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1.1 This specification covers a group of requirements that are mandatory for castings produced by the investment casting process to meet the metallurgical requirements of the following steel casting specifications issued by ASTM.
|ASTM Designation||Title of Specification|
|A 27/A 27M||Steel Castings, Carbon, for General Application|
|A 148/A 148M||Steel Castings, High-Strength, for Structural Purposes|
|A 297/A 297M||Steel Castings, Iron-Chromium and Iron-Chromium-Nickel, Heat-Resistant, for General Application|
|A 447/A 447M ||Steel Castings, Chromium-Nickel-Iron Alloy (25-12 Class), for High-Temperature Service|
|A 494/A 494M||Castings, Nickel and Nickel Alloy|
|A 560/A 560M||Castings, Chromium-Nickel Alloy|
|A 732/A 732M||Castings, Investment, Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures|
|A 743/A 743M||Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion-Resistant, for General Application|
|A 744/A 744M||Castings, Iron-Chromium-Nickel, Corrosion Resistant, for Severe Service|
|A 747/A 747M||Steel Castings, Stainless, Precipitation Hardening|
|A 890/A 890M||Castings, Iron-Chromium-Nickel-Molybdenum Corrosion-Resistant, Duplex (Austenitic/Ferritic) for General Application|
|A 915/A 915M||Steel Castings, Carbon and Alloy, Chemical Requirements Similar to Standard Wrought Grades|
1.2 This specification also covers a group of supplementary requirements that may be applied to the above specifications as indicated therein. These are provided for use when additional testing or inspection is desired and apply only when specified individually by the purchaser in the order.
1.3 When investment castings are ordered, the requirements stated in this specification form an integral part of the material specification. In cases of conflict, the requirements of this specification shall take precedence over the individual material specification requirements.
1.4 The values stated in either inch-pound 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 A 957 and SI units for material ordered to Specification A 957M.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A27/A27M Specification for Steel Castings, Carbon, for General Application
A128/A128M Specification for Steel Castings, Austenitic Manganese
A148/A148M Specification for Steel Castings, High Strength, for Structural Purposes
A297/A297M Specification for Steel Castings, Iron-Chromium and Iron-Chromium-Nickel, Heat Resistant, for General Application
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A380 Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems
A447/A447M Specification for Steel Castings, Chromium-Nickel-Iron Alloy (25-12 Class), for High-Temperature Service
A488/A488M Practice for Steel Castings, Welding, Qualifications of Procedures and Personnel
A494/A494M Specification for Castings, Nickel and Nickel Alloy
A560/A560M Specification for Castings, Chromium-Nickel Alloy
A609/A609M Practice for Castings, Carbon, Low-Alloy, and Martensitic Stainless Steel, Ultrasonic Examination Thereof
A732/A732M Specification for Castings, Investment, Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures
A743/A743M Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application
A744/A744M Specification for Castings, Iron-Chromium-Nickel, Corrosion Resistant, for Severe Service
A747/A747M Specification for Steel Castings, Stainless, Precipitation Hardening
ICS Number Code 77.100 (Ferroalloys)
UNSPSC Code 31101903(Steel investment casting)
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ASTM A957 / A957M-08, Standard Specification for Investment Castings, Steel and Alloy, Common Requirements, for General Industrial Use, ASTM International, West Conshohocken, PA, 2008, www.astm.orgBack to Top