ASTM A841/A841M-13
(Specification)Standard Specification for Steel Plates for Pressure Vessels, Produced by Thermo-Mechanical Control Process (TMCP)
Standard Specification for Steel Plates for Pressure Vessels, Produced by Thermo-Mechanical Control Process (TMCP)
ABSTRACT
This specification covers steel plates produced by the thermo-mechanical control process (TMCP). The plates are intended primarily for use in welded pressure vessels. The steel shall be killed and shall conform to specified fine austenitic grain size and chemical composition requirements. If the plates are to be subjected to warm forming or post-weld heat treatment, the test coupons shall be subjected to heat treatment to simulate such fabrication operations. The tension test and notch toughness test requirements are presented in details. Two tension tests shall be made from each plate-as-rolled. One test coupon shall be taken from a corner of the plate on each end.
SCOPE
1.1 This specification2 covers steel plates produced by the thermo-mechanical control process (TMCP). The plates are intended primarily for use in welded pressure vessels. A description of the TMCP method is given in Appendix X1.
1.2 Due to the inherent characteristics of the TMCP method, the plates cannot be formed at elevated temperatures without sustaining significant losses in strength and toughness. Except for Grade G, the plates may be formed and post-weld heat-treated at temperatures not exceeding 1200°F [650°C], providing the requirements of 6.1 are met. Grade G plates may be formed at temperatures not exceeding 985°F [530°C] provided the requirements of 6.1 are met.
1.3 The maximum permitted nominal thickness of plates furnished to this specification is 4 in. [100 mm] for Grades A, B, and C; 1.5 in. [40 mm] for Grades D,3 E, and F; and 2 in. [50 mm] for Grade G.
1.4 Grade G is susceptible to magnetization. Use of magnets in handling after heat treatment should be avoided if residual magnetism would be detrimental to subsequent fabrication or service.
1.5 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:A841/A841M −13
Standard Specification for
Steel Plates for Pressure Vessels, Produced by Thermo-
1
Mechanical Control Process (TMCP)
This standard is issued under the fixed designationA841/A841M; 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. Referenced Documents
2 4
1.1 This specification covers steel plates produced by the 2.1 ASTM Standards:
thermo-mechanical control process (TMCP). The plates are A20/A20M SpecificationforGeneralRequirementsforSteel
intended primarily for use in welded pressure vessels. A Plates for Pressure Vessels
description of the TMCP method is given in Appendix X1. A435/A435M Specification for Straight-Beam Ultrasonic
Examination of Steel Plates
1.2 DuetotheinherentcharacteristicsoftheTMCPmethod,
A577/A577M Specification for Ultrasonic Angle-Beam Ex-
the plates cannot be formed at elevated temperatures without
amination of Steel Plates
sustaining significant losses in strength and toughness. Except
A578/A578M Specification for Straight-Beam Ultrasonic
for Grade G, the plates may be formed and post-weld heat-
Examination of Rolled Steel Plates for Special Applica-
treated at temperatures not exceeding 1200°F [650°C], provid-
tions
ing the requirements of 6.1 are met. Grade G plates may be
formed at temperatures not exceeding 985°F [530°C] provided
3. General Requirements and Ordering Information
the requirements of 6.1 are met.
3.1 Plates supplied to this product specification shall con-
1.3 The maximum permitted nominal thickness of plates
form to Specification A20/A20M, which outlines the testing
furnished to this specification is 4 in. [100 mm] for Grades A,
and retesting methods and procedures, permissible variations
3
B, and C; 1.5 in. [40 mm] for Grades D, E, and F; and 2 in.
in dimensions, quality and repair of defects, marking, loading,
[50 mm] for Grade G.
etc.
1.4 GradeGissusceptibletomagnetization.Useofmagnets
3.2 Specification A20/A20M also establishes the rules for
in handling after heat treatment should be avoided if residual
ordering information that should be complied with when
magnetism would be detrimental to subsequent fabrication or
purchasing plates to this specification.
service.
3.2.1 If the plates are to be subjected to warm forming or
post-weld heat treatment, the order must indicate the tempera-
1.5 The values stated in either inch-pound units or SI units
are to be regarded separately as standard. Within the text, the tures and times-at-temperature that will be utilized in such
operations.(See6.1andSpecificationA20/A20M,Supplemen-
SI units are shown in brackets. The values stated in each
system are not exact equivalents. Therefore, each system must tary Requirement S3.)
be used independently of the other. Combining values from the
3.3 In addition to the basic requirements of this
two systems may result in nonconformance with this specifi-
specification, certain supplementary requirements are available
cation.
when additional control, testing, or examination is required to
meet end use requirements. These include:
3.3.1 Vacuum treatment,
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
3.3.2 Additional or special tension testing,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
3.3.3 Additional or special impact testing, and
A01.11 on Steel Plates for Boilers and Pressure Vessels.
3.3.4 Nondestructive examination.
Current edition approved Oct. 1, 2013. Published November 2013. Originally
approved in 1985. Last previous edition approved in 2007 as A841/A841M – 03a
3.4 The purchaser is referred to the listed supplementary
(2007). DOI: 10.1520/A0841_A0841M-13.
2
requirements in this specification and to the detailed require-
For ASME Boiler and Pressure Vessel Code applications, see related Specifi-
cation SA-841/SA-841M in Section II of that Code.
ments in Specification A20/A20M.
3
ExxonMobil Upstream Research Company has patents pending concerning the
use of chemistry ranges in ASTM A841 Grade D, in combination with specific
4
TMCP routes and/or specific microstructural features. Interested parties are invited For referenced ASTM standards, visit the ASTM website, www.astm.org, or
to submit information regarding identification of alternatives to these patented items contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
to ASTM International Headquarters. Your comments will receive careful consid- Standards volume information, refer to the standard’s Document Summary page on
1
eration at a meeting of the responsible technical committee, which you may attend. the
...
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: A841/A841M − 03a (Reapproved 2007) A841/A841M − 13
Standard Specification for
Steel Plates for Pressure Vessels, Produced by Thermo-
1
Mechanical Control Process (TMCP)
This standard is issued under the fixed designation A841/A841M; 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 Scope*
2
1.1 This specification covers steel plates produced by the thermo-mechanical control process (TMCP). The plates are intended
primarily for use in welded pressure vessels. A description of the TMCP method is given in Appendix X1.
1.2 The TMCP method consists of rolling-reduction and cooling rate controls that result in mechanical properties in the finished
plate that are equivalent to those attained using conventional rolling and heat treating processes, which entail reheating after
rolling. A description of the TMCP method is given in Appendix X1.
1.2 Due to the inherent characteristics of the TMCP method, the plates cannot be formed at elevated temperatures without
sustaining significant losses in strength and toughness. The Except for Grade G, the plates may be formed and post-weld
heat-treated at temperatures not exceeding 1200°F [650°C], providing the requirements of 6.1 are met. Grade G plates may be
formed at temperatures not exceeding 985°F [530°C] provided the requirements of 6.1 are met.
1.3 The maximum permitted nominal thickness of plates furnished to this specification is 4 in. [100 mm] for Grades A, B, and
3
C; and 1.5 in. [40 mm] for Grades D, E, and F.F; and 2 in. [50 mm] for Grade G.
1.4 Grade G is susceptible to magnetization. Use of magnets in handling after heat treatment should be avoided if residual
magnetism would be detrimental to subsequent fabrication or service.
1.5 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.
2. Referenced Documents
4
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
A578/A578M Specification for Straight-Beam Ultrasonic Examination of Rolled Steel Plates for Special Applications
3. General Requirements and Ordering Information
3.1 Plates supplied to this product specification shall conform to Specification A20/A20M, which outlines the testing and
retesting methods and procedures, permissible variations in dimensions, quality and repair of defects, marking, loading, etc.
3.2 Specification A20/A20M also establishes the rules for ordering information that should be complied with when purchasing
plates to this specification.
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, 2007Oct. 1, 2013. Published March 2008November 2013. Originally approved in 1985. Last previous edition approved in 20032007 as
A841/A841M – 03a.A841/A841M – 03a (2007). DOI: 10.1520/A0841_A0841M-03AR07.10.1520/A0841_A0841M-13.
2
For ASME Boiler and Pressure Vessel Code applications, see related Specification SA-841/SA-841M in Section II of that Code.
3
ExxonMobil Upstream Research Company has patents pending concerning the use of chemistry ranges in ASTM A841 Grade D, in combination with specific TMCP
routes and/or specific microstructural features. Interested parties are invited to submit information regarding identification of alternatives to these patented items to ASTM
1
International Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
4
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 app
...
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