ASTM B86-13

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. Seven 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 A See Table 1, Footnote C.B SAE Specification, Nos. 903 and 925 conform to the requirements for alloys AG40A and AC41A, respectively.TABLE 1 Chemical Requirements    
Element  
Alloy 3A,B,C,D
Zamak 3
(AG40A)  
Alloy 7A ,B,C,D,E
Zamak 7
(AG40B)  
Alloy 5A,B,C,D
Zamak 5
(AC41A)  
Alloy 2A,C,,D
Zamak 2
(AC43A)  
ZA-8A,C,F
ZA-8  
ZA-12A,C ,F
ZA-12  
ZA-27A,C,F
ZA-27  
(Z33525)  
(Z33527)  
(Z35533)  
(Z35545)  
(Z35638)  
(Z35633)  
(Z35841)    
Aluminum  
3.7-4.3  
3.7-4.3  
3.7-4.3  
3.7-4.3  
8.0-8.8  
10.5-11.5  
25.0-28.0  
Magnesium  
0.02-0.06G  
0.005-0.020  
0.02-0.06G  
0.02-0.06  
0.01-0.03  
0.01-0.03  
0.01-0.02  
Copper  
0.1 maxH  
0.1 maxE  
0.7-1.2  
2.6-3.3  
0.8-1.3  
0.5-1.2  
2.0-2.5  
Iron, max  
0.05  
0.05  
0.05  
0.05  
0.075  
0.075  
0.075  
Lead, max  
0.005  
0.003  
0.005  
0.005  
0.006  
0.006  
0.006  
Cadmium, max  
0.004  
0.002  
0.004  
0.004  
0.006  
0.006  
0.006  
Tin, max  
0.002  
0.001  
0.002  
0.002  
0.003  
0.003  
0.003  
Nickel  
. . .  
0.005-0.020  
. . .  
. . .  
. . .  
. . .  
. . .  
ZincI  
remainder  
remainder  
remainder  
remainder  
remainder  
remainder  
remainder 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 were established in accordance with Practice B275. The UNS designations were established in accordance with Practice E527. The last digit of a UNS number differentiates between alloys of similar composition. The UNS designations for ingot and casting versions of an alloy were not assigned in the same sequence for all alloys.D When this material is required to conform to ISO 301, the chemical limits for thallium and indium each shall not exceed 0.001 %.E For the majority of commercial applications, a copper content up to 0.25 % will not adversely affect the serviceability of these die castings and should not serve as a basis for rejection, unless otherwise specified in the contract or purchase order between the producer and user.F Zinc-aluminum ingot for foundry and pressure die casting may contain chrome, manganese, or nickel in amounts of up to 0.01 % each or 0.03 % total. No harmful effects have ever been noted due to the presence of these elements in up to these concentrations and, therefore, analyses ar...

General Information

• Status: Historical
• Publication Date: 31-Jan-2013
• ICS: 77.150.60 - Lead, zinc and tin products
• Technical Committee: B02 - Nonferrous Metals and Alloys
• Drafting Committee: B02.04 - Zinc and Cadmium

Relations

• Replaces: ASTM B86-11 - Standard Specification for Zinc and Zinc-Aluminum (ZA) Alloy Foundry and Die Castings
• Effective Date: 01-Feb-2013
• Referred By: ASTM B252-92(2020) - Standard Guide for Preparation of Zinc Alloy Die Castings for Electroplating and Conversion Coatings
• Effective Date: 01-Feb-2013
• Referred By: ASTM E784-89(2022) - Standard Specification for Clamps, Utility, Laboratory, and Holders, Buret and Clamp
• Effective Date: 01-Feb-2013
• Referred By: ASTM F3160-21 - Standard Guide for Metallurgical Characterization of Absorbable Metallic Materials for Medical Implants
• Effective Date: 01-Feb-2013
• Referred By: ASTM C1804-20 - Standard Specification for Spun Cast Prestressed Concrete Bases for Tapered Steel Lighting Poles
• Effective Date: 01-Feb-2013
• Referred By: ASTM B949-23 - Standard Specification for General Requirements for Zinc and Zinc Alloy Products
• Effective Date: 01-Feb-2013
• Referred By: ASTM B240-22 - Standard Specification for Zinc and Zinc-Aluminum (ZA) Alloys in Ingot Form for Foundry and Die Castings
• Effective Date: 01-Feb-2013

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
Designation:B86 −13
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 Department of Defense.
1. Scope* as provided by the manufacturer, to establish appropriate
safety and health practices, and determine the applicability of
1.1 This specification covers commercial zinc, zinc-
regulatory limitations prior to use.
aluminumcastingsandcontinuouscastbarstock,asdesignated
and specified in Table 1. Seven alloy compositions are speci-
2. Referenced Documents
fied and designated as follows:
2.1 The following documents of the issue in effect on date
A
Common Traditional ASTM UNS
of order acceptance form a part of this specification to the
B
Alloy 3 Zamak 3 AG 40A Z33525
extent referenced herein:
Alloy 7 Zamak 7 AG 40B Z33527
2
B
Alloy 5 Zamak 5 AC 41A Z35533 2.2 ASTM Standards:
Alloy 2 Zamak 2 AC 43A Z35545
B240 Specification for Zinc and Zinc-Aluminum (ZA) Al-
ZA-8 ZA-8 . Z35638
loys in Ingot Form for Foundry and Die Castings
ZA-12 ZA-12 . Z35633
ZA-27 ZA-27 . Z35841
B275 Practice for Codification of Certain Nonferrous Metals
and Alloys, Cast and Wrought
A
See Table 1, Footnote C.
B557 Test Methods for Tension Testing Wrought and Cast
B
SAE Specification, Nos. 903 and 925 conform to the requirements for alloys
Aluminum- and Magnesium-Alloy Products
AG40A and AC41A, respectively.
B899 Terminology Relating to Non-ferrous Metals and Al-
1.2 Zinc Alloys Z33525, Z33527, Z35533, and Z35545 are
loys
used primarily in the manufacture of pressure die castings.
B949 Specification for General Requirements for Zinc and
Zinc-AluminumAlloys Z35638, Z35633, and Z35841 are used
Zinc Alloy Products
in the manufacture of both foundry and pressure die castings.
E8 Test Methods for Tension Testing of Metallic Materials
These alloys are also fabricated into continuous cast bar stock
E23 Test Methods for Notched Bar Impact Testing of Me-
used for prototyping and screw machine stock.
tallic Materials
1.3 The values stated in inch-pound units are to be regarded
E29 Practice for Using Significant Digits in Test Data to
as standard. The values given in parentheses are mathematical
Determine Conformance with Specifications
conversions to SI units that are provided for information only
E88 Practice for Sampling Nonferrous Metals andAlloys in
and are not considered standard.
Cast Form for Determination of Chemical Composition
E527 Practice for Numbering Metals and Alloys in the
1.4 Systems of nomenclature used to designate zinc and
Unified Numbering System (UNS)
zinc-aluminum (ZA) alloys used for casting are described in
E536 Test Methods for ChemicalAnalysis of Zinc and Zinc
Appendix X1.
Alloys
1.5 This standard does not purport to address all of the
E634 Practice for Sampling of Zinc and Zinc Alloys by
safety concerns, if any, associated with its use. It is the
Spark Atomic Emission Spectrometry
responsibility of the user of this standard to become familiar
3
2.3 North American Die Casting Association (NADCA):
with all hazards including those identified in the appropriate
NADCA Product Specification Standards for Die Castings
Material Safety Data Sheet (MSDS) for this product/material
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 Feb. 1, 2013. Published March 2013. Originally the ASTM website.
3
approved in 1931. Last previous edition approved in 2011 as B86 – 11. DOI: Available from North American Die Casting, Assn., 2000 5th Ave., River
10.1520/B0086-13. Grove, IL 60171, http://www.diecasting.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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B86−13
TABLE 1 Chemical Requirements
A,B,C,D A,B,C,D,E A,B,C,D A,C,,D A,C,F A,C,F A,C,F
Alloy 3 Alloy 7 Alloy 5 Alloy 2 ZA-8 ZA-12 ZA-27
Element Zamak 3 Zamak 7 Zamak 5 Zamak 2 ZA-8 ZA-12 ZA-27
(AG40A) (AG40B) (AC41A) (AC43A)
(Z33525) (Z33527) (Z35533) (Z35545) (Z35638) (Z35633) (Z35841)
Aluminum 3.7-4.3 3.7-4.3 3.7-4.3 3.7-4.3 8.0-8.8 10.5-11.5 25.0-2
...

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: B86 − 11 B86 − 13
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 Department of Defense.
1. Scope*
1.1 This specification covers commercial zinc, zinc-aluminum castings and continuous cast bar stock, as designated and
specified in Table 1. Seven alloy compositions are specified and designated as follows:
A
Common Traditional ASTM UNS
B
Alloy 3 Zamak 3 AG 40A Z33520
Alloy 7 Zamak 7 AG 40B Z33523
B
Alloy 5 Zamak 5 AC 41A Z35531
Alloy 2 Zamak 2 AC 43A Z35541
ZA-8 ZA-8 . Z35636
ZA-12 ZA-12 . Z35631
ZA-27 ZA-27 . Z35841
_________
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
A
See Table 1, Footnote C.
B
SAE Specification, Nos. 903 and 925 conform to the requirements for alloys AG40A and AC41A, respectively.
1.2 Zinc Alloys Z33520, Z33523, Z35531, and Z35541Z33525, Z33527, Z35533, and Z35545 are used primarily in the
manufacture of pressure die castings. Zinc-Aluminum Alloys Z35636, Z35631,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 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.
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 June 1, 2011Feb. 1, 2013. Published July 2011March 2013. Originally approved in 1931. Last previous edition approved in 20102011 as
B86 - 10a.B86 – 11. DOI: 10.1520/B0086-11.10.1520/B0086-13.
*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 ----------------------
B86 − 13
TABLE 1 Chemical Requirements
colwidth="0.87in"/COLSPEC
A,B,C,D A,B,C,D,E A,B,C,D A,C,,D A,C,F A,C,F A,C,F
Alloy 3 Alloy 7 Alloy 5 Alloy 2 ZA-8 ZA-12 ZA-2ZA-27
Zamak 3 Zamak 7 Zamak 5 Zamak 2 ZA-8 ZA-12 ZA-27
Element
(AG40A) (AG40B) (AC41A) (AC43A) Z35636 Z35631 Z35841
Z33520 Z33523 Z35531 Z35541 †
(Z33525) (Z33527) (Z35533) (Z35545) (Z35638) (Z35633) (Z35841)
Aluminum 3.7-4.3 3.7-4.3 3.7-4.3 3.7-4.3 8.0-8.8 10.5-11.5 25.0-28.0
G G
Magnesium 0.02-0.06 0.005-0.020 0.02-0.06 0.02-0.06 0.01-0.03 0.01-0.03 0.01-0.02
H E
Copper 0.1 max 0.1 max 0.7-1.2 2.6-3.3 0.8-1.3 0.5-1.2 2.0-2.5
Iron, max 0.05 0.05 0.05 0.05 0.075 0.075 0.075
Lead, max 0.005 0.003 0.005 0.005 0.006 0.006 0.006
Cadmium, max 0.004 0.002 0.004 0.004 0.006 0.006 0.006
Tin, max 0.002 0.001 0.002 0.002 0.003 0.003 0.003
Nickel . . . 0.005-0.020 . . . . . . . . . . . . . . .
I
Zinc remainder remainder remainder remainder remainder remainder remainder
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
...