ASTM A841/A841M-03a
(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)
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 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.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: A 841/A 841M – 03a
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. 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 A 20/A 20M Specification for General Requirements for
intended primarily for use in welded pressure vessels. Steel Plates for Pressure Vessels
1.2 The TMCP method consists of rolling-reduction and A 435/A 435M Specification for Straight-Beam Ultrasonic
cooling rate controls that result in mechanical properties in the Examination of Steel Plates
finished plate that are equivalent to those attained using A 577/A 577M Specification for Ultrasonic Angle-Beam
conventional rolling and heat treating processes, which entail Examination of Steel Plates
reheating after rolling. A description of the TMCP method is A 578/A 578M Specification for Straight-Beam Ultrasonic
given in Appendix X1. Examination of Plain and Clad Steel Plates for Special
1.3 DuetotheinherentcharacteristicsoftheTMCPmethod, Applications
the plates cannot be formed at elevated temperatures without
3. General Requirements and Ordering Information
sustaining significant losses in strength and toughness. The
plates may be formed and post-weld heat-treated at tempera- 3.1 Plates supplied to this product specification shall con-
form to Specification A 20/A 20M, which outlines the testing
tures not exceeding 1200°F [650°C], providing the require-
ments of 6.1 are met. and retesting methods and procedures, permissible variations
in dimensions, quality and repair of defects, marking, loading,
1.4 The maximum permitted nominal thickness of plates
furnished to this specification is 4 in. [100 mm] for Grades A, etc.
3
3.2 Specification A 20/A 20M also establishes the rules for
B, and C; and 1.5 in. [40 mm] for Grades D,E,andF.
ordering information that should be complied with when
1.5 The values stated in either inch-pound units or SI units
are to be regarded separately as standard. Within the text, the purchasing plates to this specification.
3.2.1 If the plates are to be subjected to warm forming or
SI units are shown in brackets. The values stated in each
system are not exact equivalents. Therefore, each system must post-weld heat treatment, the order must indicate the tempera-
tures and times-at-temperature that will be utilized in such
be used independently of the other. Combining values from the
two systems may result in nonconformance with this specifi- operations. (See 6.1 and Specification A 20/A 20M, Supple-
mentary Requirement S3.)
cation.
3.3 In addition to the basic requirements of this specifica-
tion, certain supplementary requirements are available when
additional control, testing, or examination is required to meet
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
end use requirements. These include:
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
3.3.1 Vacuum treatment,
A01.11 on Steel Plates for Boilers and Pressure Vessels.
3.3.2 Additional or special tension testing,
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.
3.3.3 Additional or special impact testing, and
2
For ASME Boiler and Pressure Vessel Code applications, see related Specifi-
3.3.4 Nondestructive examination.
cation 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
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
eration at a meeting of the responsible technical committee, which you may attend. the ASTM website.
*ASummary 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 -----
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.