Table 14.12. Filler Metals for Brazing

AWS classification 1Principal elements, percentTemperature ºF
Silver (Ag)Phosphorous (P)Zinc (Zn)Cadmium (Cd)Tin (Sn)Copper (Cu)Silicon (Si)SolidusLiquidus
BCuP-2 - 7.0-7.5 - - - Remainder - 1310 1460
BCuP-3 4.8-5.2 5.8-6.2 - - - Remainder - 1190 1495
BCuP-4 5.8-6.2 7.0-7.5 - - - Remainder - 1190 1325
BCuP-5 14.5-15.5 4.8-5.2 - - - Remainder - 1190 1475
BCuP-6 1.8-2.2 6.8-7.2 - - - Remainder - 1190 1450
BCuP-7 4.8- 5.2 6.5-7.0 - - - Remainder - 1190 1420
BCuP-8 17.2-18.0 6.0- 6.7 - - - Remainder - 1190 1230
BCuP-9 - 6.0- 7.0 - - 6.0-7.0 Remainder 0.01-0.4 1178 1247
BAg-5 44.0-46.0 - 23.0-27.0 - - 29.0-31.0 - 1225 1370
BAg-6 49.0-51.0 - 14.0-18.0 - - 33.0-35.0 - 1270 1425
BAg-7 2 55.0-57.0 - 15.0-19.0 - 4.5-5.5 21.0-23.0 - 1145 1205
BAg-20 29.0-31.0 - 30.0-34.0 - - 37.0-39.0 - 1250 1410
BAg-28 39.0-41.0 - 26.0-30.0 - 1.5-2.5 29.0-31.0 - 1200 1310
BAg-34 3 37.0-34.0 - 26.0-30.0 - 1.5-2.5 31.0-33.0 - 1200 1330

1ANSI/AWS A5.8 Specification for Filler Metals for Breazing.
2 BAg-7 is a common, cadmium-free substitute for BAg-1.
3 BAg-34 is a common, cadmium-free substitute for BAg-2 and BAg-2a.