ASTM B86-09b

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

ASTM International, 10/01/2009

Publisher: ASTM

File Format: PDF

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Published:01/10/2009

Pages:8

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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	Z33520
Alloy 7	Zamak 7	AG 40B	Z33523
Alloy 5	Zamak 5	AC 41A ^B	Z35531
Alloy 2	Zamak 2	AC 43A	Z35541
ZA-8	ZA-8	...	Z35636
ZA-12	ZA-12	...	Z35631
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 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.

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

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Element	Alloy 3^A^,^B^,^C^,^D Zamak 3 (AG40A) Z33520	Alloy 7^A^,^B^,^C^,^D Zamak 7 (AG40B) Z33523	Alloy 5^A^,^B^,^C^,^D Zamak 5 (AC41A) Z35531	Alloy 2^A^,^C^,^,^D Zamak (AC43A) Z355412	ZA-8^A^,^C^,^E ZA-8 Z35636	ZA-12^A^,^C^,^E ZA-12 Z35631	ZA-2^A^,^C^,^E ZA-27 Z35841
Aluminum	3.7-4.3	3.5-4.3	3.7-4.3	3.7-4.3	8.0-8.8	10.5-11.5	25.0-28.0
Magnesium	0.02-0.06^F	0.005-0.020	0.02-0.06^F	0.02-0.06	0.01-0.03	0.01-0.03	0.01-0.02
Copper	0.1 max^G	0.25 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	0.075	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

ASTM B86-09b

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

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