ASTM A738/A738M-19
(Specification)Standard Specification for Pressure Vessel Plates, Heat-Treated, Carbon-Manganese-Silicon Steel, for Moderate and Lower Temperature Service
Standard Specification for Pressure Vessel Plates, Heat-Treated, Carbon-Manganese-Silicon Steel, for Moderate and Lower Temperature Service
ABSTRACT
This specification covers heat-treated carbon-manganese-silicon steel plates intended for use in welded pressure vessels at moderate and lower temperature service. The materials are available in four strength levels and five grades, namely Grades A, B, C, D, and E. The maximum thickness of plates is limited only by the capacity of the chemical composition and heat treatment to meet the specified mechanical property requirements. The steel shall be killed and the plates shall be subjected to heat treatment, quenching, and tempering. The plates shall undergo a tension test to determine mechanical properties such as tensile strength, yield strength and elongation.
SCOPE
1.1 This specification2 covers heat-treated carbon-manganese-silicon steel plates intended for use in welded pressure vessels at moderate and lower temperature service.
1.2 Material under this specification is available in four strength levels, 75 ksi [515 MPa], 85 ksi [585 MPa], 80 ksi [550 MPa], and 90 ksi [620 MPa] minimum ultimate tensile strengths.
1.3 The maximum thickness of plates for Grades A, B, and C is limited only by the capacity of the chemical composition and heat treatment to meet the specified mechanical property requirements; however, current practice normally limits the maximum thickness of plates furnished under this specification to 6 in. [150 mm] for Grade A, 4 in. [100 mm] for Grade B, and 6 in. [150 mm] for Grade C. The maximum permitted nominal thickness is 1.5 in. [40 mm] for Grade D and 2 in. [50 mm] for Grade E.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. 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.
1.5 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.
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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:A738/A738M −19
Standard Specification for
Pressure Vessel Plates, Heat-Treated, Carbon-Manganese-
1
Silicon Steel, for Moderate and Lower Temperature Service
This standard is issued under the fixed designationA738/A738M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 2. Referenced Documents
3
2
2.1 ASTM Standards:
1.1 This specification covers heat-treated carbon-
A20/A20MSpecificationforGeneralRequirementsforSteel
manganese-silicon steel plates intended for use in welded
Plates for Pressure Vessels
pressure vessels at moderate and lower temperature service.
1.2 Material under this specification is available in four
3. General Requirements and Ordering Information
strength levels, 75 ksi [515 MPa], 85 ksi [585 MPa], 80 ksi
3.1 Material supplied to this material specification shall
[550 MPa], and 90 ksi [620 MPa] minimum ultimate tensile
conform to Specification A20/A20M. These requirements out-
strengths.
line the testing and retesting methods and procedures, permit-
1.3 The maximum thickness of plates for GradesA, B, and
ted variations in dimensions, and mass, quality and repair of
C is limited only by the capacity of the chemical composition
defects, marking, loading, and ordering information.
and heat treatment to meet the specified mechanical property
3.2 In addition to the basic requirements of this
requirements; however, current practice normally limits the
specification,certainsupplementaryrequirementsareavailable
maximumthicknessofplatesfurnishedunderthisspecification
when additional control, testing, or examination is required to
to6in.[150mm]forGradeA,4in.[100mm]forGradeB,and
meet end use requirements. The purchaser is referred to the
6 in. [150 mm] for Grade C. The maximum permitted nominal
listed supplementary requirements in this specification and to
thickness is 1.5 in. [40 mm] for Grade D and 2 in. [50 mm] for
the detailed requirements in Specification A20/A20M.
Grade E.
3.3 If the requirements of this specification are in conflict
1.4 The values stated in either SI units or inch-pound units
withtherequirementsofSpecificationA20/A20M,therequire-
are to be regarded separately as standard. The values stated in
ments of this specification shall prevail.
each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining 4. Manufacture
values from the two systems may result in non-conformance
4.1 Steelmaking Practice—The steel shall be killed and
with the standard.
shall conform to the fine austenitic grain size requirement of
1.5 This international standard was developed in accor-
Specification A20/A20M.
dance with internationally recognized principles on standard-
5. Heat Treatment
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom- 5.1 Grade A plates 2.5 in. [65 mm] and under in thickness
mendations issued by the World Trade Organization Technical shall be supplied in the normalized condition or in the
Barriers to Trade (TBT) Committee. quenched and tempered condition at the option of the manu-
facturer.
5.2 Grade A plates over 2.5 in. [65 mm] in thickness and
1
Grade B, Grade C, Grade D, and Grade E plates in all
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee
thicknesses shall be quenched-and-tempered.
A01.11 on Steel Plates for Boilers and Pressure Vessels.
Current edition approved May 1, 2019. Published May 2019. Originally
3
approved in 1976. Last previous edition approved in 2012 as A738/A738M–12a. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
DOI: 10.1520/A0738_A0738M-19. 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-738/SA-738M 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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A738/A738M−19
TABLE 1 Chemical Requirements
NOTE 1—Where “.” appears there is no requirement.
Composition, %
Element
Grade A Grade B Grade C Grade D Grade E
A B
Carbon, max 0.
...
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: A738/A738M − 12a A738/A738M − 19
Standard Specification for
Pressure Vessel Plates, Heat-Treated, Carbon-Manganese-
1
Silicon Steel, for Moderate and Lower Temperature Service
This standard is issued under the fixed designation A738/A738M; 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*
2
1.1 This specification covers heat-treated carbon-manganese-silicon steel plates intended for use in welded pressure vessels at
moderate and lower temperature service.
1.2 Material under this specification is available in four strength levels, 75 ksi [515 MPa], 85 ksi [585 MPa], 80 ksi [550 MPa],
and 90 ksi [620 MPa] minimum ultimate tensile strengths.
1.3 The maximum thickness of plates for Grades A, B, and C is limited only by the capacity of the chemical composition and
heat treatment to meet the specified mechanical property requirements; however, current practice normally limits the maximum
thickness of plates furnished under this specification to 6 in. [ 150 [150 mm] for Grade A, 4 in. [100 mm] for Grade B, and 6 in.
[150 mm] for Grade C. The maximum permitted nominal thickness is 1.5 in. [40 mm] for Grade D and 2 in. [50 mm] for Grade
E.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. 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.
1.5 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
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. Manufacture
4.1 Steelmaking Practice—The steel shall be killed and shall conform to the fine austenitic grain size requirement of
Specification A20/A20M.
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, 2012May 1, 2019. Published January 2013May 2019. Originally approved in 1976. Last previous edition approved in 2012 as
A738/A738M – 12.A738/A738M – 12a. DOI: 10.1520/A0738_A0738M-12A.10.1520/A0738_A0738M-19.
2
For ASME Boiler and Pressure Vessel Code applications see related Specification SA-738/SA-738M 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 ----------------------
A738/A738M − 19
5. Heat Treatment
5.1 Grade A plates 2.5 in. [65 mm] and under in thickness shall be supplied in the normalized condition or in the quenched and
tempered condition at the option of the manufacturer.
5.2 Grade A plates over 2.5 in. [65 mm] in thickness and Grade B, Grade
...
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