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About This Item
Full Description
The various standardizing organizations involved with the individual industries apply their own established criteria to define the status of a metal or alloy in terms of when a UNS designation number will be assigned. For instance, ASTM Committee A01 requires details of heat analysis, mechanical properties, and processing requirements for addition of a new grade or alloy to its specifications. The Copper Development Association requires that the material be "in commercial use (without tonnage limits);" the Aluminum Association requires that the alloy be "offered for sale (not necessarily in commercial use);" the SAE Aerospace Materials Division calls for "repetitive procurement by at least two users."
Thus, while no universal definition for usage criteria is established, the UNS numbers are intended to identify metals and alloys that are generally in regular production and use. A UNS number will not ordinarily be issued for a material that has just been conceived or that is still in only experimental trial.
Document History
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ASTM E527-23
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Standard Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)- Most Recent
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ASTM E527-16
Standard Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)- Historical Version
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ASTM E527-12
Standard Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)- Historical Version
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ASTM E527-07
Standard Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)- Historical Version
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ASTM E527-83(2003)
Standard Practice for Numbering Metals and Alloys (UNS)- Historical Version
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ASTM E527-83(1997)e1
Standard Practice for Numbering Metals and Alloys (UNS)- Historical Version