ASTM A1021/A1021M-20
(Specification)Standard Specification for Martensitic Stainless Steel Forgings and Forging Stock for High-Temperature Service
Standard Specification for Martensitic Stainless Steel Forgings and Forging Stock for High-Temperature Service
ABSTRACT
This specification covers martensitic chromium stainless steel forgings, forged bars, and forging stock for high-temperature service. The mechanical properties are developed by suitable heat treatment, as indicated for each alloy. Steel materials shall be manufactured by melting and forging processes, and heat treatments, that shall consist of austenizing, quenching, tempering, and stress relieving. Stainless steels may then be furnished in one of the following hot-finished conditions: as forged without descaling; forged and descaled; rough turned or rough machined. Specimens shall conform to required chemical compositions. Forgings shall undergo tension, impact, stress rapture, and hardness tests, and should conform to mechanical properties prescribed for individual grades and classes. These mechanical properties are: tensile strength, yield strength, elongation, reduction of area, impact strength, and Brinell and Rockwell hardness.
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 This specification is expressed in both inch-pound units and in SI units; however, unless the purchase order or contract specifies the applicable M specification designation (SI units), the inch-pound units shall apply. The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.
1.3 Supplementary requirements of an optional nature are provided for use at the option of the purchaser. The supplementary requirements shall apply only when specified individually by the purchaser in the purchase order or contract.
1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:A1021/A1021M −20
Standard Specification for
Martensitic Stainless Steel Forgings and Forging Stock for
1
High-Temperature Service
This standard is issued under the fixed designation A1021/A1021M; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 2. Referenced Documents
2
1.1 Thisspecificationcoversmartensiticchromiumstainless 2.1 ASTM Standards:
steel forgings, forged bar, and forging stock for high tempera- A275/A275MPracticeforMagneticParticleExaminationof
ture service. The mechanical properties are developed by Steel Forgings
suitable heat treatment, as indicated for each alloy. A370Test Methods and Definitions for Mechanical Testing
of Steel Products
1.2 This specification is expressed in both inch-pound units
A788/A788MSpecification for Steel Forgings, General Re-
and in SI units; however, unless the purchase order or contract
quirements
specifies the applicable M specification designation (SI units),
E112Test Methods for Determining Average Grain Size
the inch-pound units shall apply. The values stated in either
E292Test Methods for Conducting Time-for-Rupture Notch
inch-pound units or SI units are to be regarded separately as
Tension Tests of Materials
standard. Within the text, the SI units are shown in brackets.
E381Method of Macroetch Testing Steel Bars, Billets,
The values stated in each system are not necessarily exact
Blooms, and Forgings
equivalents; therefore, to ensure conformance with the
E562Test Method for Determining Volume Fraction by
standard, each system shall be used independently of the other,
Systematic Manual Point Count
and values from the two systems shall not be combined.
1.3 Supplementary requirements of an optional nature are 3. Ordering Information
provided for use at the option of the purchaser. The supple-
3.1 In addition to the ordering information required by
mentary requirements shall apply only when specified indi-
Specification A788/A788M, the purchaser shall specify the
vidually by the purchaser in the purchase order or contract.
grade designation, heat treatment condition, class and finish,
1.4 This standard does not purport to address all of the
and include a sketch or written description of the forging with
safety concerns, if any, associated with its use. It is the
the inquiry and order.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
4. General Requirements
mine the applicability of regulatory limitations prior to use.
4.1 Materials supplied to this specification shall conform to
1.5 This international standard was developed in accor-
the requirements of Specification A788/A788M, including any
dance with internationally recognized principles on standard-
supplementary requirements that are indicated in the purchase
ization established in the Decision on Principles for the
order. Failure to comply with the general requirements of
Development of International Standards, Guides and Recom-
Specification A788/A788M constitutes non-conformance with
mendations issued by the World Trade Organization Technical
this specification. In case of conflict between the requirements
Barriers to Trade (TBT) Committee.
of this specification and Specification A788/A788M, this
specification shall prevail.
1
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee
2
A01.06 on Steel Forgings and Billets. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved May 1, 2020. Published May 2020. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2001. Last previous edition approved in 2015 as A1021/A1021M- Standards volume information, refer to the standard’s Document Summary page on
05(2015). DOI: 10.1520/A1021_A1021M-20. the ASTM website.
*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
1
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A1021/A1021M−20
5. Manufacture 7.2 Test Specimens—Forgings may be lot tested. Test speci-
mens may be obtained from production forgings or from
5.1 MeltingProcess—AllmeltingprocessesofSpecification
separately forged test blanks prepared from the stock used to
A788/A788M are permitted unless
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: A1021/A1021M − 05 (Reapproved 2015) A1021/A1021M − 20
Standard Specification for
Martensitic Stainless Steel Forgings and Forging Stock for
1
High-Temperature Service
This standard is issued under the fixed designation A1021/A1021M; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope 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 This specification is expressed in both inch-pound units and in SI units; however, unless the purchase order or contract
specifies the applicable M specification designation (SI units), the inch-pound units shall apply. The values stated in either
inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The
values stated in each system mayare not benecessarily exact equivalents; therefore, to ensure conformance with the standard, each
system shall be used independently of the other. Combiningother, and values from the two systems may result in nonconformance
with the standard.shall not be combined.
1.3 Supplementary requirements of an optional nature are provided for use at the option of the purchaser. The supplementary
requirements shall apply only when specified individually by the purchaser in the purchase order or contract.
1.4 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
A275/A275M Practice for Magnetic Particle Examination of Steel Forgings
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A788/A788M Specification for Steel Forgings, General Requirements
E112 Test Methods for Determining Average Grain Size
E292 Test Methods for Conducting Time-for-Rupture Notch Tension Tests of Materials
E381 Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings
E562 Test Method for Determining Volume Fraction by Systematic Manual Point Count
3. Ordering Information
3.1 In addition to the ordering information required by Specification A788/A788M, the purchaser shall specify the grade
designation, heat treatment condition, class and finish, and include a sketch or written description of the forging with the inquiry
and order.
4. General Requirements
4.1 Materials supplied to this specification shall conform to the requirements of Specification A788/A788M, including any
supplementary requirements that are indicated in the purchase order. Failure to comply with the general requirements of
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.06
on Steel Forgings and Billets.
Current edition approved March 1, 2015May 1, 2020. Published March 2015May 2020. Originally approved in 2001. Last previous edition approved in 20102015 as
A1021/A1021MA1021/A1021M-05(2015). – 05 (2010). DOI: 10.1520/A1021_A1021M-05R15.DOI: 10.1520/A1021_A1021M-20.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’sstandard’s Document Summary page on the ASTM website.
*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
1
---------------------- Page: 1 ----------------------
A1021/A1021M − 20
Specification A788/A788M constitutes non-conformance with this specification. In case of conflict between the requirements of
this specifi
...
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