ASTM A203/A203M-23
(Specification)Standard Specification for Pressure Vessel Plates, Alloy Steel, Nickel
Standard Specification for Pressure Vessel Plates, Alloy Steel, Nickel
ABSTRACT
This specification covers nickel-alloy steel plates intended primarily for welded pressure vessels. As a steel making practice, the steel shall be killed and shall conform to fine grain size requirements. The heat treatment requirements for all plates are presented, and all plates under Grades A, B, D, and E shall be normalized as required. The steel shall conform to the required chemical compositions. Two mechanical test requirements are presented that includes, tension test requirements and impact test requirements.
SCOPE
1.1 This specification2 covers nickel-alloy steel plates intended primarily for welded pressure vessels.
1.2 Plates under this specification are available with four strength levels and two nickel compositions as follows:
Grade
Nominal Nickel
Content %
Yield Strength, min, ksi [MPa]
Tensile Strength, min, ksi [MPa]
A
2.25
37 [255]
65 [450]
B
2.25
40 [275]
70 [485]
D
3.50
37 [255]
65 [450]
E
3.50
40 [275]
70 [485]
F
3.50
2 in. [50 mm] and under
55 [380]
80 [550]
Over 2 in. [50 mm]
50 [345]
75 [515]
1.3 The maximum thickness of plates is limited only by the capacity of the composition to meet the specified mechanical property requirements.
1.4 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 exact equivalents. Therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with this specification.
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.
General Information
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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: A203/A203M − 23
Standard Specification for
1
Pressure Vessel Plates, Alloy Steel, Nickel
This standard is issued under the fixed designation A203/A203M; 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. Referenced Documents
3
2
2.1 ASTM Standards:
1.1 This specification covers nickel-alloy steel plates in-
A20/A20M Specification for General Requirements for Steel
tended primarily for welded pressure vessels.
Plates for Pressure Vessels
1.2 Plates under this specification are available with four
A435/A435M Specification for Straight-Beam Ultrasonic
strength levels and two nickel compositions as follows:
Examination of Steel Plates
Nominal Nickel Yield Strength, min, Tensile Strength, A577/A577M Specification for Ultrasonic Angle-Beam Ex-
Grade
Content % ksi [MPa] min, ksi [MPa]
amination of Steel Plates
A 2.25 37 [255] 65 [450]
A578/A578M Specification for Straight-Beam Ultrasonic
B 2.25 40 [275] 70 [485]
D 3.50 37 [255] 65 [450] Examination of Rolled Steel Plates for Special Applica-
E 3.50 40 [275] 70 [485]
tions
F 3.50
2 in. [50 mm] and under 55 [380] 80 [550]
3. General Requirements and Ordering Information
Over 2 in. [50 mm] 50 [345] 75 [515]
3.1 Material supplied to this material specification shall
1.3 The maximum thickness of plates is limited only by the
conform to Specification A20/A20M. These requirements out-
capacity of the composition to meet the specified mechanical
line the testing and retesting methods and procedures, permit-
property requirements.
ted variations in dimensions, and mass, quality and repair of
defects, marking, loading, and ordering information.
1.4 The values stated in either inch-pound units or SI units
are to be regarded separately as standard. Within the text, the
3.2 In addition to the basic requirements of this
SI units are shown in brackets. The values stated in each
specification, certain supplementary requirements are available
system are not exact equivalents. Therefore, each system must when additional control, testing, or examination is required to
be used independently of the other. Combining values from the meet end use requirements. The purchaser is referred to the
listed supplementary requirements in this specification and to
two systems may result in nonconformance with this specifi-
cation. the detailed requirements in Specification A20/A20M.
3.3 If the requirements of this specification are in conflict
1.5 This international standard was developed in accor-
with the requirements of Specification A20/A20M, the require-
dance with internationally recognized principles on standard-
ments of this specification shall prevail.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
4. Materials and Manufacture
mendations issued by the World Trade Organization Technical
4.1 Steelmaking Practice—The steel shall be killed and
Barriers to Trade (TBT) Committee.
shall conform to the fine austenitic grain size requirement of
Specification A20/A20M.
5. Heat Treatment
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
5.1 All plates shall be thermally treated as follows:
A01.11 on Steel Plates for Boilers and Pressure Vessels.
Current edition approved July 1, 2023. Published July 2023. Originally approved
3
in 1937. Last previous edition approved in 2017 as A203/A203M – 17. DOI: For referenced ASTM standards, visit the ASTM website, www.astm.org, or
10.1520/A0203_A0203M-23. 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 information, refer to the standard’s Document Summary page on
cation SA-203/SA-203M in Section II of that Code. 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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A203/A203M − 23
TABLE 1 Chemical Requirements
Composition, %
Elements
Grade A Grade B Grade D Grades E and F
A
Carbon, max:
Up to 2 in. [50 mm] in thickness 0.17 0.21 0.17 0.20
Over 2 in. to 4 in. [100 mm] incl. in thickness 0.20 0.24 0.20 0.23
Over 4
...
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: A203/A203M − 17 A203/A203M − 23
Standard Specification for
1
Pressure Vessel Plates, Alloy Steel, Nickel
This standard is issued under the fixed designation A203/A203M; 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 nickel-alloy steel plates intended primarily for welded pressure vessels.
1.2 Plates under this specification are available with four strength levels and two nickel compositions as follows:
Nominal Nickel Yield Strength, min, Tensile Strength,
Grade
Content % ksi [MPa] min, ksi [MPa]
A 2.25 37 [255] 65 [450]
B 2.25 40 [275] 70 [485]
D 3.50 37 [255] 65 [450]
E 3.50 40 [275] 70 [485]
F 3.50
2 in. [50 mm] and under 55 [380] 80 [550]
Over 2 in. [50 mm] 50 [345] 75 [515]
1.3 The maximum thickness of plates is limited only by the capacity of the composition to meet the specified mechanical property
requirements.
1.4 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 exact equivalents. Therefore, each system must be used
independently of the other. Combining values from the two systems may result in nonconformance with this specification.
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
3
2.1 ASTM Standards:
A20/A20M Specification for General Requirements for Steel Plates for Pressure Vessels
A435/A435M Specification for Straight-Beam Ultrasonic Examination of Steel Plates
A577/A577M Specification for Ultrasonic Angle-Beam Examination of Steel Plates
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 A01.11
on Steel Plates for Boilers and Pressure Vessels.
Current edition approved Nov. 1, 2017July 1, 2023. Published November 2017July 2023. Originally approved in 1937. Last previous edition approved in 20122017 as
A203/A203M – 12.A203/A203M – 17. DOI: 10.1520/A0203_A0203M-17.10.1520/A0203_A0203M-23.
2
For ASME Boiler and Pressure Vessel Code applications, see related Specification SA-203/SA-203M in Section II of that Code.
3
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’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 ----------------------
A203/A203M − 23
A578/A578M Specification for Straight-Beam Ultrasonic Examination of Rolled Steel Plates for Special Applications
3. General Requirements and Ordering Information
3.1 Material supplied to this material specification shall conform to Specification A20/A20M. These requirements outline the
testing and retesting methods and procedures, permitted variations in dimensions, and mass, quality and repair of defects, marking,
loading, and ordering information.
3.2 In addition to the basic requirements of this specification, certain supplementary requirements are available when additional
control, testing, or examination is required to meet end use requirements. The purchaser is referred to the listed supplementary
requirements in this specification and to the detailed requirements in Specification A20/A20M.
3.3 If the requirements of this specification are in conflict with the requirements of Specification A20/A20M, the requirements of
this specification shall prevail.
4. Materials and Manufacture
4.1 Steelmaking Practice—The steel shall be killed and shall conform to the fine austenitic grain size requirement of Specification
A20/A20M.
5. Heat Treatment
5.1 All plates shall be thermally treated as follows:
5.1.1 All plates of Grades A, B, D, and E shall be
...
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