ASTM B860-08
(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-190/10 Zn/Al High PurityZ30750 Type A-290/10 Zn/Al Low PurityZ31710 Type A-395/5 Zn/Al High PurityZ30503 Type A-495/5 Zn/Al Low PurityZ31510 Type A-596/4 Zn/Al High Purity... Type A-696/4 Zn/AlLow Purity... Type S-190/10 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.
TABLE 1 Chemical Requirements Composition, % (Range or Maximum Value)A Type A-190 % Zinc–10 % Aluminum (90/10 Zn/Al)High Purity Type A-290 % Zinc–10 % Aluminum (90/10 Zn/Al)Low Purity Type A-395 % Zinc–5 % Aluminum (95/5 Zn/Al)High Purity Type A-495 % Zinc–5 % Aluminum (95/5 Zn/Al)Low Purity Type A-596 % Zinc–4 % Aluminum (96/4 Zn/Al)High Purity Type A-696 % Zinc–4 % Aluminum (96/4 Zn/Al)Low Purity Type S-190 % Zinc–10 % Antimony (90/10 Zn/Sb) UNSBType A-1
90/10 Zn/Al
Z30750Type A-2
90/10 Zn/Al
Z31710Type A-3
95/5 Zn/Al
Z30503Type A-4
95/5 Zn/Al
Z31510 Type A-5
96/4 Zn/Al
ZXXXXXType A-6
96/4 Zn/Al
ZXXXXXType S-1
90/10 Zn/Sb
Z55710 Fe0.05 max0.15 max0.05 max0.15 max0.05 max0.15 max0.03 max Pb0.005 max0.4 max0.005 max0.4 max0.0005 max0.4 max0.015 max Cd0.004 max...0.004 max...0.004 max...0.003 max Cu0.035 max0.5 max0.035 max0.5 max0.035 max0.5 max0.003 max Mg............0.06 max0.06 max Sn0.003 max...0.003 max...0.003 max...0.01 max As..................0.015 max Al9.5–10.59.5–10.54.5–5.54.5–5.54.0-4.54.0-4.5... SbC..................9.5–10.5 Others, Total0.01 max0.25 max0.01 max0.25 max0.01 max0.25 max0.03 max ZnDRemainderRemainderRemainderRemainderRemainderRemainderRemainder
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 E 29.
B UNS numbers in conformanc...
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Designation: B 860 – 08
Standard Specification for
1
Zinc Master Alloys for Use in Hot Dip Galvanizing
This standard is issued under the fixed designation B 860; 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* E29 Practice for Using Significant Digits in Test Data to
Determine Conformance with Specifications
1.1 This specification covers zinc master alloys which are
E47 Test Methods for Chemical Analysis of Zinc Die-
used in hot dip galvanizing for the purpose of adjusting the
3
Casting Alloys
concentration of certain alloying elements in the molten zinc
E88 Practice for Sampling Nonferrous Metals and Alloys
bath. Table 1 covers the chemical composition of these
in Cast Form for Determination of Chemical Composition
materials which include six master alloys of zinc-aluminum
E 527 Practice for Numbering Metals and Alloys in the
(brightener) and one master alloy of zinc-antimony.
Unified Numbering System (UNS)
ASTM Common UNS
E 536 TestMethodsforChemicalAnalysisofZincandZinc
Type A-1 90/10 Zn/Al High Purity Z30750
Type A-2 90/10 Zn/Al Low Purity Z31710
Alloys
Type A-3 95/5 Zn/Al High Purity Z30503
4
2.3 ISO Standards:
Type A-4 95/5 Zn/Al Low Purity Z31510
ISO 3815-1 Zinc and zinc alloys — Part 1:Analysis of solid
Type A-5 96/4 Zn/Al High Purity .
Type A-6 96/4 Zn/Al Low Purity .
samples by optical emission spectrometry
Type S-1 90/10 Zn/Sb Z55710
ISO 3815-2 Zinc and zinc alloys — Part 2: Analysis by
1.2 The values stated in inch-pound units are to be regarded inductively coupled plasma optical emission spectrometry
as standard. The values given in parentheses are mathematical
3. Terminology
conversions to SI units that are provided for information only
and are not considered standard. 3.1 Terms defined in Terminology B 899 shall apply unless
defined otherwise in this standard.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4. Ordering Information
responsibility of the user of this standard to become familiar
4.1 Orders for ingots under this specification shall include
with all hazards including those identified in the appropriate
the following information:
Material Safety Data Sheet (MSDS) for this product/material
4.1.1 Quantity, lb,
as provided by the manufacturer, to establish appropriate
4.1.2 Alloy type (see Table 1),
safety and health practices, and determine the applicability of
4.1.3 Size and type of ingot (jumbo, type 1 block, type 2
regulatory limitations prior to use.
block, slab or other ingot shape), if not manufacturer’s stan-
2. Referenced Documents
dard,
4.1.4 Specification number and year date,
2.1 The following documents of the issue in effect on date
of order acceptance form a part of this specification to the 4.1.5 Source inspection (see Section 8), and
4.1.6 Marking (see Section 10).
extent referenced herein:
2
2.2 ASTM Standards:
5. Materials and Manufacture
B 897 Specification for the Configuration of Zinc and Zinc
5.1 The material covered by this specification shall be of
Alloy Jumbo and Block Ingot
uniform quality and shall be free from harmful contamination.
B 899 Terminology Relating to Non-ferrous Metals and
The ingot surface shall contain a minimum of dross and
Alloys
adhering foreign matter.
1
6. Chemical Requirements Chemical Requirements
This specification is under the jurisdiction of ASTM Committee B02 on
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
6.1 Limits—The alloys shall conform to the requirements as
B02.04 on Zinc and Cadmium.
to chemical composition prescribed in Table 1. Conformance
Current edition approved Nov. 1, 2008. Published December 2008. Originally
approved in 1995. Last previous edition approved in 2007 as B 860 - 07.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Withdrawn.
4
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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B860–08
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 % Zi
...
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:B860–07 Designation: B 860 – 08
Standard Specification for
1
Zinc Master Alloys for Use in Hot Dip Galvanizing
This standard is issued under the fixed designation B 860; 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 .
Type A-6 96/4 Zn/Al Low Purity .
Type S-1 90/10 Zn/Sb Z55710
1.2The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the standard.
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:
B 897 Specification for the Configuration of Zinc and Zinc Alloy Jumbo and Block Ingot
B 899 Terminology Relating to Non-ferrous Metals and Alloys
E 29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
3
E 47 Test Methods for Chemical Analysis of Zinc Die-Casting Alloys
E 88 Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical Composition
E 527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
E 536 Test Methods for Chemical Analysis of Zinc and Zinc Alloys
4
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 B 899 shall apply unless defined otherwise in this standard.
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 JuneNov. 1, 2007.2008. Published July 2007.December 2008. Originally approved in 1995. Last previous edition approved in 20052007 as
B 860 - 057.
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
Withdrawn.
4
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
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B860–08
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
T
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