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1.1 This specification covers iron-chromium-nickel alloy, stainless steel castings intended for particularly severe corrosive applications.
1.2 This specification requires postweld heat-treatment of all weld repairs affecting surfaces intended to be wetted by the corrosive medium. For applications for which postweld heat-treatment is not considered mandatory for retention of acceptable corrosion resistance, refer to Specification A743/A743M.
Note 1—For general corrosion-resistant alloy castings, reference should be made to Specification A743/A743M. For general heat-resistant alloy castings, reference should be made to Specification A297/A297M. For nickel-base alloy castings, refer to Specification A494/A494M.
1.3 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 A744 and SI units for material ordered to Specification A744M.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
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
A494/A494M Specification for Castings, Nickel and Nickel Alloy
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
A781/A781M Specification for Castings, Steel and Alloy, Common Requirements, for General Industrial Use
A957 Specification for Investment Castings, Steel and Alloy, Common Requirements, for General Industrial Use
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
American Welding Society StandardsAWS A5.11 Specification for Nickel and Nickel Alloy Covered Welding Electrodes AWS A5.14 Specification for Nickel and Nickel Alloy Bare Welding Rods and Electrodes
ICS Number Code 77.140.80 (Iron and steel castings)
UNSPSC Code 31100000(Castings and casting assemblies)