ASTM B860-09ae1
(Specification)Standard Specification for Zinc Master Alloys for Use in Hot Dip Galvanizing
Standard Specification for Zinc Master Alloys for Use in Hot Dip Galvanizing
ABSTRACT
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.
SCOPE
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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Designation:B860 −09a
StandardSpecification for
1
Zinc Master Alloys for Use in Hot Dip Galvanizing
This standard is issued under the fixed designation B860; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1
´ NOTE—Table 1 was corrected editorially in May 2010.
1. Scope* B897 Specification for Configuration of Zinc and ZincAlloy
Jumbo Block and Half Block Ingot
1.1 This specification covers zinc master alloys which are
B899 Terminology Relating to Non-ferrous Metals and Al-
used in hot dip galvanizing for the purpose of adjusting the
loys
concentration of certain alloying elements in the molten zinc
E29 Practice for Using Significant Digits in Test Data to
bath. Table 1 covers the chemical composition of these
Determine Conformance with Specifications
materials which include six master alloys of zinc-aluminum
E88 Practice for Sampling Nonferrous Metals and Alloys in
(brightener) and one master alloy of zinc-antimony.
Cast Form for Determination of Chemical Composition
ASTM Common UNS
E527 Practice for Numbering Metals and Alloys in the
Type A-1 90/10 Zn/Al High Purity Z30750
Type A-2 90/10 Zn/Al Low Purity Z31710 Unified Numbering System (UNS)
Type A-3 95/5 Zn/Al High Purity Z30503
E536 Test Methods for Chemical Analysis of Zinc and Zinc
Type A-4 95/5 Zn/Al Low Purity Z31510
Alloys
Type A-5 96/4 Zn/Al High Purity .
3
Type A-6 96/4 Zn/Al Low Purity . 2.3 ISO Standards:
Type S-1 90/10 Zn/Sb Z55710
ISO 3815-1 Zinc and zinc alloys — Part 1:Analysis of solid
1.2 The values stated in inch-pound units are to be regarded
samples by optical emission spectrometry
as standard. The values given in parentheses are mathematical
ISO 3815-2 Zinc and zinc alloys — Part 2: Analysis by
conversions to SI units that are provided for information only
inductively coupled plasma optical emission spectrometry
and are not considered standard.
3. Terminology
1.3 This standard does not purport to address all of the
3.1 Terms defined in Terminology B899 shall apply unless
safety concerns, if any, associated with its use. It is the
defined otherwise in this standard.
responsibility of the user of this standard to become familiar
with all hazards including those identified in the appropriate
3.2 Definitions of Terms Specific to This Standard:
Material Safety Data Sheet (MSDS) for this product/material
3.2.1 brightener bar, n—brightener bar is a zinc alloy
as provided by the manufacturer, to establish appropriate
containing aluminum which is added to the galvanizing bath to
safety and health practices, and determine the applicability of
adjust the aluminum content of the bath to: suppress the
regulatory limitations prior to use.
formation of iron-zinc alloy layers, increase the brightness and
ductilityofthegalvanizedcoating,andimprovethedrainageof
2. Referenced Documents
zinc from the work as it exits the bath; also called brightener.
2.1 The following documents of the issue in effect on date
4. Ordering Information
of order acceptance form a part of this specification to the
extent referenced herein: 4.1 Orders for ingots under this specification shall include
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the following information:
2.2 ASTM Standards:
4.1.1 Quantity, lb,
4.1.2 Alloy type (see Table 1),
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4.1.3 Size and type of ingot (jumbo, type 1 block, type 2
This specification is under the jurisdiction of ASTM Committee B02 on
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
block, slab or other ingot shape), if not manufacturer’s
B02.04 on Zinc and Cadmium.
standard,
Current edition approved Oct. 1, 2009. Published November 2009. Originally
4.1.4 Specification number and year date,
approved in 1995. Last previous edition approved in 2009 as B860 - 09. DOI:
10.1520/B0860-09AE01. 4.1.5 Source inspection (see Section 8), and
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036, http://www.ansi.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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B860−09a
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TABLE 1 Chemical Requirements Composition, % (Range or Maximum Value)
Type A-1 90 % Zinc–10 % Aluminum (90/10 Zn/Al) High Purity
Type A-2 90 % Zinc–10 % Aluminum (90/10 Zn/Al) Low Purity
Type A-3 95 % Zinc–5 %
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
´1
Designation:B860–09a Designation: B860 – 09a
Standard Specification for
1
Zinc Master Alloys for Use in Hot Dip Galvanizing
This standard is issued under the fixed designation B860; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1
´ NOTE—Table 1 was corrected editorially in May 2010.
1. Scope*
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 .
Type A-6 96/4 Zn/Al Low Purity .
Type S-1 90/10 Zn/Sb Z55710
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 Material Safety Data
Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and
determine the applicability of regulatory limitations prior to use.
2. Referenced Documents
2.1 The following documents of the issue in effect on date of order acceptance form a part of this specification to the extent
referenced herein:
2
2.2 ASTM Standards:
B897 Specification for Configuration of Zinc and Zinc Alloy Jumbo Block and Half Block Ingot
B899 Terminology Relating to Non-ferrous Metals and Alloys
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E88 Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical Composition
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
E536 Test Methods for Chemical Analysis of Zinc and Zinc Alloys
3
2.3 ISO Standards:
ISO 3815-1 Zinc and zinc alloys — Part 1: Analysis of solid samples by optical emission spectrometry
ISO 3815-2 Zinc and zinc alloys — Part 2: Analysis by inductively coupled plasma optical emission spectrometry
3. Terminology
3.1 Terms defined in Terminology B899 shall apply unless defined otherwise in this standard.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 brightener bar, n—brightener bar is a zinc alloy containing aluminum which is added to the galvanizing bath to adjust
the aluminum content of the bath to: suppress the formation of iron-zinc alloy layers, increase the brightness and ductility of the
galvanized coating, and improve the drainage of zinc from the work as it exits the bath; also called brightener.
1
This specification is under the jurisdiction ofASTM Committee B02 on Nonferrous Metals andAlloys and is the direct responsibility of Subcommittee B02.04 on Zinc
and Cadmium.
Current edition approved Oct. 1, 2009. Published November 2009. Originally approved in 1995. Last previous edition approved in 2009 as B860 - 09. DOI:
10.1520/B0860-09A.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
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B860 – 09a
A
TABLE 1 Chemical Requirements Composition, % (Range or Maximum Value)
Type A-1 90 % Zinc–10 % Aluminum (90/10 Zn/Al) High Purity
Type A-2 90 % Zinc–10 % Aluminum (90/10 Zn/Al) Low Purity
Type A-3 95 % Zinc–5 % Aluminum (95/5 Zn/Al) High Purity
Type A-4 95 % Zinc–5 % Aluminum
...
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