ASTM B860-16
(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 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.
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
Z31520
Type A-6
96/4 Zn/Al
Low Purity
Z30504
Type S-1
90/10 Zn/Sb
Z55710 (A) The following applies to all specified limits in this table: For purposes of determining conformance with this specification, an observed value obtained from analysis shall be rounded off to the nearest unit in the last right-hand place of figures used in expressing the limiting value, in accordance with the rounding method of Practice E29.(B) UNS numbers in conformance with Practice E527.(C) Chemical method under development.(D) For information only. Quantitative determination of this element is not required. Zinc is assumed to be the difference between 100 % and the sum of those elements listed above.
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 and health practices, and determine the applicability of regulatory limitations prior to use.
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Designation:B860 −16
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.
2
1. Scope* 2.2 ASTM Standards:
B897 Specification for Configuration of Zinc and ZincAlloy
1.1 This specification covers zinc master alloys which are
Jumbo, Block, Half Block, and Slab Ingot
used in hot dip galvanizing for the purpose of adjusting the
B899 Terminology Relating to Non-ferrous Metals and Al-
concentration of certain alloying elements in the molten zinc
loys
bath. Table 1 covers the chemical composition of these
B949 Specification for General Requirements for Zinc and
materials which include six master alloys of zinc-aluminum
Zinc Alloy Products
(brightener) and one master alloy of zinc-antimony.
B997 Specification for Zinc-Aluminum Alloys in Ingot
ASTM Common UNS
Form for Hot-Dip Coatings
Type A-1 90/10 Zn/Al High Purity Z30750
E29 Practice for Using Significant Digits in Test Data to
Type A-2 90/10 Zn/Al Low Purity Z31710
Type A-3 95/5 Zn/Al High Purity Z30503
Determine Conformance with Specifications
Type A-4 95/5 Zn/Al Low Purity Z31510
E88 Practice for Sampling Nonferrous Metals and Alloys in
Type A-5 96/4 Zn/Al High Purity Z31520
Cast Form for Determination of Chemical Composition
Type A-6 96/4 Zn/Al Low Purity Z30504
Type S-1 90/10 Zn/Sb Z55710
E527 Practice for Numbering Metals and Alloys in the
Unified Numbering System (UNS)
NOTE 1—The master alloys in Specification B860 are intended to be
E536 Test Methods for Chemical Analysis of Zinc and Zinc
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 Alloys
3
in Specification B997 which are intended to be used primarily in molten
2.3 ISO Standards:
zinc-aluminum.
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:
Safety Data Sheet (SDS) for this product/material as provided
3.2.1 brightener bar, n—brightener bar is a zinc alloy
by the manufacturer, to establish appropriate safety and health
containing aluminum which is added to the galvanizing bath to
practices, and determine the applicability of regulatory limi-
adjust the aluminum content of the bath to: suppress the
tations 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
4.1 Orders for ingots under this specification shall include
extent referenced herein:
the following information:
1 2
This specification is under the jurisdiction of ASTM Committee B02 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
B02.04 on Zinc and Cadmium. Standards volume information, refer to the standard’s Document Summary page on
CurrenteditionapprovedMay1,2016.PublishedJuly2016.Originallyapproved the ASTM website.
3
in 1995. Last previous edition approved in 2015 as B860 – 15. DOI: 10.1520/ Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
B0860-16. 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 ----------------------
B860−16
A
TABLE 1 Chemical Requirements Composition, % (Range or Maximum Value)
Type A-1 90 % Zinc–10
...
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.
Designation: B860 − 15 B860 − 16
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. 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 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 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, Half Block, and Slab Ingot
B899 Terminology Relating to Non-ferrous Metals and Alloys
B949 Specification for General Requirements for Zinc and Zinc Alloy Products
B997 Specification for Zinc-Aluminum Alloys in Ingot Form for Hot-Dip Coatings
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
1
This specification is under the jurisdiction of ASTM Committee B02 on Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee B02.04 on Zinc
and Cadmium.
Current edition approved Oct. 1, 2015May 1, 2016. Published October 2015July 2016. Originally approved in 1995. Last previous edition approved in 20132015 as B860 –
13.15. DOI: 10.1520/B0860-15.10.1520/B0860-16.
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 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 ----------------------
B860 − 16
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 (95/5 Zn/Al) Low Purity
Type A-5 96 % Zinc–4 % Aluminum (96/4 Zn/Al) High Purity
Type A-6 96 %
...
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