This practice covers a system for designating cast and wrought nonferrous metals and alloys. It was originally adopted for light metals and alloys that are cast and wrought and later extended to heavier base-metal die-casting alloys. Chemical composition limits serve as the basis for the Unified Numbering System (UNS) designations. The temper designations used for all metal forms, except for ingots, follow the alloy designation.
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1.1 This practice covers a system originally adopted for designating light metals and alloys, cast and wrought, and later extended to certain heavier, base-metal die-casting alloys. Those designations, which are currently being used in specifications under the jurisdiction of Committees B02 on Nonferrous Metals and Alloys and B07 on Light Metals and Alloys, are listed in Table X2.1.
1.1.1 The alloy designations now being used in Committee B07 specifications for aluminum and aluminum-alloy wrought and cast products conform to ANSI H35.1. Alloys formerly codified by this practice and the corresponding ANSI designations are shown in Tables X3.1 and X3.2.
1.2 This practice also provides a system for designating magnesium alloys that have been used commercially since 1952, and thus is intended to be the registration source for new magnesium alloys. A record of designations along with the established compositions is given in Table X4.1.
1.3 The equivalent Unified Numbering System (UNS) alloy designations shown in the appendixes are in accordance with Practice E 527.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
B37 Specification for Aluminum for Use in Iron and Steel Manufacture
B80 Specification for Magnesium-Alloy Sand Castings
B86 Specification for Zinc and Zinc-Aluminum (ZA) Alloy Foundry and Die Castings
B93/B93M Specification for Magnesium Alloys in Ingot Form for Sand Castings, Permanent Mold Castings, and Die Castings
B94 Specification for Magnesium-Alloy Die Castings
B102 Specification for Lead- and Tin-Alloy Die Castings
B240 Specification for Zinc and Zinc-Aluminum (ZA) Alloys in Ingot Form for Foundry and Die Castings
B327 Specification for Master Alloys Used in Making Zinc Die Casting Alloys
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
H35.1 Alloy and Temper Designation Systems for Aluminum
aluminum; lead; magnesium; tin; UNS designations; zinc;
ICS Number Code 77.150.01 (Products of non-ferrous metals in general)
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