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1.1 This specification covers a group of common requirements that, unless otherwise specified in the individual product specification, shall apply to steel forgings under any of the following specifications issued by ASTM:

ASTM DesignationTitleA 266Forgings, Carbon Steel for Pressure Vessel ComponentsA 288Carbon and Alloy Steel Forgings for Magnetic Retaining Rings for Turbine GeneratorsA 289Alloy Steel Forgings for Nonmagnetic Retaining Rings for GeneratorsA 290Carbon and Alloy Steel Forgings for Rings for Reduction GearsA 291Carbon and Alloy Steel Forgings for Pinions and Gears for Reduction GearsA 336Steel Forgings, Alloy, for Pressure and High-Temperature PartsA 372Carbon and Alloy Steel Forgings for Thin-Walled Pressure VesselsA 427Wrought Alloy Steel Rolls for Cold and Hot ReductionA 469Vacuum-Treated Steel Forgings for Generator RotorsA 470Vacuum-Treated Carbon and Alloy Steel Forgings for Turbine Rotors and ShaftsA 471Vacuum-Treated Alloy Steel Forgings for Turbine Rotor Disks and WheelsA 508/A 508MQuenched and Tempered Vacuum-Treated Carbon and Alloy Steel Forgings Pressure VesselsA 521Steel Closed-Impression Die Forgings for General Industrial UseA 541/A 541MSteel Forgings, Carbon and Alloy, Quenched and Tempered, for Pressure Vessel ComponentsA 579Superstrength Alloy Steel ForgingsA 592High-Strength Quenched and Tempered Low-Alloy Steel Forged Fittings and Parts for Pressure VesselsA 649/A 649MForged Steel Rolls Used for Corrugating Paper MachineryA 668/A 668MSteel Forgings Carbon and Alloy for General Industrial UseA 723/A 723MAlloy Steel Forgings for High-Strength Pressure Component ApplicationA 765/A 765MCarbon Steel and Low-Alloy Steel Pressure Vessel Component Forgings with Mandatory Toughness RequirementsA 768Vacuum-Treated 12 % Chromium Alloy Steel Forgings for Turbine Rotors and ShaftsA 837 Steel Forgings, Alloy, For Carburizing ApplicationsA 859/A 859MSteel Forgings, Low-Carbon Age-Hardening Nickel-Copper-Chromium-Molybdenum Alloy Steel, for Pressure Vessel ComponentsA 891 Precipitation Hardening Iron Base Superalloy Forgings for Turbine Rotor Disks and Wheels A 909Specification for Steel Forgings, Microalloy, for General Industrial UseA 940Specification for Vacuum Treated Steel Forgings, Alloy, Differentially Heat Treated, for Turbine RotorsA 965/A 965MSpecification for Steel Forgings, Austenitic, for Pressure and High Temperature PartsA 1021Specification for Martensitic Stainless Steel Forgings and Forging Stock for High-Temperature Service

1.2 In case of conflict in requirements, the requirements of the individual product specifications shall prevail over those of this specification.

1.3 The purchaser may specify additional requirements (see 4.2.3) that do not negate any of the provisions of either this specification or of the individual product specifications. The acceptance of any such additional requirements shall be dependent on negotiations with the supplier and must be included in the order.

1.4 If, by agreement, forgings are to be supplied in a partially completed condition, that is, all of the provisions of the product specification have not been filled, then the material marking (see Section 17) and certification (see Section 16) shall reflect the extent to which the product specification requirements have been met.