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ASTM B860-18

Current Revision

Standard Specification for Zinc Master Alloys for Use in Hot Dip Galvanizing

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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.

 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-1

90/10 Zn/Sb

 

Z55710

Note 1: The master alloys in Specification B860 are intended to be used primarily in hot-dip galvanizing to adjust the concentration of certain elements in a molten zinc bath, and differ from the zinc-aluminum alloys in Specification B997 which are intended to be used primarily in molten zinc-aluminum.

1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


This specification covers electrical contact components made from copper tungsten by powder metallurgical procedures. The material shall conform to the chemical composition limits as agreed upon between the manufacturer and the user. Qualification tests for determination of physical properties shall be performed on production parts, wherever practical or applicable. The tests shall be determined after consideration of the function of the part.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. The paper presented the chemical composition of these materials which include six master alloys of zinc aluminium; Type A-1, Type A-2, Type A-3, Type A-4, Type A-5, Type A-6, and one master alloy of zinc-antimony, Type S-1. The material covered by this specification shall be made of uniform quality and shall be free from harmful contamination. The alloys shall be tested and conform to the required chemical composition requirements.


SDO ASTM: ASTM International
Document Number B860
Publication Date Nov. 1, 2018
Language en - English
Page Count 3
Revision Level 18
Supercedes
Committee B02.04
Publish Date Document Id Type View
Nov. 1, 2018 B0860-18 Revision
June 1, 2017 B0860-17 Revision
May 1, 2016 B0860-16 Revision
Oct. 1, 2015 B0860-15 Revision
Feb. 1, 2013 B0860-13 Revision
Oct. 1, 2009 B0860-09AE01 Revision
Oct. 1, 2009 B0860-09A Revision
April 15, 2009 B0860-09 Revision
Nov. 1, 2008 B0860-08 Revision
June 1, 2007 B0860-07 Revision
May 10, 2002 B0860-05 Revision
May 10, 2002 B0860-02 Revision
May 10, 2002 B0860-01E01 Revision
May 10, 2002 B0860-01 Revision
May 10, 2002 B0860-00 Revision
Oct. 1, 2022 B0860-18R22 Reaffirmation