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ASTM A724.pdf
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ASTM A724.pdf
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Designation: A 724/A 724M – 04
Standard Specification for
Pressure Vessel Plates, Carbon-Manganese-Silicon Steel,
Quenched and Tempered, for Welded Pressure Vessels
1
This standard is issued under the fixed designation A 724/A 724M; 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*
1.1 This specification
2
covers three grades of carbon-
manganese-silicon steel, designated Grades A, B, and C. Grade
C may be produced with a boron addition. The plates are
quenched and tempered and are intended for welded-layered
pressure vessels.
1.2 The maximum thickness of plates supplied under this
specification is limited only by the capability of the chemical
composition to meet the specified mechanical requirements.
However, current practice normally limits the maximum thick-
ness to
7
⁄
8
in. [22 mm] for GradesA and B, and to 2 in. [50 mm]
for Grade C.
1.3 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 the specifi-
cation.
2. Referenced Documents
2.1 ASTM Standards:
3
A 20/A 20M 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 A 20/A 20M. These requirements
outline the testing and retesting methods and procedures,
permissible variations in dimensions and weight, quality and
repair of defects, marking, loading, etc.
3.2 Specification A 20/A 20M also establishes the rules for
the ordering information that should be complied with when
purchasing material to this specification.
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
end use requirements. These include:
3.3.1 Vacuum treatment,
3.3.2 Additional or special tension testing,
3.3.3 Impact testing, and
3.3.4 Nondestructive examination.
3.4 The purchaser is referred to the listed supplementary
requirements in this specification and to the detailed require-
ments in Specification A 20/A 20M.
3.5 If the requirements of this specification are in conflict
with the requirements of Specification A 20/A 20M, the re-
quirements of this specification shall prevail.
4. Manufacture
4.1 Steelmaking Process—The steel shall be killed and shall
conform to the fine austenitic grain size requirement of
Specification A 20/A 20M.
5. Heat Treatment
5.1 All plates shall be quenched from a temperature in the
range from 1600 to 1700°F [870 to 925°C]. Grades A and B
shall then be tempered at not less than 1100°F [595°C], and
Grade C shall then be tempered at not less than 1150°F
[620°C]. The tempering soaking time shall be not less than
1
⁄
2
h.
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 July 1, 2004. Published July 2004. Originally approved
in 1975. Last previous edition approved in 1999 as A 724/A 724M – 99.
2
For ASME Boiler and Pressure Vessel Code applications, see related Specifi-
cation SA-724/SA-724M 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.
1
*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.
Copyright ASTM International
Reproduced by IHS under license with ASTM
Not for Resale
No reproduction or networking permitted without license from IHS
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