ASTM-B86 2011

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B86-11 Standard Specification for Zinc and Zinc-Aluminum (ZA) Alloy Foundry and Die Castings

Published By	Publication Date	Number of Pages
ASTM	2011	8

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Categories: 77.150.60 - Lead, zinc and tin products, ASTM

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Description

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 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 Z35541 are used primarily in the manufacture of pressure die castings. Zinc-Aluminum Alloys Z35636, Z35631, 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.

TABLE 1 Chemical Requirements

^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 Z33522.

^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 are not required for these elements.

^G Magnesium may be as low as 0.015 % provided that the lead, cadmium, and tin do not exceed 0.003, 0.003, and 0.001 %, respectively.

^H For the majority of commercial applications, a copper content of up to 0.7 % will not adversely affect the serviceability of 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, such as to meet the requirements of ISO 15201.

^I Determined arithmetically by difference.

Corrected editorially.

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents
2	Terminology Ordering Information TABLE 1
3	Material Chemical Requirements Physical Properties, Mechanical Properties and Tests Dimensions, Mass, and Permissible Variations Source Inspection Rejection and Rehearing Certification Identification Marking Preparation for Delivery
4	General Quality Quality Assurance Keywords X1. NOMENCLATURE SYSTEMS FOR ZINC AND ZINC-ALUMINUM (ZA) ALLOYS X1.1 X1.2 TABLE X1.1
5	X2. TYPICAL MECHANICAL PROPERTIES OF ZINC AND ZINC-ALUMINUM ALLOY TEST SPECIMENS X2.1 X2.2
6	X3. PHYSICAL PROPERTIES OF ZINC AND ZINC-ALUMINUM (ZA) ALLOY X3.1 TABLE X2.1
7	X4. METRIC EQUIVALENTS X4.1 TABLE X3.1

Additional information

Tin, max	0.002
Cadmium, max	0.004
Copper	0.1 max H
Magnesium	0.02-0.06 G
ZA-8	ZA-8
Alloy 2	Zamak 2
Nickel	. . .
ZA-27	ZA-27
Alloy 3	Zamak 3
_________
ZA-12	ZA-12
Lead, max	0.005
Iron, max	0.05
Alloy 5	Zamak 5
Aluminum	3.7-4.3
Alloy 7	Zamak 7
Zinc I	remainder

ICS Codes	77.150.60 - Lead, zinc and tin products

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