ASTM A723/A723M-02

Standard Specification for Alloy Steel Forgings for High-Strength Pressure Component Application

SCOPE
1.1 This specification covers requirements for high-strength quenched and tempered alloy steel forgings for pressure vessels, isostatic presses, shock tubes, and similar components.
1.2 These materials are not intended for welded construction.
1.3 Three grades of nickel-chromium-molybdenum steels and six classes of increasing tensile strength are included. The strength class, section size, and configuration of the forging will largely dictate the applicable type(s) of steel.
1.4 The values stated in either inch-pound units or SI (metric) units are to be regarded separately as the standard. 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 independently of the other. Combining values from the two systems may result in nonconformance with the specification.
1.5 Unless the order specifies the applicable "M" specification designation, the material shall be furnished to the inch-pound units.

General Information

• Status: Historical
• Publication Date: 09-Sep-2002
• ICS: 77.140.30 - Steels for pressure purposes
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.06 - Steel Forgings and Billets

Relations

• Replaces: ASTM A723/A723M-94(1999) - Standard Specification for Alloy Steel Forgings for High-Strength Pressure Component Application
• Effective Date: 10-Sep-2002
• Replaced By: ASTM A723/A723M-08 - Standard Specification for Alloy Steel Forgings for High-Strength Pressure Component Application
• Effective Date: 01-Mar-2008
• Referred By: ASTM A788/A788M-23 - Standard Specification for Steel Forgings, General Requirements
• Effective Date: 10-Sep-2002

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: A 723/A 723M – 02
Standard Specification for
Alloy Steel Forgings for High-Strength Pressure Component
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Application
This standard is issued under the fixed designationA723/A723M; 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.
1. Scope* 3. Ordering Information and General Requirements
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1.1 This specification covers requirements for high- 3.1 In addition to the ordering information required by
strength quenched and tempered alloy steel forgings for pres- Specification A 788, the purchaser shall include with the
sure vessels, isostatic presses, shock tubes, and similar com- inquiry and order a detailed drawing, sketch, or written
ponents. description of the forging and the method of selecting test
1.2 These materials are not intended for welded construc- location (see 6.2). When appropriate, the areas of significant
tion. loading in the forging shall be designated.
1.3 Three grades of nickel-chromium-molybdenum steels 3.2 Material supplied to this specification shall conform to
and six classes of increasing tensile strength are included. The the requirements of Specification A 788, which outlines addi-
strength class, section size, and configuration of the forging tional ordering information, manufacturing requirements, test-
will largely dictate the applicable type(s) of steel. ing and retesting methods and procedures, marking, certifica-
1.4 The values stated in either inch-pound units or SI tion, product analysis variations, and additional supplementary
(metric) units are to be regarded separately as the standard. requirements.
Within the text and tables, the SI units are shown in brackets. 3.3 If the requirements of this specification are in conflict
The values stated in each system are not exact equivalents; with the requirements of SpecificationA 788, the requirements
therefore,eachsystemmustbeusedindependentlyoftheother. of this specification shall prevail.
Combining values from the two systems may result in noncon-
4. Materials and Manufacture
formance with the specification.
4.1 Melting Practice—The steel melting procedures of
1.5 Unless the order specifies the applicable “M” specifica-
Specification A 788 shall apply except that the open-hearth
tion designation, the material shall be furnished to the inch-
pound units. process shall not be used, and that the steel shall be vacuum
degassed prior to or during the pouring of the ingot, in order to
2. Referenced Documents
remove objectionable gases, particularly hydrogen.
2.1 ASTM Standards: 4.1.1 Use of secondary remelting or refining operations may
A 275/A 275M Test Method for Magnetic Particle Exami- be considered for particularly demanding applications.
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nation of Steel Forgings 4.2 Discard—Sufficient discard shall be taken from each
A 370 Test Methods and Definitions for MechanicalTesting ingot to secure freedom from piping and excessive segregation.
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of Steel Products 4.3 Heat Treatment:
A 388/A 388M Practice for Ultrasonic Examination of 4.3.1 Forgings shall be rough-machined prior to final heat
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Heavy Steel Forgings treatment if it is necessary to reduce the mass to ensure full
A 788 Specification for Steel Forgings, General Require- hardening or to meet the requirements of 6.2. The risk of
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ments cracking during heat treatment with high-hardenability steels
of the type covered by this specification should be borne in
mind when deciding on the degree of surface preparation
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This specification is under the jurisdiction of ASTM Committee A01 on Steel,
before heat treatment.
Stainless Steel and RelatedAlloys, and is the direct responsibility of Subcommittee
4.3.2 Heat Treatment for Mechanical Properties—Heat
A01.06 on Steel Forgings and Billets.
Current edition approved September 10, 2002. Published January 2003. Origi- treatment shall consist of normalizing (which may be part of
nally approved in 1975. Last previous edition approved in 1994 as
the preliminary treatment), reaustenitization, liquid quenching,
A 723 – 94 (1999).
and tempering. The forgings shall be quenched in a suitable
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For ASME Boiler and Pressure Vessel Code applications see related Specifi-
liquid medium by spraying or immersion. Quenching shall be
cation SA–723/SA–723M in Section II of that Code.
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Annual Book of ASTM Standards, Vol 01.05. followed by tempering at a minimum temperature of 1000°F
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Annual Book of ASTM Standards, Vol 01.03.
*A Summary of Changes section appears at the end of this standard.
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