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1.1 This specification covers carbon and alloy steel castings for pressure-containing and other applications intended primarily for petroleum and gas pipelines in areas subject to low-ambient temperatures. Castings shall be heat treated by normalizing and tempering or liquid quenching and tempering. All classes are weldable under proper conditions. Hardenability of some grades may limit usable section size.
1.2 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. Inch-pound units are applicable for material ordered to Specification A757 and SI units for material ordered to Specification A757M.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A488/A488M Practice for Steel Castings, Welding, Qualifications of Procedures and Personnel
A703/A703M Specification for Steel Castings, General Requirements, for Pressure-Containing Parts
A941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys
A985/A985M Specification for Steel Investment Castings General Requirements, for Pressure-Containing Parts
American Society of Mechanical EngineersASME Boiler and Pressure Vessel Code
Manufacturers Standardization Society of the Valve and Fittings Industry StandardsMSS SP-55 Quality Standard for Steel Castings for Valves, Flanges, Fittings, and Other Piping Components - Visual Method for Evaluation of Surface Irregularities
ICS Number Code 77.140.80 (Iron and steel castings)
UNSPSC Code 31101602(Ferrous alloy sand casting)
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ASTM A757 / A757M-00(2004), Standard Specification for Steel Castings, Ferritic and Martensitic, for Pressure-Containing and Other Applications, for Low-Temperature Service, ASTM International, West Conshohocken, PA, 2004, www.astm.orgBack to Top