Table 1a. Brazing Filler Metals, Based on Specifications and Appendix of American Welding Society AWS A5.8–1981 AWS Classifica tion a Nominal Composition, b Percent Temperature, Degrees F Standard Form c Uses Ag Cu Zn Al Ni Other Soli dus Liq uidus Brazing Range BAg-2a 30 27 23 … … Cd, 20 1125 1310 1310–1550 1, 2, 4 Table 1a. (Continued) Brazing Filler Metals, Based on Specifications and Appendix of American Welding Society AWS A5.8–1981
BAg-3 50 15.5 15.5 … 3 BAg-4 40 30 28 … 2
Cd, 16 1170 1270 1270–1500 1, 2, 4, 7
… 1240 1435 1435–1650
1, 2 1, 2 1, 2
BAg-5 45 30 25 … … … 1250 1370 1370–1550 BAg-6 50 34 16 … … … 1270 1425 1425–1600
BAg-7 56 22 17 … … Sn, 5 1, 2 BAg-8 72 28 … … … … 1435 1435 1435–1650 1, 2, 4 BAg-8a 72 27.8 … … … Li, 2. 1410 1410 1410–1600 1, 2 BAg-13 54 40 5 … 1 … 1325 1575 1575–1775 1, 2 BAg-13a 56 42 … … 2 … 1420 1640 1600–1800 1, 2 BAg-18 60 30 … … … Sn, 10 1115 1325 1325–1550 1, 2 BAg-19 92.5 7.3 … … … Li, 2 1435 1635 1610–1800 1, 2 BAg-20 30 38 32 … … … 1250 1410 1410–1600 1, 2, 4 BAg-21 63 28.5 … … 2.5 Sn, 6 1275 1475 1475–1650 1, 2, 4 1145 1205 1205–1400
For joining most ferrous and nonferrous metals except aluminum and magnesium. These filler metals have good brazing properties and are suitable for preplacement in the joint or for manual feeding into the joint. All methods of heating may be used. Lap joints are generally used; however, butt joints may be used. Joint clearances of .002 to .005 inch are recommended. Flux is generally required.
BAg-22 49 16 23 … 4.5 Mn, 7.5 1260 1290 1290–1525 1, 2, 4, 7 BAg-23 85 … … … … Mn, 15 1760 1780 1780–1900 1, 2, 4 BAg-24 50 20 28 … 2 … 1220 1305 1305–1550 1, 2 BAg-25 20 40 35 … … Mn, 5 1360 1455 1455–1555 2, 4 BAg-26 25 38 33 … 2 Mn, 2 1305 1475 1475–1600 1, 2, 4, 7 BAg-27 25 35 26.5 … … Cd, 13.5 1125 1375 1375–1575 1, 2, 4 BAg-28 40 30 28 … … Sn, 2 1200 1310 1310–1550 1, 2, 4 a These classifications contain chemical symbols preceded by “B” which stands for brazing filler metal.
b These are nominal compositions. Trace elements may be present in small amounts and are not shown. Abbreviations used are: Ag, silver; Cu, copper; Zn, zinc; Al, aluminum; Ni, nickel; Ot, other; Si, silicon; P, phosphorus; Cd, cadmium; Sn, tin; Li, lithium; Cr, chromium; B, boron; Fe, iron; O, oxygen; Mg, magnesium; W, tungsten; Pd, palladium; and Au, gold. c Numbers specify standard forms as follows: 1, strip; 2, wire; 3, rod; 4, powder; 5, sheet; 6, paste; 7, clad sheet or strip; and 8, transfer tape.
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