1.1 This specification covers zinc master alloys which are used in hot dip galvanizing for the purpose of adjusting the concentration of certain alloying elements in the molten zinc bath. Table 1 covers the chemical composition of these materials which include six master alloys of zinc-aluminum (brightener) and one master alloy of zinc-antimony.
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| 8201;ASTM | 8199;8199;Common |
| UNS |
|
| Type A-1 | 90/10 Zn/Al | High Purity | Z30750 |
|
| Type A-2 | 90/10 Zn/Al | Low Purity | Z31710 |
|
| Type A-3 | 95/5 Zn/Al | High Purity | Z30503 |
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| Type A-4 | 95/5 Zn/Al | Low Purity | Z31510 |
|
| Type A-5 | 96/4 Zn/Al |
|