ASTM A473-23a

Standard Specification for Stainless Steel Forgings

ABSTRACT
This specification covers austenitic, austenitic-ferritic, ferritic, and martensitic stainless steel forgings for general use, and for low- or high-temperature service. The different solution heat treatment and annealing treatment received by the steel material are presented in details. The steel shall conform to the specified chemical composition and room temperature mechanical requirements. The forgings shall be produced with prolongations for testing, unless otherwise specified. The number of and procedure for tension test for forgings depending on their weight are presented. The tension test specimens shall be taken from the test prolongations or from the forgings.
SCOPE
1.1 This specification covers austenitic, austenitic-ferritic, ferritic, and martensitic stainless steel forgings for general use, and for low- or high-temperature service.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3 Supplementary requirements from Specification A788/A788M may be specified when additional testing, inspection, or processing is required.  
1.4 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.

General Information

• Status: Published
• Publication Date: 31-Aug-2023
• 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

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: A473 − 23a
Standard Specification for
1
Stainless Steel Forgings
This standard is issued under the fixed designation A473; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
3
1. Scope* 2.2 SAE Standard:
SAE J1086 Numbering Metals and Alloys
1.1 This specification covers austenitic, austenitic-ferritic,
ferritic, and martensitic stainless steel forgings for general use,
3. Ordering Information
and for low- or high-temperature service.
3.1 It is the responsibility of the purchaser to specify all
1.2 The values stated in inch-pound units are to be regarded
requirements that are necessary for material ordered under this
as standard. The values given in parentheses are mathematical
specification. Such requirements may include, but are not
conversions to SI units that are provided for information only
limited to, the following:
and are not considered standard.
3.1.1 Quantity (weight or number of pieces);
3.1.2 Dimensions, including prints or sketches;
1.3 Supplementary requirements from Specification A788/
A788M may be specified when additional testing, inspection, 3.1.3 Name of material (stainless steel forgings);
3.1.4 Type or UNS designation (Table 1);
or processing is required.
3.1.5 Condition (Table 2);
1.4 This international standard was developed in accor-
3.1.6 ASTM designation and date of issue;
dance with internationally recognized principles on standard-
3.1.7 Test for magnetic permeability, if specified by cus-
ization established in the Decision on Principles for the
tomer purchase order when ordering Types 207 and 205; and
Development of International Standards, Guides and Recom-
3.1.8 Special requirements.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
3.2 If possible, the intended end use of the item should be
given on the purchase order, especially when the item is
2. Referenced Documents
ordered for a specific end use or uses.
2
2.1 ASTM Standards:
NOTE 1—A typical ordering description is as follows: 5 stainless steel
A370 Test Methods and Definitions for Mechanical Testing
forgings, Type 410, Designation A, ASTM Specification A473 dated
of Steel Products
______. End use: pump blocks for oil well equipment.
A751 Test Methods and Practices for Chemical Analysis of
4. General Requirements
Steel Products
A788/A788M Specification for Steel Forgings, General Re- 4.1 Material supplied to this specification shall conform to
quirements the requirements of Specification A788/A788M, which out-
A1058 Test Methods for Mechanical Testing of Steel lines additional ordering information, manufacturing
Products—Metric
requirements, testing and retesting methods and procedures,
E8/E8M Test Methods for Tension Testing of Metallic Ma- marking, certification, product analysis variations, and addi-
terials
tional supplementary requirements.
E527 Practice for Numbering Metals and Alloys in the
4.2 If the requirements of this specification are in conflict
Unified Numbering System (UNS)
with the requirements of Specification A788/A788M, the
requirements of this specification shall prevail.
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
5. Manufacture
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
A01.06 on Steel Forgings and Billets.
5.1 Material for forgings shall consist of ingots or blooms,
Current edition approved Sept. 1, 2023. Published September 2023. Originally
billets, slabs, or bars, either forged or rolled from an ingot, and
approved in 1962. Last previous edition approved in 2023 as A473 – 23. DOI:
10.1520/A0473-23A.
cut to the required length by a suitable process.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from SAE International (SAE), 400 Commonwealth Dr., Warrendale,
the ASTM website. PA 15096, http://www.sae.org.
*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 ----------------------
A473 − 23a
A
TABLE 1 Chemical Requirements
UNS Manga- Phos- Other
Type Carbon, Sulfur, Silicon, Chromium,
...

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: A473 − 23 A473 − 23a
Standard Specification for
1
Stainless Steel Forgings
This standard is issued under the fixed designation A473; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
1.1 This specification covers austenitic, austenitic-ferritic, ferritic, and martensitic stainless steel forgings for general use, and for
low- or high-temperature service.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.3 Supplementary requirements from Specification A788/A788M may be specified when additional testing, inspection, or
processing is required.
1.4 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:
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A751 Test Methods and Practices for Chemical Analysis of Steel Products
A788/A788M Specification for Steel Forgings, General Requirements
A1058 Test Methods for Mechanical Testing of Steel Products—Metric
E8/E8M Test Methods for Tension Testing of Metallic Materials
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
3
2.2 SAE Standard:
SAE J1086 Numbering Metals and Alloys
3. Ordering Information
3.1 It is the responsibility of the purchaser to specify all requirements that are necessary for material ordered under this
specification. Such requirements may include, but are not limited to, the following:
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, 2023Sept. 1, 2023. Published April 2023September 2023. Originally approved in 1962. Last previous edition approved in 20212023
as A473A473 – 23.-21. DOI: 10.1520/A0473-23.10.1520/A0473-23A.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from SAE International (SAE), 400 Commonwealth Dr., Warrendale, PA 15096, http://www.sae.org.
*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 ----------------------
A473 − 23a
3.1.1 Quantity (weight or number of pieces);
3.1.2 Dimensions, including prints or sketches;
3.1.3 Name of material (stainless steel forgings);
3.1.4 Type or UNS designation (Table 1);
3.1.5 Condition (Table 2); and
3.1.6 ASTM designation and date of issue;
3.1.7 Test for magnetic permeability, if specified by customer purchase order when ordering Types 207 and 205; and
3.1.8 Special requirements.
3.2 If possible, the intended end use of the item should be given on the purchase order, especially when the item is ordered for
a specific end use or uses.
NOTE 1—A typical ordering description is as follows: 5 stainless steel forgings, Type 410, Designation A, ASTM Specification A473 dated ______. End
use: pump blocks for oil well equipment.
4. General Requirements
4.1 Material supplied to this specification shall conform to the requirements of Specification A788/A788M, which outlines
additional ordering information, manufacturing requirements, testing and retesting methods and procedures, marking, certification,
product analysis variations, and additional supplementary requirements.
4.2 If the requirements of this specification are in conflict with the requirements of Specification A788/A788M, the requirements
of this specification shall prevail.
5. Manufacture
5.1 Material for forgings shall consist of ingots or blooms, billets, slabs, or bars, either forged or
...