ASTM A193/A193M-24
(Specification)Standard Specification for Alloy-Steel and Stainless Steel Bolting for High Temperature or High Pressure Service and Other Special Purpose Applications
Standard Specification for Alloy-Steel and Stainless Steel Bolting for High Temperature or High Pressure Service and Other Special Purpose Applications
ABSTRACT
This specification covers alloy steel and stainless steel bolting material for pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications. Ferritic steels shall be properly heat treated as best suits the high temperature characteristics of each grade. Immediately after rolling or forging, the bolting material shall be allowed to cool to a temperature below the cooling transformation range. The chemical composition requirements for each alloy are presented in details. The steel shall not contain an unspecified element for ordered grade to the extent that the steel conforms to the requirements of another grade for which that element is a specified element. The tensile property and hardness property requirements are discussed, the tensile property requirement is highlighted by a full size fasteners, wedge tensile testing.
SCOPE
1.1 This specification2 covers alloy and stainless steel bolting materials and bolting components for pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications. See Specification A962/A962M for the definition of bolting. Bars and wire shall be hot-wrought and may be further processed by centerless grinding or by cold drawing. Austenitic stainless steel may be carbide solution treated or carbide solution treated and strain-hardened. When strain hardened austenitic stainless steel is ordered, the purchaser should take special care to ensure that Appendix X1 is thoroughly understood.
1.2 Several grades are covered, including ferritic steels and austenitic stainless steels designated B5, B8, and so forth. Selection will depend upon design, service conditions, mechanical properties, and high temperature characteristics.
1.3 The following referenced general requirements are indispensable for application of this specification: Specification A962/A962M.
Note 1: The committee formulating this specification has included several steel types that have been rather extensively used for the present purpose. Other compositions will be considered for inclusion by the committee from time to time as the need becomes apparent.
Note 2: For grades of alloy-steel bolting suitable for use at the lower range of high temperature applications, reference should be made to Specification A354.
Note 3: For grades of alloy-steel bolting suitable for use in low temperature applications, reference should be made to Specification A320/A320M.
1.4 Nuts for use with bolting are covered in Section 13.
1.5 Supplementary Requirements are provided for use at the option of the purchaser. The supplementary requirements shall apply only when specified in the purchase order or contract.
1.6 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.
1.7 The values stated in either SI units or inch-pound 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 non-conformance with the standard.
1.8 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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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: A193/A193M − 24
Standard Specification for
Alloy-Steel and Stainless Steel Bolting for High Temperature
or High Pressure Service and Other Special Purpose
1
Applications
This standard is issued under the fixed designation A193/A193M; 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* 1.5 Supplementary Requirements are provided for use at the
option of the purchaser. The supplementary requirements shall
2
1.1 This specification covers alloy and stainless steel bolt-
apply only when specified in the purchase order or contract.
ing materials and bolting components for pressure vessels,
1.6 This specification is expressed in both inch-pound units
valves, flanges, and fittings for high temperature or high
and in SI units; however, unless the purchase order or contract
pressure service, or other special purpose applications. See
specifies the applicable M specification designation (SI units),
Specification A962/A962M for the definition of bolting. Bars
the inch-pound units shall apply.
and wire shall be hot-wrought and may be further processed by
centerless grinding or by cold drawing. Austenitic stainless
1.7 The values stated in either SI units or inch-pound units
steel may be carbide solution treated or carbide solution treated
are to be regarded separately as standard. Within the text, the
and strain-hardened. When strain hardened austenitic stainless
SI units are shown in brackets. The values stated in each
steel is ordered, the purchaser should take special care to
system may not be exact equivalents; therefore, each system
ensure that Appendix X1 is thoroughly understood.
shall be used independently of the other. Combining values
from the two systems may result in non-conformance with the
1.2 Several grades are covered, including ferritic steels and
standard.
austenitic stainless steels designated B5, B8, and so forth.
Selection will depend upon design, service conditions, me- 1.8 This international standard was developed in accor-
chanical properties, and high temperature characteristics. dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
1.3 The following referenced general requirements are in-
Development of International Standards, Guides and Recom-
dispensable for application of this specification: Specification
mendations issued by the World Trade Organization Technical
A962/A962M.
Barriers to Trade (TBT) Committee.
NOTE 1—The committee formulating this specification has included
several steel types that have been rather extensively used for the present
2. Referenced Documents
purpose. Other compositions will be considered for inclusion by the
3
committee from time to time as the need becomes apparent.
2.1 ASTM Standards:
NOTE 2—For grades of alloy-steel bolting suitable for use at the lower
A153/A153M Specification for Zinc Coating (Hot-Dip) on
range of high temperature applications, reference should be made to
Iron and Steel Hardware
Specification A354.
A194/A194M Specification for Carbon Steel, Alloy Steel,
NOTE 3—For grades of alloy-steel bolting suitable for use in low
and Stainless Steel Nuts for Bolts for High Pressure or
temperature applications, reference should be made to Specification
A320/A320M. High Temperature Service, or Both
A320/A320M Specification for Alloy-Steel and Stainless
1.4 Nuts for use with bolting are covered in Section 13.
Steel Bolting for Low-Temperature Service
A354 Specification for Quenched and Tempered Alloy Steel
Bolts, Studs, and Other Externally Threaded Fasteners
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
A788/A788M Specification for Steel Forgings, General Re-
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
quirements
A01.22 on Steel Forgings and Wrought Fittings for Piping Applications and Bolting
Materials for Piping and Special Purpose Applications.
Current edition approved March 1, 2024. Published April 2024. Originally
3
approved in 1936. Last previous edition approved in 2023 as A193/A193M – 23. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
DOI: 10.1520/A0193_A0193M-24. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
2
For ASME Boiler and Pressure Vessel Code applications, see related Specifi- Standards volume informati
...
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: A193/A193M − 23 A193/A193M − 24
Standard Specification for
Alloy-Steel and Stainless Steel Bolting for High Temperature
or High Pressure Service and Other Special Purpose
1
Applications
This standard is issued under the fixed designation A193/A193M; 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*
2
1.1 This specification covers alloy and stainless steel bolting materials and bolting components for pressure vessels, valves,
flanges, and fittings for high temperature or high pressure service, or other special purpose applications. See Specification
A962/A962M for the definition of bolting. Bars and wire shall be hot-wrought and may be further processed by centerless grinding
or by cold drawing. Austenitic stainless steel may be carbide solution treated or carbide solution treated and strain-hardened. When
strain hardened austenitic stainless steel is ordered, the purchaser should take special care to ensure that Appendix X1 is thoroughly
understood.
1.2 Several grades are covered, including ferritic steels and austenitic stainless steels designated B5, B8, and so forth. Selection
will depend upon design, service conditions, mechanical properties, and high temperature characteristics.
1.3 The following referenced general requirements are indispensable for application of this specification: Specification
A962/A962M.
NOTE 1—The committee formulating this specification has included several steel types that have been rather extensively used for the present purpose.
Other compositions will be considered for inclusion by the committee from time to time as the need becomes apparent.
NOTE 2—For grades of alloy-steel bolting suitable for use at the lower range of high temperature applications, reference should be made to Specification
A354.
NOTE 3—For grades of alloy-steel bolting suitable for use in low temperature applications, reference should be made to Specification A320/A320M.
1.4 Nuts for use with bolting are covered in Section 13.
1.5 Supplementary Requirements are provided for use at the option of the purchaser. The supplementary requirements shall apply
only when specified in the purchase order or contract.
1.6 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.
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 A01.22
on Steel Forgings and Wrought Fittings for Piping Applications and Bolting Materials for Piping and Special Purpose Applications.
Current edition approved March 1, 2023March 1, 2024. Published March 2023April 2024. Originally approved in 1936. Last previous edition approved in 20222023 as
A193/A193M – 22a.A193/A193M – 23. DOI: 10.1520/A0193_A0193M-23.10.1520/A0193_A0193M-24.
2
For ASME Boiler and Pressure Vessel Code applications, see related Specification SA-193 in Section II of that Code.
*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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A193/A193M − 24
1.7 The values stated in either SI units or inch-pound 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 non-conformance with the standard.
1.8 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
3
2.1 ASTM Standards:
A153/A153M Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware
A194/A194M Specification for Carbon Steel, Alloy Steel, and Stainless Steel Nuts for Bolts for High Pr
...
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