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This specification covers magnesium alloy permanent mold casting. The castings may be subjected to the heat treatment necessary to produce material that will conform to the requirements specified. Heat treatment shall be performed on the whole of a casting, never on a part only, and shall be applied in a manner that will produce the utmost uniformity. The castings shall be of uniform quality and condition, free of cracks or other injurious defects, and shall be well cleaned by sand blasting or any other approved process before inspection. The material shall conform to the chemical composition limits prescribed. Any suitable method of chemical analysis may be used. Unless otherwise specified, heat treatment for the applicable tempers designated shall be in accordance with practice B 661 or with Military Specification MIL-M-6857. The tension test specimens representing the castings shall conform to the requirements specified. At least one tension test specimen shall be cast from each melt of 2000 lb (907 kg) or fraction thereof to represent the castings poured from the same melt. The tension tests shall be made in accordance with test methods B 557.
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 magnesium alloy permanent mold casting alloys designated as shown in Table 1.
1.2 The values stated in inch-pound units are to be regarded as the standard. The SI values given in parentheses are provided for information only.
1.3 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 establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
B93/B93M Specification for Magnesium Alloys in Ingot Form for Sand Castings, Permanent Mold Castings, and Die Castings
B296 Practice for Temper Designations of Magnesium Alloys, Cast and Wrought
B557 Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products
B660 Practices for Packaging/Packing of Aluminum and Magnesium Products
B661 Practice for Heat Treatment of Magnesium Alloys
B951 Practice for Codification of Unalloyed Magnesium and Magnesium-Alloys, Cast and Wrought
B953 Practice for Sampling Magnesium and Magnesium Alloys for Spectrochemical Analysis
B954 Test Method for Analysis of Magnesium and Magnesium Alloys by Atomic Emission Spectrometry
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E88 Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical Composition
E94 Guide for Radiographic Examination
E155 Reference Radiographs for Inspection of Aluminum and Magnesium Castings
E165 Practice for Liquid Penetrant Examination for General Industry
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
Federal StandardsFed. Std. No. 123 Marking for Shipment (Civil Agencies) Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://www.dodssp.daps.mil.
Aerospace Materials SpecificationAMS 2768 Heat Treatment of Magnesium Alloy Castings
ICS Number Code 77.150.20 (Magnesium products)
UNSPSC Code 31121001(Non ferrous alloy v process machined castings)
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ASTM B199-17, Standard Specification for Magnesium-Alloy Permanent Mold Castings, ASTM International, West Conshohocken, PA, 2017, www.astm.orgBack to Top