ASTM A788/A788M-05c
(Specification)Standard Specification for Steel Forgings, General Requirements
Standard Specification for Steel Forgings, General Requirements
SCOPE
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:
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 ) 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 ) and certification (see Section ) shall reflect the extent to which the product specification requirements have been met.
1.5 As noted in the Certification Section (), the number and year date of this specification, as well as that of the product specification, are required to be included in the product certification.
1.6 When the SI version of a product specification is required by the purchase order, Specification A 788/A 788M shall be used.
1.7 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.8 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: A 788/A 788M – 05c
Standard Specification for
1
Steel Forgings, General Requirements
This standard is issued under the fixed designationA 788/A 788M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope*
A 668/A 668M Steel Forgings, Carbon and Alloy, for General
Industrial Use
2
1.1 This specification covers a group of common require-
A 723/A 723M Alloy Steel Forgings for High-Strength Pres-
ments that, unless otherwise specified in the individual product
sure Component Application
A 765/A 765M Carbon Steel and Low-Alloy Steel Pressure-
specification, shall apply to steel forgings under any of the
Vessel-Component Forgings with Manda-
following specifications issued by ASTM:
tory Toughness Requirements
ASTM A 768/A 768M Vacuum-Treated 12 % Chromium Alloy Steel
Forgings for Turbine Rotors and Shafts
Designation Title
A 266/A 266M Carbon Steel Forgings for Pressure Vessel A 837/A 837M Steel Forgings, Alloy, for Carburizing Applica-
tions
Components
A 288 Carbon and Alloy Steel Forgings for Magnetic A 859/A 859M Age-Hardening Alloy Steel Forgings for Pres-
sure Vessel Components
Retaining Rings for Turbine Generators
A 289/A 289M Alloy Steel Forgings for Nonmagnetic Retain- A 891 Precipitation Hardening Iron Base Superalloy
Forgings for Turbine Rotor Disks and
ing Rings for Generators
Wheels
A 290 Carbon and Alloy Steel Forgings for Rings for
A 909 Steel Forgings, Microalloy, for General Indus-
Reduction Gears
trial Use
A 291/A 291M Steel Forgings, Carbon and Alloy, for Pinions,
A 940 Vacuum Treated Steel Forgings, Alloy, Differ-
Gears, and Shafts for Reduction Gears
entially Heat Treated, for Turbine Rotors
A 336/A 336M Alloy Steel Forgings for Pressure and High-
A 965/A 965M Steel Forgings, Austenitic, for Pressure and
Temperature Parts
High Temperature Parts
A 372/A 372M Carbon and Alloy Steel Forgings for Thin-
A 983M/A 983M Specification for Continous Grain Flow
Walled Pressure Vessels
Forged Carbon and Alloy Steel Crankshafts
A 427 Wrought Alloy Steel Rolls for Cold and Hot
for Medium Speed Diesel Engines
Reduction
A 1021/A 1021M Martensitic Stainless Steel Forgings and
A 469/A 469M Vacuum-Treated Steel Forgings for Generator
Forging Stock for High-Temperature Ser-
Rotors
vice
A 470/A 470M Vacuum-Treated Carbon and Alloy Steel
Forgings for Turbine Rotors and Shafts
1.2 In case of conflict in requirements, the requirements of
A 471 Vacuum-Treated Alloy Steel Forgings for Tur-
bine Rotor Disks and Wheels
the individual product specifications shall prevail over those of
A 508/A 508M Quenched and Tempered Vacuum-Treated
this specification.
Carbon and Alloy Steel Forgings for Pres-
1.3 The purchaser may specify additional requirements (see
sure Vessels
A 521 Steel, Closed-Impression Die Forgings for
4.2.3) that do not negate any of the provisions of either this
General Industrial Use
specification or of the individual product specifications. The
A 541/A 541M Quenched and Tempered Carbon and Alloy
acceptance of any such additional requirements shall be
Steel Forgings for Pressure Vessel Compo-
nents
dependent on negotiations with the supplier and must be
A 579/A 579M Superstrength Alloy Steel Forgings
included in the order.
A 592/A 592M High-Strength Quenched and Tempered Low-
1.4 If, by agreement, forgings are to be supplied in a
Alloy Steel Forged Fittings and Parts for
Pressure Vessels
partially completed condition, that is, all of the provisions of
A 649/A 649M Forged Steel Rolls Used for Corrugating Pa-
the product specification have not been filled, then the material
per Machinery
marking (see Section 17) and certification (see Section 16)
shall reflect the extent to which the product specification
1 requirements have been met.
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel, and RelatedAlloys, and is the direct responsibility of Subcommittee 1.5 As noted in the Certification Section (16), the number
A1.06 on Steel Forgings and Billets.
andyeardateofthisspecification,aswellasthatoftheproduct
Current edition approved Oct. 1, 2005. Published October 2005. Originally
specification, are required to be included in the product
approved in 1984. Last previous edition approved in 2005 as A 788 – 05b.
2
certification.
For ASME Boiler and Pressure Vessel Code applications, see related Specifi-
cation SA–788 in Section II of that code.
*A Summary of Changes section appears at the end of this standard.
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