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.
| 8201;ASTM | 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 |
| Type A-4 | 95/5 Zn/Al | Low Purity | Z31510 |
| Type A-5 | 96/4 Zn/Al | High Purity | Z31520 |
| Type A-6 | 96/4 Zn/Al | Low Purity | Z30504 |
| Type S-
ASTM B860-17 history- 2022 ASTM B860-18(2022) Standard Specification for Zinc Master Alloys for Use in Hot Dip Galvanizing
- 2018 ASTM B860-18 Standard Specification for Zinc Master Alloys for Use in Hot Dip Galvanizing
- 2017 ASTM B860-17 Standard Specification for Zinc Master Alloys for Use in Hot Dip Galvanizing
- 2016 ASTM B860-16 Standard Specification for Zinc Master Alloys for Use in Hot Dip Galvanizing
- 2015 ASTM B860-15 Standard Specification for Zinc Master Alloys for Use in Hot Dip Galvanizing
- 2013 ASTM B860-13 Standard Specification for Zinc Master Alloys for Use in Hot Dip Galvanizing
- 2009 ASTM B860-09ae1 Standard Specification for Zinc Master Alloys for Use in Hot Dip Galvanizing
- 2009 ASTM B860-09a Standard Specification for Zinc Master Alloys for Use in Hot Dip Galvanizing
- 2009 ASTM B860-09 Standard Specification for Zinc Master Alloys for Use in Hot Dip Galvanizing
- 2008 ASTM B860-08 Standard Specification for Zinc Master Alloys for Use in Hot Dip Galvanizing
- 2007 ASTM B860-07 Standard Specification for Zinc Master Alloys for Use in Hot Dip Galvanizing
- 2002 ASTM B860-05 Standard Specification for Zinc Master Alloys for Use in Hot Dip Galvanizing
- 2002 ASTM B860-02 Standard Specification for Zinc Master Alloys for Use in Hot Dip Galvanizing
- 2001 ASTM B860-01E1 Standard Specification for Zinc Master Alloys for Use in Hot Dip Galvanizing
- 2002 ASTM B860-01 Standard Specification for Zinc Master Alloys for Use in Hot Dip Galvanizing
- 2000 ASTM B860-00 Standard Specification for Zinc Master Alloys for Use in Hot Dip Galvanizing
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