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1.1 This specification covers commercial zinc and zinc-aluminum (ZA) alloys in ingot form for remelting for the manufacture of pressure die castings, foundry castings and continuous cast bar stock as designated and specified in Table 1. Seven alloy compositions are specified, designated as follows:
|Alloy 3||Zamak 3||AG 40A||Z33521|
|Alloy 7||Zamak 7||AG 40B||Z33522|
|Alloy 5||Zamak 5||AC 41A||Z35530|
|Alloy 2||Zamak 2||AC 43A||Z35540|
A See Table 1, footnote B.
1.2 Zinc alloys Z33521, Z33522, Z35530, and Z35540 are used primarily for remelting in the manufacture of pressure die castings. Zinc-aluminum alloys Z35635, Z35630, and Z35840 are used for remelting in the manufacture of both foundry and pressure die castings. Castings made from these ingots are specified in Specification B 86
1.3 The values stated in inch-pound units are to be regarded as 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 and North American Color Code Requirements
|Alloy 3 A, B, C, D||Alloy 7 A, B, C, D||Alloy 5 A,B ,C ,D||Alloy 2 A,B ,C,D||ZA-8 B, C, E||ZA-12 B, C, E||ZA-27 B, C, E|
|Zamak 3||Zamak 7||Zamak 5||Zamak 2||ZA-8||ZA-12||ZA-27|
|Copper||0.10 max||0.10 max||0.7-1.1||2.7-3.3||0.9-1.3||0.5-1.2||2.0-2.5|
|Nickel||- - -||0.005-0.020||- - -||- - -||- - -||- - -||- - -|
A Zinc alloy ingot for die casting may contain nickel, chromium, silicon, and manganese in amounts of up to 0.02, 0.02, 0.035 and 0.05 %, respectively. 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, except that nickel analysis is required for Z33522.
B ASTM alloy designations were established in accordance with Practice B 275
C 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 E 29.
D When this material is required to conform to ISO Standard 301, the chemical limits for thallium and indium each shall not exceed 0.001 %.
E Zinc-aluminum ingot for foundry and pressure die casting may contain nickel, chromium, and manganese 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.
F Refer to Practice B 908
G Determined arithmetically by difference.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
B86 Specification for Zinc and Zinc-Aluminum (ZA) Alloy Foundry and Die Castings
B275 Practice for Codification of Certain Zinc, Tin and Lead Die Castings
B897 Specification for Configuration of Zinc and Zinc Alloy Jumbo, Block, Half Block, and Slab Ingot
B899 Terminology Relating to Non-ferrous Metals and Alloys
B908 Practice for the Use of Color Codes for Zinc Casting Alloy Ingot
B949 Specification for General Requirements for Zinc and Zinc Alloy Products
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
E536 Test Methods for Chemical Analysis of Zinc and Zinc Alloys
ISO StandardsISO 301 Zinc Alloy Ingots Intended for Casting ISO 3815–1
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ASTM B240-07e1, Standard Specification for Zinc and Zinc-Aluminum (ZA) Alloys in Ingot Form for Foundry and Die Castings, ASTM International, West Conshohocken, PA, 2007, www.astm.orgBack to Top