ASTM A841/A841M-01
(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 which 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 1200oF [650oC], providing the requirements of 6.1 are met.
1.4 The maximum nominal thickness of plates furnished under this specification may not exceed 4 in. [100 mm].
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: A 841/A 841M – 01
Standard Specification for
Steel Plates for Pressure Vessels, Produced by
1
Thermo-Mechanical Control Process (TMCP)
This standard is issued under the fixed designation A 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 A 20/A 20M Specification for General Requirements for
4
2
Steel Plates for Pressure Vessels
1.1 This specification covers steel plates produced by the
A 435/A 435M Specification for Straight-Beam Ultrasonic
thermo-mechanical control process (TMCP). The plates are
4
Examination of Steel Plates
intended primarily for use in welded pressure vessels.
A 577/A 577M Specification for Ultrasonic Angle-Beam
1.2 The TMCP method consists of rolling-reduction and
4
Examination of Steel Plates
cooling rate controls which result in mechanical properties in
A 578/A 578M Specification for Straight-Beam Ultrasonic
the finished plate that are equivalent to those attained using
Examination of Plain and Clad Steel Plates for Special
conventional rolling and heat treating processes which entail
4
Applications
reheating after rolling. A description of the TMCP method is
given in Appendix X1.
3. General Requirements and Ordering Information
1.3 Due to the inherent characteristics of the TMCP method,
3.1 Material supplied to this material specification shall
the plates cannot be formed at elevated temperatures without
conform to Specification A 20/A 20M. These requirements
sustaining significant losses in strength and toughness. The
outline the testing and retesting methods and procedures,
plates may be formed and post-weld heat-treated at tempera-
permissible variations in dimensions, quality and repair of
tures not exceeding 1200°F [650°C], providing the require-
defects, marking, loading, etc.
ments of 6.1 are met.
3.2 Specification A 20/A 20M also establishes the rules for
1.4 The maximum permitted nominal thickness of plates
ordering information which should be complied with when
furnished to this specification is 4 in. [100 mm] for Grades A,
3
purchasing material to this specification.
B and C; and 1.5 in. [40 mm] for Grade D .
3.2.1 When the material is to be subjected to warm forming
1.5 The values stated in either inch-pound units or SI units
or post-weld heat treatment, the order must indicate the
are to be regarded separately as standard. Within the text, the
temperatures and times-at-temperature that will be utilized in
SI units are shown in brackets. The values stated in each
such operations. (See 6.1 and Specification A 20/A 20M,
system are not exact equivalents. Therefore, each system must
Supplementary Requirement S3.)
be used independently of the other. Combining values from the
3.3 In addition to the basic requirements of this specifica-
two systems may result in nonconformance with this specifi-
tion, certain supplementary requirements are available when
cation.
additional control, testing, or examination is required to meet
2. Referenced Documents end use requirements. These include:
3.3.1 Vacuum treatment,
2.1 ASTM Standards:
3.3.2 Additional or special tension testing,
3.3.3 Additional or special impact testing, and
1
3.3.4 Nondestructive examination.
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee
3.4 The purchaser is referred to the listed supplementary
A01.11 on Steel Plates for Boilers and Pressure Vessels.
requirements in this specification and to the detailed require-
Current edition approved March 10, 2001. Published April 2001. Originally
e1 ments in Specification A 20/A 20M.
published as A 841/A 841M – 85. Last previous edition A 841/A 841M – 98 .
2
For ASME Boiler and Pressure Vessel Code applications, see related Specifi- 3.5 If the requirements of this specification are in conflict
cation SA-841/SA-841M in Section II of that Code.
with the requirements of Specification A 20/A 20M, the re-
3
ExxonMobil Upstream Research Company has patents pending concerning the
quirements of this specification shall prevail.
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 the ASTM Headquarters. Your comments will receive careful consideration at a
4
meeting of the responsible technical committee, which you may attend. Annual Book of ASTM Standards, Vol 01.04.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 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.