ASTM A203/A203M-97(2007)
(Specification)Standard Specification for Pressure Vessel Plates, Alloy Steel, Nickel
Standard Specification for Pressure Vessel Plates, Alloy Steel, Nickel
SCOPE
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: GradeNominal Nickel
Content %Yield Strength, min, ksi [MPa]Tensile Strength, min, ksi [MPa] A2.2537 [255]65 [450] B2.2540 [275]70 [485] D3.5037 [255]65 [450] E3.5040 [275]70 [485] F3.50 2 in. [50 mm] and under 55 [380] 80 [550] cccc 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. However, current practice normally limits the maximum thickness of plates furnished under this specification as follows: Grade Maximum Thickness, in. [mm] A6 [150] B6 [150] D4 [100] E4 [100] F4 [100]
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.
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Designation: A 203/A 203M – 97 (Reapproved 2007)
Standard Specification for
Pressure Vessel Plates, Alloy Steel, Nickel
This standard is issued under the fixed designationA 203/A 203M; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 2. Referenced Documents
2 3
1.1 This specification covers nickel-alloy steel plates in- 2.1 ASTM Standards:
tended primarily for welded pressure vessels. A 20/A 20M Specification for General Requirements for
1.2 Plates under this specification are available with four Steel Plates for Pressure Vessels
strength levels and two nickel compositions as follows: A 435/A 435M Specification for Straight-Beam Ultrasonic
Examination of Steel Plates
Nominal Nickel Yield Strength, min, Tensile Strength,
Grade
Content % ksi [MPa] min, ksi [MPa]
A 577/A 577M Specification for Ultrasonic Angle-Beam
A 2.25 37 [255] 65 [450]
Examination of Steel Plates
B 2.25 40 [275] 70 [485]
A 578/A 578M Specification for Straight-Beam Ultrasonic
D 3.50 37 [255] 65 [450]
E 3.50 40 [275] 70 [485]
Examination of Rolled Steel Plates for Special Applica-
F 3.50
tions
2 in. [50 mm] and under 55 [380] 80 [550] cccc
Over 2 in. [50 mm] 50 [345] 75 [515]
3. General Requirements and Ordering Information
1.3 The maximum thickness of plates is limited only by the
3.1 Material supplied to this material specification shall
capacity of the composition to meet the specified mechanical
conform to Specification A 20/A 20M. These requirements
property requirements. However, current practice normally
outline the testing and retesting methods and procedures,
limits the maximum thickness of plates furnished under this
permissible variations in dimensions and mass, quality and
specification as follows:
repair of imperfections, marking, loading, etc.
Grade Maximum Thickness, in. [mm]
3.2 Specification A 20/A 20M also establishes the rules for
A 6 [150]
the basis of purchase that should be complied with when
B 6 [150]
D 4 [100]
purchasing material to this specification.
E 4 [100]
3.3 In addition to the basic requirements of this specifica-
F 4 [100]
tion, certain supplementary requirements are available when
1.4 The values stated in either inch-pound units or SI units
additional control, testing, or examination is required to meet
are to be regarded separately as standard. Within the text, the
end use requirements. These include:
SI units are shown in brackets. The values stated in each
3.3.1 Vacuum treatment,
system are not exact equivalents. Therefore, each system must
3.3.2 Additional or special tension testing,
be used independently of the other. Combining values from the
3.3.3 Impact testing, and
two systems may result in nonconformance with this specifi-
3.3.4 Nondestructive examination.
cation.
3.4 The purchaser is referred to the listed supplementary
requirements in this specification and to the detailed require-
ments in Specification A 20/A 20M.
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, 2007. Published March 2008. Originally
approved in 1937. Last previous edition approved in 2003 as A 203/ For referenced ASTM standards, visit the ASTM website, www.astm.org, or
A 203M – 97 (2003). contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
A 203/A 203M – 97 (2007)
3.5 If the requirements of this specification are in conflict Supplementary Requirement S17, Vacuum Carbon-Deoxidized
with the requirements of Specification A 20/A 20M, the re- Steel, in Specification A 20/A 20M.
quirements of this specification shall prevail.
7. Mechanical Properties
4. Materials and Manufacture
7.1 TensionTestRequirements—Thematerialasrepresented
4.1 Steelmaking Practice—The steel shall be killed and
bythetensiontestspecimensshallconformtotherequirements
shall conform to the fine grain size requirement of Specifica-
shown in Table 2.
tion A 20/A 20M.
7.1.1 For plates that have been heat treated in accordance
5. Heat Treatment
with5.1.1.1or5.1.2andhaveanominalthicknessof ⁄4 in.[20
5.1 All plates shall be thermally treated as follows: 1
mm] and under, the 1 ⁄2-in. (40-mm) wide rectangular speci-
5.1.1 All plates of Grades A, B, D, and E shall be normal-
men m
...
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:A 203/A 203M–97(Reapproved 2003) Designation: A 203/
A 203M – 97 (Reapproved 2007)
Standard Specification for
Pressure Vessel Plates, Alloy Steel, Nickel
This standard is issued under the fixed designationA 203/A 203M; 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 Department of Defense.
1. Scope
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
Yield
Tensile
Nickel
Strength,
Strength,
Content
min, ksi
min, ksi
Grade% [MPa] [MPa]
Nominal Nickel Yield Strength, min, Tensile Strength,
Content % ksi [MPa] min, ksi [MPa]
A A 2.25 37 [255] 65
B 2.25 40 [275] 70 [485] D
D 3.50 37 [255] 65 [450] E
E 3.50 40 [275] 70 [485] F
F 3.50
2 in. [50 mm] and under 55 [380] 80 [550]
2 in. [50 mm] and under 55 [380] 80 [550] cccc
Over 2 in. [50 mm] 50 [345] 75 [515]
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. However, current practice normally limits the maximum thickness of plates furnished under this
specification as follows:
Grade Maximum Thickness, in. [mm]
Maximum Thickness,
Grade in. [mm]
A 6 [150]
B 6 [150]
D 4 [100]
E 4 [100]
F 4 [100]
1.4 Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunits
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.
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of SubcommitteeA01.11
on Steel Plates for Boilers and Pressure Vessels.
Current edition approved Sept. 10, 2003. Published October 2003. Originally approved in 1937. Last previous edition approved in 1997 as A203/A203M – 97.
Current edition approved Nov. 1, 2007. Published March 2008. Originally approved in 1937. Last previous edition approved in 2003 as A 203/A 203M – 97 (2003).
For ASME Boiler and Pressure Vessel Code applications, see related Specification SA-203/SA-203M in Section II of that Code.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
A 203/A 203M – 97 (2007)
2. Referenced Documents
2.1 ASTM Standards:
A 20/A 20M Specification for General Requirements for Steel Plates for Pressure Vessels
A 435/A 435M Specification for Straight-Beam Ultrasonic Examination of Steel Plates
A 577/A 577M Specification for Ultrasonic Angle-Beam Examination of Steel Plates
A 578/A 578M Specification for Straight-Beam Ultrasonic Examination of Plain and Clad Rolled Steel Plates for Special
Applications
3. General Requirements and Ordering Information
3.1 Material supplied to this material specification shall conform to Specification A 20/A 20M/A20M. These requirements
outline the testing and retesting methods and procedures, permissible variations in dimensions and mass, quality and repair of
imperfections, marking, loading, etc.
3.2 Specification A 20/A 20M/A20M also establishes the rules for the basis of purchase that should be complied with when
purchasing material to this specification.
3.3 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. These include:
3.3.1 Vacuum treatment,
3.3.2 Additional or special tension testing,
3.3.3 Impact testing, and
3.3.4 Nondestructive examination.
3.4 The purchaser is referred to the listed supplementary requirements in this specification and to the detailed requirements in
Specification A 20/A 20M/A20M.
3.5 If the requirements of this specification are in conflict with the requirements of Specification A 20/A 20M/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 grain size requirement of Specification
A 20/A 20M.
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 normalized except as permitted by 5.1.1.1.
5.1.1.1 If approved by the purchaser for Grades A, B, D, and E, cooling rates faster than air cooling are permissible for
improvement of the toughness, provided the plates are subsequently tempered at not less than 1100°F [595°C] for not less than
⁄2 h.
5.1.2 All plates of Grade F shall be heat treated by heating into the austenitic range, quenching in water, and tempering at not
less than 1100°F [595°C] for not less than ⁄2 h.
6.Chemical Composition Chemical Composition
6. Chemical Composition
6.1 The steel shall conform to the chemical requirements shown in Table 1 unless otherwise modified in accordance with
Supplementary Requirement S17, Vacuum Carbon-Deoxidized Steel, in Specification A20A 20/A 20M/A20M. .
7. Mec
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