ASTM B86-18e1

Standard Specification for Zinc and Zinc-Aluminum (ZA) Alloy Foundry and Die Castings

ABSTRACT
This specification covers commercial zinc, zinc-aluminum castings and continuous cast bar stock. Seven alloy compositions are specified and designated: Alloy 3; Alloy 7; Alloy 5; Alloy 2; ZA-8; ZA-12; ZA-27. The metal used in the manufacture of die castings shall be zinc alloy of a specified chemical composition conforming to the requirements specified. Impact test and tension test shall be made to conform to the specified requirements.
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:    
Common  
Traditional  
ASTM A  
UNS  
Alloy 3  
Zamak 3  
AG 40A B  
Z33525  
Alloy 7  
Zamak 7  
AG 40B  
Z33527  
Alloy 5  
Zamak 5  
AC 41A B  
Z35533  
Alloy 2  
Zamak 2  
AC 43A  
Z35545  
ZA-8  
ZA-8  
...  
Z35638  
ZA-12  
ZA-12  
...  
Z35633  
ZA-27  
ZA-27  
...  
Z35841  
ACuZinc 5C  
...  
Z46541    
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 (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.  
1.6 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.

General Information

• Status: Historical
• Publication Date: 31-Oct-2018
• ICS: 77.150.60 - Lead, zinc and tin products
• Technical Committee: B02 - Nonferrous Metals and Alloys
• Drafting Committee: B02.04 - Zinc and Cadmium

Standards Content (Sample)

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
´1
Designation:B86 −18
Standard Specification for
Zinc and Zinc-Aluminum (ZA) Alloy Foundry and Die
1
Castings
Thisstandardis issued under thefixed designationB86;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
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* 1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
1.1 This specification covers commercial zinc, zinc-
responsibility of the user of this standard to become familiar
aluminumcastingsandcontinuouscastbarstock,asdesignated
with all hazards including those identified in the appropriate
and specified in Table 1. Eight alloy compositions are specified
Safety Data Sheet (SDS) for this product/material as provided
and designated as follows:
by the manufacturer, to establish appropriate safety, health,
A
Common Traditional ASTM UNS
and environmental practices, and determine the applicability
B of regulatory limitations prior to use.
Alloy 3 Zamak 3 AG 40A Z33525
Alloy 7 Zamak 7 AG 40B Z33527
1.6 This international standard was developed in accor-
B
Alloy 5 Zamak 5 AC 41A Z35533
dance with internationally recognized principles on standard-
Alloy 2 Zamak 2 AC 43A Z35545
ization established in the Decision on Principles for the
ZA-8 ZA-8 . Z35638
ZA-12 ZA-12 . Z35633
Development of International Standards, Guides and Recom-
ZA-27 ZA-27 . Z35841
mendations issued by the World Trade Organization Technical
C
ACuZinc 5 . Z46541
Barriers to Trade (TBT) Committee.
A
See Table 1, Footnote C.
B
SAE Specification, Nos. 903 and 925 conform to the requirements for alloys
2. Referenced Documents
AG40A and AC41A, respectively.
C
ACuZinc and ACuZinc5 are registered trade names of the General Motors 2.1 The following documents of the issue in effect on date
Corporation.
of order acceptance form a part of this specification to the
extent referenced herein:
1.2 Zinc Alloys Z33525, Z33527, Z35533, and Z35545 are
2
used primarily in the manufacture of pressure die castings.
2.2 ASTM Standards:
Zinc-AluminumAlloys Z35638, Z35633, and Z35841 are used
B240 Specification for Zinc and Zinc-Aluminum (ZA) Al-
in the manufacture of both foundry and pressure die castings.
loys in Ingot Form for Foundry and Die Castings
These alloys are also fabricated into continuous cast bar stock
B275 PracticeforCodificationofCertainZinc,TinandLead
3
used for prototyping and screw machine stock.
Die Castings (Withdrawn 2020)
B557 Test Methods for Tension Testing Wrought and Cast
1.3 The values stated in inch-pound units are to be regarded
Aluminum- and Magnesium-Alloy Products
as standard. The values given in parentheses are mathematical
B899 Terminology Relating to Non-ferrous Metals and Al-
conversions to SI units that are provided for information only
loys
and are not considered standard.
B949 Specification for General Requirements for Zinc and
1.4 Systems of nomenclature used to designate zinc and
Zinc Alloy Products
zinc-aluminum (ZA) alloys used for casting are described in
E8/E8M Test Methods for Tension Testing of Metallic Ma-
Appendix X1.
terials
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 [e-mail]. 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 Nov. 1, 2018. Published December 2018. Originally the ASTM website.
3
approved in 1931. Last previous edition approved in 2013 as B86 – 13. DOI: The last approved version of this historical standard is referenced on
10.1520/B0086-18E01. 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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B86−18
2
TABLE 1 Chemical Requirements
Elements
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
...

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: B86 − 18 B86 − 18
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, 2018. Published December 2018. Originally approved in 1931. Last previous edition approved in 2013 as B86 – 13. DOI:
10.1520/B0086-18.10.1520/B0086-18E01.
*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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B86 − 18
2
TABLE 1 Chemical Requirements
Elements
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 (AG41A) Z35533 3.7-4.3 0.02-0.06 0.7-1.2 0.05 0.0050 0.0040 0.002 .
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 (AG43A) Z35545 3.7-4.3 0.02-0.05 2.6-3.3 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.
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 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
ASTM alloy designations
...