ASTM A1021-02

Standard Specification for Martensitic Stainless Steel Forgings and Forging Stock for High-Temperature Service

SCOPE
1.1 This specification covers martensitic chromium stainless steel forgings, forged bar, and forging stock for high temperature service. The mechanical properties are developed by suitable heat treatment, as indicated for each alloy.
1.2 The values stated in inch-pound units are to be regarded as standard.

General Information

• Status: Historical
• Publication Date: 09-Sep-2002
• ICS: 77.140.85 - Iron and steel forgings
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.06 - Steel Forgings and Billets

Relations

• Replaces: ASTM A1021-01 - Standard Specification for Martensitic Stainless Steel Forgings and Forging Stock for High-Temperature Service
• Effective Date: 10-Sep-2002
• Replaced By: ASTM A1021/A1021M-05 - Standard Specification for Martensitic Stainless Steel Forgings and Forging Stock for High-Temperature Service
• Effective Date: 01-Sep-2005

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
International (www.astm.org) for the latest information.
Designation: A 1021 – 02
Standard Specification for
Martensitic Stainless Steel Forgings and Forging Stock for
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High-Temperature Service
This standard is issued under the fixed designation A 1021; 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* Failure to comply with the general requirements of Specifica-
tionA 788constitutesnon-conformancewiththisspecification.
1.1 Thisspecificationcoversmartensiticchromiumstainless
In case of conflict between the requirements of this specifica-
steel forgings, forged bar, and forging stock for high tempera-
tion and Specification A 788, this specification shall prevail.
ture service. The mechanical properties are developed by
suitable heat treatment, as indicated for each alloy.
5. Manufacture
1.2 The values stated in inch-pound units are to be regarded
5.1 Melting Process—All melting processes of Specifica-
as standard.
tion A 788 are permitted unless the purchaser invokes Supple-
2. Referenced Documents mentary Requirement S1.
5.2 Forging Process—Either the closed impression die or
2.1 ASTM Standards:
the open die, including ring rolling, forging processes may be
A 275 Test Method for Magnetic Particle Examination of
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utilized unless the purchaser specifies a process.
Steel Forgings
5.3 Heat Treatment—Quenched and tempered classes shall
A 370 Test Methods and Definitions for MechanicalTesting
3
be heat-treated in accordance with Table 1.
of Steel Products
5.3.1 Number of Heat Treatments—Heat treatment as de-
A 788 Specification for Steel Forgings, General Require-
2
fined in Table 1 shall consist of austenitizing, quenching, and
ments
4
tempering. Retempering is permitted but purchaser approval is
E 112 Test Methods for Determining Average Grain Size
required for more than one complete reheat treatment.
E 292 Test Methods for Conducting Time-For-Rupture
4
5.4 Stress Relief—When heat treatment for mechanical
Notch Tension Tests of Materials
properties is followed by straightening, a stress-relieving heat
E 381 Method of Macroetch Testing Steel Bars, Billets,
4
treatment is required in accordance with Table 1.
Blooms, and Forgings
5.4.1 Quenching after Stress Relief—Liquid quenching of
E 562 Test Method for Determining Volume Fraction by
4
stress-relieved forgings is prohibited.
Systematic Manual Point Count
5.5 Finish—Forgings may be furnished in one of the fol-
3. Ordering Information
lowing hot-finished conditions:
5.5.1 Finish F—As forged without descaling.
3.1 In addition to the ordering information required by
5.5.2 Finish FD—Forged and descaled.
Specification A 788, the purchaser shall specify the grade
5.5.3 Finish RT—Rough turned or rough machined to
designation, heat treatment condition, class and finish, and
specified dimensions. Billets or blooms ordered as forging
include a sketch or written description of the forging with the
stock shall be furnished with a ground, machined, or descaled
inquiry and order.
surface unless otherwise specified in the ordering document.
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4. General Requirements
5.6 Camber—Camber shall not exceed ⁄4 in. (5 mm) in 5 ft
(150 cm).
4.1 Materials supplied to this specification shall conform to
the requirements of SpecificationA 788, including any supple-
6. Chemical Composition
mentary requirements that are indicated in the purchase order.
6.1 Thesteelshallconformtotherequirementsforchemical
composition prescribed in Table 2.
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This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee
A01.06 on Steel Forgings and Billets.
Current edition approved Sept. 10, 2002. Published June 2003.
2
Annual Book of ASTM Standards, Vol 01.05.
3
Annual Book of ASTM Standards, Vol 01.03.
4
Annual Book of ASTM Standards, Vol 03.01.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
International (www.astm.org) for the latest information.
A1021–02
TABLE 1 Heat Treatment, °F (°C)
Grade A Grade B Grade C Grade D Grade E
Class1&2 Class 1 Class 1 Class 2 Class1&2 Class 1 Class 2
Austenitizing 1725-1775 1600-1750 1825-1875 1725-1875 1875-1925 2075-2125 1725-1775
(940-970) (870-955) (995-1025) (940-1025) (1025-1050) (1135-1165) (940-970)
Quenching Air or liquid Air or liquid Air or liquid Air or liquid Air or liquid Air or liquid Air or liquid
Single Tempering 105
...