ASTM B86-22

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.
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Designation: B86 − 18 B86 − 22
Standard Specification for
Zinc and Zinc-Aluminum (ZA) Alloy Foundry and Die
1
Castings
This standard is issued under the fixed designation B86; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1
ε NOTE—Editorial corrections were made to Table 1 in March 2021.
1. Scope*
1.1 This specification covers commercial zinc, zinc-aluminum castings and continuous cast bar stock, as designated and specified
in Table 1. Eight alloy compositions are specified and designated as follows:
A
Common Traditional ASTM UNS
B
Alloy 3 Zamak 3 AG 40A Z33525
Alloy 7 Zamak 7 AG 40B Z33527
B
Alloy 5 Zamak 5 AC 41A Z35533
Alloy 2 Zamak 2 AC 43A Z35545
ZA-8 ZA-8 . Z35638
ZA-12 ZA-12 . Z35633
ZA-27 ZA-27 . Z35841
C
ACuZinc 5 . Z46541
A
See Table 1, Footnote C.
B
SAE Specification, Nos. 903 and 925 conform to the requirements for alloys AG40A and AC41A, respectively.
C
ACuZinc and ACuZinc5 are registered trade names of the General Motors Corporation.
1.2 Zinc Alloys Z33525, Z33527, Z35533, and Z35545 are used primarily in the manufacture of pressure die castings.
Zinc-Aluminum Alloys Z35638, Z35633, and Z35841 are used in the manufacture of both foundry and pressure die castings. These
alloys are also fabricated into continuous cast bar stock used for prototyping and screw machine stock.
1.3 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.
1.4 Systems of nomenclature used to designate zinc and zinc-aluminum (ZA) alloys used for casting are described in Appendix
X1.
1.5 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
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 Nov. 1, 2018Oct. 1, 2022. Published December 2018November 2022. Originally approved in 1931. Last previous edition approved in 20132018
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as B86B86 – 18 – 13. . DOI: 10.1520/B0086-18E01.10.1520/B0086-22.
*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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B86 − 22
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TABLE 1 Chemical Requirements
A, B, C
ElementsComposition % max, except as indicated
Traditional ASTM
Common Name UNS Al Mg Cu Fe Pb Cd Sn Ni
Name Designation
A,B,C,D
Alloy 3 Zamak 3 (AG40A) Z33525 3.7-4.3 0.02-0.06 0.10 0.05 0.0050 0.0040 0.002 .
A,B,C,D,E
Alloy 7 Zamak 7 (AG40B) Z33527 3.7-4.3 0.005-0.020 0.10 0.05 0.0030 0.0020 0.0010 0.005-0.020
A,B,C,D
Alloy 5 Zamak 5 (AC41A) Z35533 3.7-4.3 0.02-0.06 0.7-1.2 0.05 0.0050 0.0040 0.002 .
A,C,,D
Alloy 2 Zamak 2 (AC43A) Z35545 3.7-4.3 0.02-0.05 2.6-3.3 0.05 0.0050 0.0040 0.002 .
A,C,F
ZA-8 ZA-8 Z35638 8.0-8.8 0.01-0.03 0.8-1.3 0.075 0.006 0.006 0.003 .
A,C,F
ZA-12 ZA-12 Z35633 10.5-11.5 0.01-0.03 0.5-1.2 0.075 0.006 0.006 0.003 .
A,C,F
ZA-27 ZA-27 Z35841 25.0-28.0 0.01-0.020 2.0-2.5 0.075 0.006 0.006 0.003 .
A,C,F
ACuZinc5 ACuZinc5 Z46541 2.5-3.3 0.025-0.05 5.0-6.0 0.075 0.005 0.004 0.003 .
A
For purposes of acceptance and rejection, the observed value or calculated value obtained from analysis should be rounded to the nearest unit in the last right-hand place of figures, used in expressing the specified
limit, in accordance with the rounding procedure prescribed in Practice E29. Note: Elements with a single value are considered maximum allowed concentrations.
B
Zinc alloy castings may contain nickel, chromium, silicon, and manganese in amounts of 0.02, 0.02, 0.035, and 0.06 %, respectively. No harmful effects deleterious effects on alloy performance have ever been noted
due to the presence of these elements in these concentrations and, therefore, analyses are not required for these elements, with the exception of nickel analysis for Z33527.
C
AST
...

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: B86 − 22
Standard Specification for
Zinc and Zinc-Aluminum (ZA) Alloy Foundry and Die
1
Castings
This standard is issued under the fixed designation B86; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* with all hazards including those identified in the appropriate
Safety Data Sheet (SDS) for this product/material as provided
1.1 This specification covers commercial zinc, zinc-
by the manufacturer, to establish appropriate safety, health,
aluminum castings and continuous cast bar stock, as designated
and environmental practices, and determine the applicability
and specified in Table 1. Eight alloy compositions are specified
of regulatory limitations prior to use.
and designated as follows:
1.6 This international standard was developed in accor-
A
Common Traditional ASTM UNS
dance with internationally recognized principles on standard-
B
Alloy 3 Zamak 3 AG 40A Z33525 ization established in the Decision on Principles for the
Alloy 7 Zamak 7 AG 40B Z33527
Development of International Standards, Guides and Recom-
B
Alloy 5 Zamak 5 AC 41A Z35533
mendations issued by the World Trade Organization Technical
Alloy 2 Zamak 2 AC 43A Z35545
ZA-8 ZA-8 . Z35638 Barriers to Trade (TBT) Committee.
ZA-12 ZA-12 . Z35633
ZA-27 ZA-27 . Z35841
2. Referenced Documents
C
ACuZinc 5 . Z46541
2.1 The following documents of the issue in effect on date
A
See Table 1, Footnote C.
of order acceptance form a part of this specification to the
B
SAE Specification, Nos. 903 and 925 conform to the requirements for alloys
extent referenced herein:
AG40A and AC41A, respectively.
C
ACuZinc and ACuZinc5 are registered trade names of the General Motors 2
2.2 ASTM Standards:
Corporation.
B240 Specification for Zinc and Zinc-Aluminum (ZA) Al-
1.2 Zinc Alloys Z33525, Z33527, Z35533, and Z35545 are
loys in Ingot Form for Foundry and Die Castings
used primarily in the manufacture of pressure die castings.
B275 Practice for Codification of Certain Zinc, Tin and Lead
Zinc-Aluminum Alloys Z35638, Z35633, and Z35841 are used
3
Die Castings (Withdrawn 2020)
in the manufacture of both foundry and pressure die castings.
B557 Test Methods for Tension Testing Wrought and Cast
These alloys are also fabricated into continuous cast bar stock
Aluminum- and Magnesium-Alloy Products
used for prototyping and screw machine stock.
B899 Terminology Relating to Non-ferrous Metals and Al-
1.3 The values stated in inch-pound units are to be regarded
loys
as standard. The values given in parentheses are mathematical
B949 Specification for General Requirements for Zinc and
conversions to SI units that are provided for information only
Zinc Alloy Products
and are not considered standard.
E8/E8M Test Methods for Tension Testing of Metallic Ma-
terials
1.4 Systems of nomenclature used to designate zinc and
E23 Test Methods for Notched Bar Impact Testing of Me-
zinc-aluminum (ZA) alloys used for casting are described in
tallic Materials
Appendix X1.
E29 Practice for Using Significant Digits in Test Data to
1.5 This standard does not purport to address all of the
Determine Conformance with Specifications
safety concerns, if any, associated with its use. It is the
E527 Practice for Numbering Metals and Alloys in the
responsibility of the user of this standard to become familiar
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
Current edition approved Oct. 1, 2022. Published November 2022. Originally the ASTM website.
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approved in 1931. Last previous edition approved in 2018 as B86 – 18 . DOI: The last approved version of this historical standard is referenced on
10.1520/B0086-22. www.astm.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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B86 − 22
2
TABLE 1 Chemical Requirements
A, B, C
Composition % max, except as indicated
Traditional ASTM
Common Name UNS Al Mg Cu Fe Pb Cd Sn Ni
Name Designation
A,B,C,D
Alloy 3 Zamak 3 (AG40A) Z33525 3.7-4.3 0.02-0.06 0.10 0.05 0.0050 0.0040 0.002 .
A,B,C,D,E
Alloy 7 Zamak
...