Brazing Alloys Reference Chart

Go to section:

 

 
PhosCopper SilverAlloys

AWS A5.8 Aufhauser Product name Nominal Chemical Composition % Solidus/
Liquidus
°F
Flow °F Density
TO/Cu.In
Electrical
Conductivity
(%IACS)
Color AMS Stock Item Description
Ag Cu Zn Other P Ni Sn
BCuP-2 PhosCopper 0 0 92.75 - - 7.25 - - 1310/1460 1350 4.170 7.5 Copper Yellow   Very fluid, fast flow and economical. Used with copper, brass, and bronze base metal with recommended joint clearance .001" to .003".
BCuP-6 PhosCopper 2 2 91 - - 7 - - 1190/1450 1300 4.198 5.5 Light Copper   Silver addition lowers solidus temperature, not as fluid as PhosCopper 0, gap clearance .001" to .003".
BCuP-3 PhosCopper 5 5 89 - - 6 - - 1190/1495 1325 4.284 9.6 Light Copper   Used when gap clearance range is .003 to .006". Ideal for larger copper pipe sizes.
BCuP-7 PhosCopper 5HP 5 88.25 - - 6.75 - - 1190/1420 1300 4.231   Light Copper   For copper, brass or bronze. Slightly more fluid than PhosCopper 5 and PhosCopper 15. Used as preform rings for heat exchangers.
- PhosCopper 6D 6 87.9 - - 6.1 - - 1190/1440 1465 4.289 8.8 Light Copper   Developed to mimic performance of the PhosCopper 15 alloy at lower cost.
BCuP-4 PhosCopper 6HP 6 86.75 - - 7.25 - - 1190/1325 1275 4.202   Light Copper   Reasonably fluid, similar to PhosCopper 0 in joint clearance of .001 to .003". Ideal flow as preform.
BCuP-5 PhosCopper 15 15 80 - - 5 - - 1190/1475 1300 4.415 9.9 Light Copper   Reasonably fluid, similar to PhosCopper 0 in joint clearance of .001 to .003". Ideal flow as preform.
- PhosCopper 18M 18 75.75 - - 6.25 - - 1190/1220 1220 4.45   Light Yellow   Inquire Automatic brazing of copper and copper products.

 
Cadmium-Bearing SilverAlloys

AWS A5.8 Product name Nominal Chemical Composition % Solidus/
Liquidus
°F
Flow °F Density
TO/Cu.In
Electrical
Conductivity
(%IACS)
Color AMS Stock Item Description
Ag Cu Zn Other P Ni Sn
BAg-27 SilverAlloy Cd-25 25 35 26.5 13.5 Cd - - - 1125/1375 1375 4.71 29.7 Light Yellow   Inquire Less silver than SilverAlloy Cd-30 at the expense of increased melt temperature and range.
BAg-33 SilverAlloy Cd-25L 25 30 27.5 17.5 Cd - - - 1125 1260 4.538   Light Yellow   Inquire Similar to SilverAlloy Cd-25 but requires better heat control. Reduced melt range but more prone to oxidation.
BAg-2a SilverAlloy Cd-30 30 27 23 20 Cd - - - 1125/1310 1310 4.618 31 Light Yellow   Less silver than SilverAlloy Cd-35 at the expense of increased melt temperature and range.
BAg-2 SilverAlloy Cd-35 35 26 21 18 Cd - - - 1125/1295 1295 4.84 28.5 Light Yellow 4768 Broader melt range than SilverAlloy Cd-45. Suitable for larger gap clearance and easier filleting.
BAg-1 SilverAlloy Cd-45 45 15 16 24 Cd - - - 1125/1145 1145 4.96 27.6 Light Yellow 4769 Lowest melting range in joining ferrous, non-ferrous and dissimilar metals with close joint clearance requirement.
BAg-1a SilverAlloy Cd-50 50 15.5 16.5 18 Cd - - - 1160/1175 1175 4.98 23.9 Light Yellow 4770 Similar to SilverAlloy Cd-45 properties with narrower melt range. Used on same base metals.
BAg-3 SilverAlloy Cd-50Ni3 50 15.5 15.5 16 Cd - 3 - 1170/1270 1270 5.02 18 Light Yellow 4771 Similar to SilverAlloy Cd-45 properties with narrower melt range. Used on same base metals.

 
Cadmium-Free SilverAlloys

AWS A5.8 Product name Nominal Chemical Composition % Solidus/
Liquidus
°F
Flow °F Density
TO/Cu.In
Electrical
Conductivity
(%IACS)
Color AMS Stock Item Description
Ag Cu Zn Other P Ni Sn
- SilverAlloy A-20 20 45 35 - - - - 1315/1500 1500 4.451   Brass Yellow   Inquire Excellent temperature match to heat treatment of carbon steels. Good color match to yellow brass assemblies.
- SilverAlloy A-25 25 52.5 22.5 - - - - 1250/1575 1565 4.623   Brass Yellow   Inquire Less silver than SilverAlloy A-30 at the expense of increased melt temperature and range. Moderate ductility.
BAg-37 SilverAlloy A-25T 25 40 33 - - - 2 1210/1435 1420 4.485   Light Yellow   Inquire Least silver of the Ag-Cu-Zn-Sn family. Moderate ductility limits joint design and application.
BAg-20 SilverAlloy A-30 30 38 32 - - - - 1250/1310 1410 4.547 24.4 Light Yellow   Good for HVAC assemblies where higher temperatures can be employed. Good for copper, nickel-silvers, and other non ferrous alloys.
BAg-35 SilverAlloy A-35 35 32 33 - - - - 1260/1390 1382 4.568 22.0 Light Yellow   Dissimilar metals brazing in refrigeration tubing. Moderate melt temperature for ferrous and non-ferrous alloys.
BAg-34 SilverAlloy A-38T 38 32 28 - - - 2 1200/1330 1330 4.624 18.0 Light Yellow 4761 Similar melt temperatures to cadmium-bearing SilverAlloy Cd-30 and SilverAlloy Cd-35. Suitable for ferrous and non-ferrous metals.
BAg-4 SilverAlloy A-40Ni2 40 30 28 - - 2 - 1240/1435 1435 4.658   Light Yellow   Good corrosion properties with stainless steels. Often used in joining of tungsten carbides.
- SilverAlloy A-40L 40 30.5 29.5 - - - - 1245 1340 4.641   Yellow   Inquire Narrower melt range suitable for furnace brazing of steel, nickel, copper alloys. Good ductility.
BAg-28 SilverAlloy A-40T 40 30 28 - - - 2 1200/1310 1310 4.638 18.0 Light Yellow   Intermediate melt temperatures of the tin containing family. Used in joining ferrous and non ferrous.
BAg-5 SilverAlloy A-45 45 30 25 - - - - 1225/1370 1369 4.728 19.0 Yellow White   General purpose alloy for brazing of ferrous and non-ferrous metals. Excellent replacement to Cd containing alloys.
BAg-36 SilverAlloy A-45T 45 27 25 - - - 3 1195/1251 1251 4.85 18.0 Pale Yellow   Good for dissimilar metals with moderate flow characteristics.
  SilverAlloy A-49NiMn 49 16 23 7.5 Mn - 4.5 - 1260/1290 1290 4.876   Yellow White   A-49NiMn is often employed when you braze a large carbide tool insert. Also appropriate for joining porous sintered parts and wire mesh screens. Good for brazing aluminum bronze to steel.
BAg-6 SilverAlloy A-50 50 34 16 - - - - 1270/1425 1425 4.876   Yellow White   Widely used for electrical applications and in joining dissimilar metals.
BAg-24 SilverAlloy A-50Ni2 50 20 28 - - 2 - 1220/1305 1305 4.726 15.0 White 4788 Used with 300 series stainless in Food, Medical and Dental fields. Good Cd free alternative for SilverAlloy Cd-50Ni3 in carbide brazing.
  SilverAlloy A-50T 50 22 25 - - - 3 1190 1230 4.8   Pale Yellow   Similar to SilverAlloy A-56T at expense of increased melt temperature and range.
BAg-13 SilverAlloy A-54Ni1 54 40 5 - - 1 - 1325/1575 1575 5.054 49.8 White 4772 Low zinc suitable for furnace brazing. Good for elevated service temperatures to 700°F. Used for carbon assemblies.
BAg-7 SilverAlloy A-56T 56 22 17 - - - 5 1145/1205 1205 4.850 11.9 White 4763 Low zinc suitable for furnace brazing. Good for elevated service temperatures to 700°F. Used for carbon assemblies.
  SilverAlloy A-60 60 25 15 - - - - 1245 1345 4.964   White   Inquire Similar to SilverAlloy A-65. Good for nickel and silver alloys.
BAg-9 SilverAlloy A-65 65 20 15 - - - - 1240 1325 5.003   White   Inquire Third lowest melt alloy of the "Silversmith Alloys". Good color match to silver.
BAg-10 SilverAlloy A-70 70 20 10 - - - - 1275 1360 5.112   White   Inquire Used on sterling silver, next lower melt temperature below SilverAlloy A-75 in step brazing.
  SilverAlloy A-75 75 22 3 - - - - 1365 1450 5.255   White   Inquire Used on sterling silver. Excellent color match to silver, highest melting of "Silversmith Alloys".
  SilverAlloy Z-75 75 - 25 - - - - 1300 1345 5.06   White   Inquire Joining of steel and stainless steel assemblies that come into contact with ammonia (NH3).

 
Cadmium/Zinc-Free SilverAlloys

AWS A5.8 Product name Nominal Chemical Composition % Solidus/
Liquidus
°F
Flow °F Density
TO/Cu.In
Electrical
Conductivity
(%IACS)
Color AMS Stock Item Description
Ag Cu Zn Other P Ni Sn
  SilverAlloy B-7T 7 85 - - - - 8 1225 1805 4.683   Yellow   Inquire Good for vacuum and atmosphere brazing. A replacement to copper braze when lower melt temperature is required.
BAg-13a SilverAlloy B-56Ni2 56 42 - - - 2 - 1420 1640 5.14   White 4765 Good for elevated application to 700°F. Low zinc content reduces zinc deposit within furnace during brazing operation.
BAg-18 SilverAlloy B-60T 60 30 - - - - 10 1115 1325 5.048   White 4773 Inquire Good for elevated application to 700°F. Low zinc content reduces zinc deposit within furnace during brazing operation.
BAg-8 SilverAlloy B-72 72 28 - - - - - 1435/1435 1435 5.275 87 White   Good for atmosphere and vacuum furnace brazing of ferrous and non-ferrous alloys. Used in critical electronic and aerospace brazements.
  SilverAlloy B-72Ni 71.5 28 - - - 0.5 - 1435 1450 5.270   White   Inquire Similar to SilverAlloy B-72 Cd Free with nickel addition to impart improved corrosion properties with stainless steel.

 
SilverAlloys Vacuum Grade

AWS A5.8 Product name Nominal Chemical Composition %, Grade 1 (Grade 2) Solidus
(Melt)
°F
Liquidus
(Flow)
°F
Stock Item Description
Ag Cu Sn Pd In Zn Cd Pb P C
BVAg-18 SilverAlloy BV-60 60 30 10 - - < 0.001
(< 0.002)
< 0.001
(< 0.002)
< 0.002
(< 0.002)
< 0.002
(< 0.02)
< 0.005
(< 0.005)
1112 1328 Inquire Special alloy with very low level of impurities for vacuum brazing.
BVAg-29 SilverAlloy BV-61 61 24 - - 14.5 < 0.001
(< 0.002)
< 0.001
(< 0.002)
< 0.002
(< 0.002)
< 0.002
(< 0.02
)
< 0.005
(< 0.005)
1166 1301 Inquire Moderate temperature low pressure systems, in particular the electronic vacuum tube.
BVAg-30 SilverAlloy BV-68 68 27 - 5 - < 0.001
(< 0.002)
< 0.001
(< 0.002)
< 0.002
(< 0.002)
< 0.002
(< 0.02)
< 0.005
(< 0.005)
1461 1497 Inquire For use on ferrous/ non-ferrous alloys; for brazing metallized ceramics to nickel-cobalt-iron assemblies, or joining glass to metal seals.
BVAg-8 SilverAlloy BV-72 72 28 - - - < 0.001
(< 0.002)
< 0.001
(< 0.002)
< 0.002
(< 0.002)
< 0.002
(< 0.02)
< 0.005
(< 0.005)
1436 1436 Inquire For strong, robust, integral joints: aeronautical applications, linear-beam vacuum tubes, power supply surge protectors, automotive parts.

 
Layered SilverAlloys

AWS A5.8 Product name Nominal Chemical Composition % Solidus/
Liquidus
°F
Flow °F Density
TO/Cu.In
Electrical
Conductivity
(%IACS)
Color AMS Stock Item Description
Ag Cu Zn Other P Ni Sn
  Layermet A-40Ni2 40 30 28 - - 2 - 1220 1435         Similar to Layermet A-50Ni2 with higher brazing temperature, also exhibit good strength and wetting action on carbide.
  Layermet A-40Ni5               1220 1580         Inquire Similar to Layermet A-40Ni2 with higher nickel for strength and corrosion resistance.
  Layermet A-49NiMn 49 16 23 7.5 Mn - 4.5 - 1260 1290         Layermet A-49NiMn is often employed when you braze a large carbide tool insert. Also appropriate for joining porous sintered parts and wire mesh screens. Good for brazing aluminum bronze to steel.
  Layermet A-50Ni2 50 20 28 - - 2 - 1220 1305         A popular cadmium-free tri-layered silver-copper-silver strip in 1/2/1 ratio that delivers superb performance in carbide brazing applications.
  Layermet Cd-50Ni3 50 15.5 15.5 16 Cd - 3 - 1170 1270         A cadmium bearing Layermet with exceptional strength, flow characteristics, and extremely low brazing temperature.