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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.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
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 . Alloy compositions specified for the zinc-base master alloys are designated as shown in .
1.2 Aluminum alloy hardeners are added to Special High Grade zinc (per Specification ) in the proper alloying ratios, as shown in , to produce zinc alloys for die casting.
1.3 Zinc-base master alloy is added to Special High Grade zinc (per Specification ) in the proper alloying ratio, as shown in , to produce zinc alloy for die casting.
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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
B6 Specification for Zinc
B275 Practice for Codification of Certain Zinc, Tin and Lead Die Castings
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
E34 Test Methods for Chemical Analysis of Aluminum and Aluminum-Base Alloys
E88 Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical Composition
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
E536 Test Methods for Chemical Analysis of Zinc and Zinc Alloys
E1251 Test Method for Analysis of Aluminum and Aluminum Alloys by Spark Atomic Emission Spectrometry
ISO StandardsISO3815-1 Zinc and zinc alloys Part 1: Analysis of solid samples by optical emission spectrometry ISO3815-2 Zinc and zinc alloys Part 2: Analysis by inductively coupled plasma optical emission spectrometry
ICS Number Code 77.120.10 (Aluminium and aluminium alloys)
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ASTM B327-16, Standard Specification for Master Alloys Used in Making Zinc Die Casting Alloys, ASTM International, West Conshohocken, PA, 2016, www.astm.orgBack to Top