to join

ferrous and non-ferrous metals• Tendency to liquate when heated

slowly

Silver Alloy 35 BAg-2 4768 35 26 21 18 1125 (607) 1295 (701)

• Low temperature used to joinferrous and non-ferrous metals

• Good fatigue strength• Ability to make leak-tight joints

where close clearances cannot bemaintained

Silver Alloy 45 BAg-1 4769 45 15 16 24 1125 (607) 1145 (618)

• Lowest brazing temperaturerange of BAg alloys

• Flows freely into tight capillary joints

Silver Alloy 50Ni3* BAg-3 4771 50 15.5 15.5 16 3 1170 (632) 1270 (688)

• ModificationofBAg-1acreatedwith addition of nickel

• Good corrosion resistance inmarine applications

• Nickel content improvesalloy wettability

• Largest use is in the brazing of carbide tool assemblies.

Silver Alloy 50 BAg-1a 4770 50 15.5 16.5 18 1160 (627) 1175 (635)• Used for low temperature

applicationswherefree-flowingfillermetalsaredesired

P&I PRODUCT

NAME


APPLICATIONSAWS Ag Cu Zn Ni Mn Sn Solidus °F

(°C)Liquidus °F

(°C)

Silver Braze 85 BAg-23 85 15 1760 (960) 1780 (970)

• High-temperatureandfree-flowing• Used in torch and protective atmosphere furnace

brazing• Used in the brazing of stainless steel, nickel-

based alloys and cobalt-based alloys for high-temperature applications

Silver Braze 92.5 BAg-19 92.5 7.27 1400 (760) 1635 (891)• Used for higher brazing temperature applications

in which brazing and precipitation-hardening heattreating are combined. Contains 0.23% Li

Pure Silver BVAg-0 1763 (962) 1763 (962)• Widely used in the electrical and electrical

manufacturing industries as contacts andconductors. Provides strong, ductile joints withgood corrosion resistance

WARNING

Cadmium is a known carcinogen and exposure to cadmium fumes may result in cancer and other hazardous side effects.

SILVER (CADMIUM BEARING) ALLOY CHARACTERISTCS

• Versatile: used on nearly all nickel, iron/steel and copper based alloys

• High strength

• Lowest melting point of all silver-based brazing alloys

+ Prince & Izant recommends a brazing temperature of 50o to 100o degrees Fahrenheit above the Liquidus* Alloy also available as Trimetal



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P&I PRODUCT

NAME


APPLICATIONS

AWS Ag Cu P Solidus °F (°C) Liquidus °F (°C)

Silverphos 2 BCuP-6 2 91 7 1190 (643) 1450 (788)

• Self-fluxingoncopper• Goodflowandwettingoncopper,brassand

bronze• Sluggishflowatlowendofbrazingtemperature

rangewhichallowsforgapfill• Fluid at high end of brazing temperature range

whichisidealfortight-fightingjoints

Silverphos 5 BCuP-3 5 89 6 1190 (643) 1495 (813)

• Primarily used for brazing Cu connections in industrial and domestic heat exchangers

• Copper-Copper joints• Usedwhenveryclosefitscannotbeheld

Silverphos 6HP BCuP-4 6 87 7 1190 (643) 1325 (718) • Extremelyfluidatbrazingtemperature• Able to penetrate joints with small clearances

Silverphos 15 BCuP-5 15 80 5 1190 (643) 1475 (802) • Copper to copper joints• Recommended for delicate work

Silverphos 18M 18 76 6 1190 (643) 1275 (690)

• Ternary eutectic and low temperature brazing fillermetal

• Freeflowingandself-fluxingoncopperandsome high copper and copper alloys

• Usedonassemblieswheregoodfit-upcanbemaintained

S I LV E R P H O S A L LOY S( S I LV E R - P H O S P H O R U S )

PHOSPHORUS AND THE EFFECTS IT HAS WHEN ALLOYED WITH SILVER-COPPER

• Silverphosalloysareself-fluxingwhenusedtojoincoppertocopper.Theself-fluxingcharacteristicsofSilverphosalloysoccursbecausethephosphoruselementcontentpossessesagreateraffinityforoxygenthanforthecopper.

• Lowers the melt temperature of copper thus acting as a temperature depressant

• Increasesoverallfluidityofcopperwhenintheliquidstate

• Lowers ductility of copper

SILVER-PHOSPHORUS ALLOY CHARACTERISTICS

• Primarily intended for copper to copper or copper to brass

• Strong resistance to corrosion

• Phosphorus presence renders alloyself-fluxingthusthesealloysdonotrequireafluxwhenusedtobrazecopper to copper

• Promote electrical conductivity

• Silvercontentinfluencesfluidityandimprovesoverallductilityofthebrazingalloy



C O P P E R B R A Z I N G A L LOY S

● 9

P&I PRODUCT

NAME


APPLICATIONSAWS Cu Ni Zn Solidus °F (°C) Liquidus °F (°C)

CDA 773 RBCuZn-D 48 10 41 1690 (921) 1715 (935)• Used for the brazing of tungsten

carbide, steel, nickel and nickel based alloys

X-55 55 6 35 1634 (890) 1688 (920)

• Modifiednickelsilverwith moderate strength

• Excellent plasticity in molten state• Gapfilling• For carbides, stainless steels, tool

steels and nickel alloys

CDA 521 92 1620 (882) 1880 (10)• Typically used in furnace brazing of steels

where use of pure copper is not permissible• Contains 8% Sn

CDA 102 BCu-3 99.95 1981 (1083) 1981 (1083)

• Oxygen-free(OFE/OFHC),free-flowingalloyused in joining of ferrous, nickel-based alloys and copper-nickel alloys

• Often used in furnace brazing with protective atmosphere or partially combusted natural gas, hydrogen, dissociated ammonia or nitrogen-baseatmospheregenerallywithoutflux

CDA 110 BCu-1 99.9 1981 (1083) 1981 (1083)

• Fluidfillermetalusedforbrazing ferrous and nickel based alloys in particular steel, stainless steel and copper-nickel alloys

• This alloy is commonly used in furnace braze applications without theuseofflux

COPPER ALLOY CHARACTERISTICS

• Generally used for brazing of carbon and alloy steels, stainless steel, nickel and copper-nickel

• Excellent corrosion resistance

• High electrical and thermal conductivity

CUPASTE COPPER BRAZING PASTE

Prince&Izant’sCUPASTEproductlineisdesignedtofulfilltheneedsofcustomer furnace brazing applications

When and why customers use copper paste over copper preforms:

• Versatile - In some instances, joint orientation may not be conducive to preform placement (ex. on a vertical plane)

• Complex Geometry - In certain situations, paste can help eliminate expensive tooling and non-recurring engineering charges

• Capillary Kicker - Used when larger than ideal gaps exist between the preform and the entrance of the braze joint

• Low Fabrication Costs

+ Prince & Izant recommends a brazing temperature of 50o to 100o degrees Fahrenheit above the Liquidus * CDA stands for Copper Development Association


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N I C K E L B R A Z I N G A L LOY S

P&I PRODUCT

NAME


APPLICATIONSAWS AMS Ni Si Cr B Fe Solidus °F

(°C)Liquidus °F

(°C)

AMS 4782 BNi-5 4782 71 10 19 1975 (1065) 2075 (1135)

• Good choice for narrow, deep joints or honeycomb components.

• High chrome content is a plus for components that will endure corrosive or oxidation service conditions.

AMS 4777 BNi-2 4777 82 4.5 7 3 1780 (971) 1830 (999)

• Mostwidelyusedofnickelfillermetals• Excellent oxidation and corrosion

resistance• Used in the manufacturing of food

handling equipment, jet engine components, nuclear energy assemblies and carbide tools

AMS 4778 BNi-4 4782 92 4.5 3 1800 (982) 1900 (1038)

• Exhibits high temperature joint strength, oxidation resistance, corrosion resistance and abrasion resistance

• Typical applications include structural members in jet engines, turbines, chemical processing and nuclear equipment requiring lower temperature/heat treatment temperatures

• Used when applications require corrosion resistance

• Used in high-temperature service applications

NICKEL ALLOY CHARACTERISTICS

P&I PRODUCT

NAME


APPLICATIONSAMS AMS Al Si Solidus °F

(°C)Liquidus °F

(°C)

AL 718 BAlSi-4 4185 88 12 1070 (577) 1080 (582)• General purpose used with all brazing processes

requiringafree-flowingfillermetalandgoodcorrosionresistance

A LU M I N U M B R A Z I N G A L LOY S

Aluminumbrazingfillermetalsareusedtojoinbrazeablealuminum base metals. Silicon and copper are typically added to pure aluminum to lower melting range and provide a suitable joining material. Magnesium can also be added to aluminum to facilitate oxide dispersion in vacuum brazing.

ALUMINUM ALLOY CHARACTERISTICS

+ Prince & Izant recommends a brazing temperature of 20o to 25o degrees Fahrenheit above the Liquidus Please take into consideration the melt temperature of your base components and adjust the brazing temperature accordingly



VA C U U M G R A D E A L LOY S ( V T G )

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P&I PRODUCT

NAME


APPLICATIONSAWS Au Cu Pd Ni Solidus °F

(°C)Liquidus °F

(°C)

Gold Braze 3565

BVAu-9 35 65 1814 (990) 1850 (1010)• Generally used in reducing, vacuum or inert atmosphere• Alloy exhibits good wetting characteristics on metallized

ceramics

Gold Braze 5025

BVAu-7 50 25 25 2015 (1102) 2050 (1121)

• Used on common nickel, molybdenum, tungsten and iron base heat resistant alloys

• Used in applications requiring high oxidation resistance and high strength at elevated temperatures

Gold Braze 5050

BVAu-10 50 50 1751 (955) 1778 (970)

• Generally used in reducing, vacuum or inert atmosphere• Gold Braze 5050 is less ductile than standard Au/Cu/Ni

alloys• Composition allows for use in applications where braze

fillermetalslowinvolatileconstituentsarerequired• Alloyexhibitsfree-flowingcharacteristics

Gold Braze 8218

BVAu-4 82 18 1742 (950) 1742 (950)

• Wets a wide range of high temperature iron and nickel-based alloys

• Typical applications include brazing of electron tubes, vacuum tubes and waveguides

PAL 5 BVAg-30 68 27 5 1485 (806) 1490 (809)

• Used on common ferrous and non-ferrous alloys• Suitable for use in all vacuum applications

due to its low vapor pressure• Often used in metalized-ceramic to

nickel-cobalt-iron assemblies

PAL 10 BVAg-31 58 32 10 1515 (823) 1565 (851)• Low vapor pressure makes it suitable for use in all vacuum

applications• Often used in the brazing of metallized ceramics

PAL 15 65 20.3 1562 (850) 1652 (900)• Low vapor pressure makes it suitable for use in all vacuum

applications• Often used in the brazing of metallized ceramics

• TheAmericanWeldingSociety(AWS)definesvacuum-gradealloysas“controlledbrazingfillermetalsusedinfabricationof high-quality electronic devices when the service life and operating characteristics are of prime importance” —Theletter“B”denotesbrazingfillermetal — The letter “V” stands for vacuum —Ingeneral,“BV”denotesbrazingfillermetals for a vacuum furnace

• Vacuum grade brazing alloys are free of high-vapor-pressure elements and are manufactured to maintain impurities at low levels

• Vacuum grade brazing alloys are used to fabricate vacuum tubes for electronic devices for which service life and operating characteristics are of prime importance

VACUUM GRADE ALLOY CHARACTERISTICS GRADE 1 V. GRADE 2

Elements detected that have a vapor pressure higher than 10-7 torr (1.3 x 10-5 Pa) at 932F (500C) are limited to 0.001% eachforGrade1fillermetalsand0.002%eachforGrade2fillermetals.Thetotalof all high vapor pressure elements (including zinc, cadmium and lead) is limited to 0.010%. The total of all other impurity elements is 0.01% maximum for Grade 1 and 0.05% maximum for Grade 2. Please be sure to specify when placing and order for Vacuum Grade materials.

+ Prince & Izant recommends a brazing temperature of 50o to 100o degrees Fahrenheit above the Liquidus See princeizant.com for impurity limits



A C T I V E B R A Z I N GA L LOY S

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P&I PRODUCT

NAME

CROSS REFERENCES COMPOSITION MELTING RANGE+

APPLICATIONSMorgan/Wesgo Ag Au Cu In Ti Ni Solidus °F (°C) Liquidus °F (°C)

APA 10b 96 4 1945 (1062) 1947 (1063)

Active Braze Alloys are designed for brazing ceramics to metals

as well as other non-metallic components without the need for

prior metallization of the contact surface

APA 10 Gold-ABA 96.5 0.6 3 1837 (1002) 1886 (1030)

APA 2 96 4 1780 (971) 1780 (971)

APA 3 Cusil-2-ABA 71 27 2 1436 (780) 1481 (805)

APA 4 Ticusil 68.8 26.7 4.5 1435 (779) 1650 (898)

APA 5 Cusil-ABA 63 1.75 1435 (779) 1500 (815)

APA 6 Cusin-1-ABA 63 1.75 1427 (775) 1483 (806)

APA 7 Incusil-ABA 59 12.5 1.25 1121 (605) 1319 (715)

APA 8 Incusil-15-ABA 14.7 2 1120 (604) 1335 (723)

APA 9 Incusil-25-ABA 43.6 29.1 24.3 3 1119 (603) 1134 (612)

ANA 1 Tini-67 67 33 1730 (947) 1795 (958)

ANA 2 Tini-50 50 50 1760 (960) 1890 (1032)

• ABAs combine braze alloys with active elements to allow for the direct joining of metal to ceramic

• Promote wetting on ceramics

• Indium is used in ABAs to reduce brazing temperature of the alloy

ACTIVE BRAZE ALLOY CHARACTERISTICS

• ABAs must be brazed under deep vacuum or argon – ABAs will readily react with oxygen at higher temperatures and “lose” their active components.

• Avoid rapid heating and cooling – metals expand and shrink faster thanceramics.Thiscancausecrackingandmisconfiguration

• Longer soak time and higher temperatures – a longer soak time at a higher temperature is preferred to generate the initial reaction layer

BRAZING WITH ABAS

ABAs should be brazed in vacuum or argon. If brazed in argon, the vapor pressure of elements such as silver should be taken into consideration when programming the peak temperature. ABAs are best suited for furnaces. Induction can cause uneven heating which leads to cracking of ceramic components. Rapid cool down rates should also be avoided when ceramic is bonded to metal. The fast contraction of metal can put stresses on the ceramic which leads to cracking or residual stress on the braze joint at ambient temperatures.

The soak time at temperature is often extended for ABAs in order to allow the active agent to react with the surface of the ceramic. ABAs cannot be brazed inatmospherewithfluxorundernitrogen.

ACTIVE BRAZE ALLOY CHARACTERISTICS

ELECTRONICS

High-tech circuit boards

ThinfilmchipfusesforLED panel applications

Suppressor components for high frequency applications

Particle accelerators

Optoelectronics

COMMON INDUSTRIES AND MARKETS

MEDICAL

High voltage feedthroughs for x-ray equipment, scanners and imaging applications

Proton therapy for oncology

ALTERNATIVE ENERGY

Solar thermal panels

+ Prince & Izant recommends a brazing temperature of 100o to 150o degrees Fahrenheit above the Liquidus of ABA materials An extended soak time of 30 minutes is generally recommended to further drive a metallurgical reaction between the base components and braze alloyAPA - Active Precious AlloysANA - Active Nickel Alloys


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