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1.1 This specification covers ferritic steel forgings for boilers, pressure vessels, high-temperature parts, and associated equipment.
1.2 Forgings made of steel grades listed in Specification A 335/A 335M, may also be ordered under this specification. The chemical, tensile, heat treatment, and marking requirements of Specification A 335/A 335M shall apply, except the forging shall conform to the chemical requirements of Tables 1 and 2 of Specification A 335/A 335M only with respect to heat analysis. On check analysis they may deviate from these limits to the extent permitted in of this specification.
1.3 Supplementary Requirements S1 to S9 are provided for use when additional testing or inspection is desired. These shall apply only when specified individually by the purchaser in the order.
1.4 Unless the order specifies the applicable "M" specification designation, the material shall be furnished to the inch-pound units.
1.5 A 336/A 336M formerly included austenitic steel forgings, which are now found in A 965/A 965M.
1.6 The values stated in either inch-pound units or SI (metric) units are to be regarded separately as standards. Within the text and tables, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independent of the other. Combining values from the two systems may result in nonconformance with the specification.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A275/A275M Practice for Magnetic Particle Examination of Steel Forgings
A335/A335M Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A788/A788M Specification for Steel Forgings, General Requirements
A965/A965M Specification for Steel Forgings, Austenitic, for Pressure and High Temperature Parts
E165 Practice for Liquid Penetrant Examination for General Industry
ASME Boiler and Pressure Vessel CodeSectionIX Welding and Brazing Qualifications
AWS SpecificationsA5.29/A5.29M Low-Alloy Steel Electrodes for Flux Cored Arc Welding
ICS Number Code 77.140.85 (Iron and steel forgings)
UNSPSC Code 31132100(Steel forgings)