ASTM A841/A841M-03a(2007)
(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 specification covers steel plates produced by the thermo-mechanical control process (TMCP). The plates are intended primarily for use in welded pressure vessels.
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.
1.3 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 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.
1.4 The maximum permitted nominal thickness of plates furnished to this specification is 4 in. [100 mm] for Grades A, B, and C; and 1.5 in. [40 mm] for Grades D, E, and F.
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 −03a(Reapproved 2007)
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
4
2
2.1 ASTM Standards:
1.1 This specification covers steel plates produced by the
A20/A20M SpecificationforGeneralRequirementsforSteel
thermo-mechanical control process (TMCP). The plates are
Plates for Pressure Vessels
intended primarily for use in welded pressure vessels.
A435/A435M Specification for Straight-Beam Ultrasonic
1.2 The TMCP method consists of rolling-reduction and
Examination of Steel Plates
cooling rate controls that result in mechanical properties in the
A577/A577M Specification for Ultrasonic Angle-Beam Ex-
finished plate that are equivalent to those attained using
amination of Steel Plates
conventional rolling and heat treating processes, which entail
A578/A578M Specification for Straight-Beam Ultrasonic
reheating after rolling. A description of the TMCP method is Examination of Rolled Steel Plates for Special Applica-
given in Appendix X1. tions
1.3 DuetotheinherentcharacteristicsoftheTMCPmethod,
3. General Requirements and Ordering Information
the plates cannot be formed at elevated temperatures without
3.1 Plates supplied to this product specification shall con-
sustaining significant losses in strength and toughness. The
form to Specification A20/A20M, which outlines the testing
plates may be formed and post-weld heat-treated at tempera-
and retesting methods and procedures, permissible variations
tures not exceeding 1200°F [650°C], providing the require-
in dimensions, quality and repair of defects, marking, loading,
ments of 6.1 are met.
etc.
1.4 The maximum permitted nominal thickness of plates 3.2 Specification A20/A20M also establishes the rules for
furnished to this specification is 4 in. [100 mm] for Grades A,
ordering information that should be complied with when
3
B, and C; and 1.5 in. [40 mm] for Grades D, E, and F. purchasing plates to this specification.
3.2.1 If the plates are to be subjected to warm forming or
1.5 The values stated in either inch-pound units or SI units
post-weld heat treatment, the order must indicate the tempera-
are to be regarded separately as standard. Within the text, the
tures and times-at-temperature that will be utilized in such
SI units are shown in brackets. The values stated in each
operations.(See6.1andSpecificationA20/A20M,Supplemen-
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 Nov. 1, 2007. Published March 2008. Originally
approved in 1985. Last previous edition approved in 2003 as A841/A841M – 03a.
3.4 The purchaser is referred to the listed supplementary
DOI: 10.1520/A0841_A0841M-03AR07.
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 ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive,
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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 841/A 841M–03a Designation: A841/A841M – 03a (Reapproved 2007)
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
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.
1.2 TheTMCPmethod 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.
1.3 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 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.
1.4 The maximum permitted nominal thickness of plates furnished to this specification is 4 in. [100 mm] for GradesA, B, and
3
C; and 1.5 in. [40 mm] for Grades D, ,E,andF.
1.5 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.
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 Plain and CladRolled Steel Plates for Special
Applications
3. General Requirements and Ordering Information
3.1 Plates supplied to this product specification shall conform to Specification A 20/A 20M, A20/A20M, which outlines the
testingandretestingmethodsandprocedures,permissiblevariationsindimensions,qualityandrepairofdefects,marking,loading,
etc.
3.2 SpecificationA20/A20MA20/A20M also establishes the rules for ordering information that should be complied with when
purchasing plates to this specification.
3.2.1 If the plates are to be subjected to warm forming or post-weld heat treatment, the order must indicate the temperatures
and times-at-temperature that will be utilized in such operations. (See 6.1 and Specification A 20/A 20M, A20/A20M,
Supplementary Requirement S3.)
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:
1
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 May 10, 2003. Published June 2003. Originally approved in 1985. Last previous edition approved in 2001 as A 841/A 841M–01.
Current edition approved Nov. 1, 2007. Published March 2008. Originally approved in 1985. Last previous edition approved in 2003 as A841/A841M – 03a. DOI:
10.1520/A0841_A0841M-03AR07.
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
International Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
4
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. ForAnnualBookofASTMStandard
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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–03 Designation: A 841/A 841M – 03a (Reapproved 2007)
Standard Specification for
Steel Plates for Pressure Vessels, Produced by Thermo-
1
Mechanical Control Process (TMCP)
This standard is issued under the fixed designationA 841/A 841M; 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.
1. 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.
1.2 TheTMCPmethod 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.
1.3 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 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.
1.4 The maximum permitted nominal thickness of plates furnished to this specification is 4 in. [100 mm] for GradesA, B, and
3
C; and 1.5 in. [40 mm] for Grades D, ,E,andF.
1.5 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.
2. Referenced Documents
4
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
4
A 578/A 578M Specification for Straight-Beam Ultrasonic Examination of Plain and Clad Steel Plates for SpecialApplications
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 A 20/A 20M,, which outlines the testing and
retesting methods and procedures, permissible variations in dimensions, quality and repair of defects, marking, loading, etc.
3.2 SpecificationA 20/A 20M also establishes the rules for ordering information that should be complied with when purchasing
plates to this specification.
3.2.1 If the plates are to be subjected to warm forming or post-weld heat treatment, the order must indicate the temperatures
and times-at-temperature that will be utilized in such operations. (See 6.1 and Specification A 20/A 20M,, Supplementary
Requirement S3.)
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,
1
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel, Stainless Steel,Steel and RelatedAlloys and is the direct responsibility of Subcommittee
A01.11 on Steel Plates for Boilers and Pressure Vessels.
Current edition approved April 10, 2003.Nov. 1, 2007. Published June 2003.March 2008. Originally approved in 1985. Last previous edition approved in 20012003 as
A 841/A 841M – 013a.
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 A 841 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
International Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
4
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. Fo
...
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