ASTM A1021/A1021M-05
(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 may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.
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 and health practices and determine the applicability of regulatory limitations prior to use.
General Information
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Standards Content (Sample)
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Designation: A1021/A1021M – 05
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* A788/A788M Specification for Steel Forgings, General Re-
quirements
1.1 Thisspecificationcoversmartensiticchromiumstainless
E112 Test Methods for Determining Average Grain Size
steel forgings, forged bar, and forging stock for high tempera-
E292 Test Methods for Conducting Time-for-Rupture
ture service. The mechanical properties are developed by
Notch Tension Tests of Materials
suitable heat treatment, as indicated for each alloy.
E381 Method of Macroetch Testing Steel Bars, Billets,
1.2 This specification is expressed in both inch-pound units
Blooms, and Forgings
and in SI units; however, unless the purchase order or contract
E562 Test Method for Determining Volume Fraction by
specifies the applicable M specification designation (SI units),
Systematic Manual Point Count
the inch-pound units shall apply. The values stated in either
inch-pound units or SI units are to be regarded separately as
3. Ordering Information
standard. Within the text, the SI units are shown in brackets.
3.1 In addition to the ordering information required by
The values stated in each system may not be exact equivalents;
Specification A788/A788M, the purchaser shall specify the
therefore,eachsystemshallbeusedindependentlyoftheother.
grade designation, heat treatment condition, class and finish,
Combining values from the two systems may result in noncon-
and include a sketch or written description of the forging with
formance with the standard.
the inquiry and order.
1.3 Supplementary requirements of an optional nature are
provided for use at the option of the purchaser. The supple-
4. General Requirements
mentary requirements shall apply only when specified indi-
4.1 Materials supplied to this specification shall conform to
vidually by the purchaser in the purchase order or contract.
the requirements of SpecificationA788/A788M, including any
1.4 This standard does not purport to address all of the
supplementary requirements that are indicated in the purchase
safety concerns, if any, associated with its use. It is the
order. Failure to comply with the general requirements of
responsibility of the user of this standard to establish appro-
Specification A788/A788M constitutes non-conformance with
priate safety and health practices and determine the applica-
this specification. In case of conflict between the requirements
bility of regulatory limitations prior to use.
of this specification and Specification A788/A788M, this
2. Referenced Documents specification shall prevail.
2
2.1 ASTM Standards:
5. Manufacture
A275/A275M Practice for Magnetic Particle Examination
5.1 Melting Process—All melting processes of Specifica-
of Steel Forgings
tion A788/A788M are permitted unless the purchaser invokes
A370 Test Methods and Definitions for Mechanical Testing
Supplementary Requirement S1.
of Steel Products
5.2 Forging Process—Either the closed impression die or
the open die, including ring rolling, forging processes may be
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
utilized unless the purchaser specifies a process.
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee
5.3 Heat Treatment—Quenched and tempered classes shall
A01.06 on Steel Forgings and Billets.
be heat-treated in accordance with Table 1.
Current edition approved Sept. 1, 2005. Published September 2005. Originally
approved in 2001. Last previous edition approved in 2002 as A1021 – 02. DOI: 5.3.1 Number of Heat Treatments—Heat treatment as de-
10.1520/A1021_A1021M-05.
fined in Table 1 shall consist of austenitizing, quenching, and
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
tempering. Retempering is permitted but purchaser approval is
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
required for more than one complete reheat treatment.
Standards volume information, refer to the standard’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.
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A1021/A1021M – 05
TABLE 1 Heat Treatment, °F [°C]
Grade A Grade B Grade C Grade D Grade E Grade F
Class1&2 Class 1 Class 1 Class 2 Class1&2 Clas
...
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