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ASTM B327-16

Historical Revision

Standard Specification for Master Alloys Used in Making Zinc Die Casting Alloys

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1.1 This specification covers aluminum–base and zinc–base master alloys used to make zinc die-casting alloys. Alloy compositions specified for aluminum–base master alloys (hardeners) are designated as shown in Table 1. Alloy compositions specified for the zinc-base master alloys are designated as shown in Table 2.

(A) Carried to one additional decimal place to ensure proper control in the final alloy.
(B) ASTM alloy designations were established in accordance with Practice B275.
(C) ASTM Specification B6, for Zinc.
(A) Zinc-base master alloys V12-3 (Z33730) and V12-5 (Z35740) used for producing die casting alloys may contain nickel, chromium, silicon, and manganese 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 in die casting alloys and, therefore, analyses are not required for these elements, except that nickel analysis is required when producing die casting alloy Z33526.
(B) The UNS assignations were established in accordance with Practice E527.
(C) For purposes of determining conformance with this specification, the observed value or calculated value obtained from analysis shall be rounded off “to the nearest unit” in the last right hand place of figures used in expressing the specified limit, in accordance with the rounding method of Practice E29.
(D) Refer to Practice B908. (Note: Color Codes indicated are for North American applications.)

1.2 Aluminum alloy hardeners are added to Special High Grade zinc (per Specification B6) in the proper alloying ratios, as shown in Table 1, to produce zinc alloys for die casting.

1.3 Zinc-base master alloy is added to Special High Grade zinc (per Specification B6) in the proper alloying ratio, as shown in Table 3, to produce zinc alloy for die casting.

(A) Jumbo ingots outside the above weight limits may be acceptable depending upon the chemistry, if mutually agreed upon between the producer and purchaser.
(B) ASTM alloy designations were established in accordance with Practice B275.

1.4 Master alloys may be supplied in the form of shot, bar, ingot or jumbo ingot as specified by the purchaser.

1.5 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.

1.6 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 and health practices, and determine the applicability of regulatory limitations prior to use.


This specification covers aluminum-base and zinc-base master alloys used to make zinc die-casting alloys. The material may be made by any suitable process. The material covered by this specification shall be of uniform quality and shall be free of dross, flux, or other harmful contamination. If the material is in shot form, it shall be sound, uniform size, and free of a heavily oxidized surface coating, stringers, and moisture. Aluminum-base master alloys (hardeners) shall be tested and conform to the required chemical composition for aluminum, copper, iron, silicon, manganese, magnesium, zinc, chromium, nickel, tin, lead, and cadmium. Zinc-base master alloys shall conform to the color code requirements and to the required alloy composition for aluminum, magnesium, iron, copper, lead, cadmium, tin, and zinc. The weight of jumbo ingots shall conform to the required weight limits.


SDO ASTM: ASTM International
Document Number B327
Publication Date May 1, 2016
Language en - English
Page Count 4
Revision Level 16
Supercedes
Committee B02.04
Publish Date Document Id Type View
Nov. 1, 2021 B0327-21 Revision
May 1, 2016 B0327-16 Revision
Aug. 1, 2013 B0327-13A Revision
Feb. 1, 2013 B0327-13 Revision
May 1, 2012 B0327-12 Revision
Oct. 1, 2009 B0327-09AE01 Revision
Oct. 1, 2009 B0327-09A Revision
April 15, 2009 B0327-09 Revision
Nov. 1, 2008 B0327-08 Revision
May 10, 2001 B0327-98E01 Revision
May 10, 2001 B0327-01E02 Revision
May 10, 2001 B0327-01E01 Revision
Nov. 1, 2005 B0327-01R05 Reaffirmation