ASTM A542/A542M-99e1
(Specification)Standard Specification for Pressure Vessel Plates, Alloy Steel, Quenched-and-Tempered, Chromium-Molybdenum, and Chromium-Molybdenum-Vanadium
Standard Specification for Pressure Vessel Plates, Alloy Steel, Quenched-and-Tempered, Chromium-Molybdenum, and Chromium-Molybdenum-Vanadium
SCOPE
1.1 This specification covers two types of 21/4 Cr-1 Mo and three types of Cr-Mo-V alloy steel plates for use in the quenched-and-tempered condition, intended for the fabrication of welded pressure vessels and components.
1.2 Material under this specification is available in five types, designated "A," "B," "C,"" D," and "E." Type B is identical to Type A except for restrictive limits for carbon, phosphorus, sulfur, and nickel. The material is also available in five classes having the following strength levels. Type E is available only as Class 4 and 4a. ClassMinimum Tensile Strength, ksi [MPa] 1 105 [725] 2 115 [795] 3 95 [655] 4 and 4a 85 [585]
1.3 The maximum thickness of plates is limited only by the capacity of the chemical composition to meet the specified mechanical property requirements.
1.4 The minimum thickness of plates is limited to 3/16 in. [5 mm].
1.5 The material is intended to be suitable for fusion welding. Welding technique is of fundamental importance and it is presupposed that welding procedures will be in accordance with approved methods.
1.6 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: A 542/A 542M – 99
Standard Specification for
Pressure Vessel Plates, Alloy Steel, Quenched-and-
Tempered, Chromium-Molybdenum, and Chromium-
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Molybdenum-Vanadium
This standard is issued under the fixed designation A 542/A 542M; 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.
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e NOTE—Editorial changes were made in June 2001.
1. Scope 2. Referenced Documents
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1.1 This specification covers two types of 2 ⁄4 Cr-1 Mo and 2.1 ASTM Standards:
three types of Cr-Mo-V alloy steel plates for use in the A 20/A 20M Specification for General Requirements for
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quenched-and-tempered condition, intended for the fabrication Steel Plates for Pressure Vessels
of welded pressure vessels and components. A 370 Test Methods and Definitions for Mechanical Testing
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1.2 Material under this specification is available in five of Steel Products
types, designated “A,” “B,” “C,”“ D,” and “E.” Type B is A 435/A 435M Specification for Straight-Beam Ultrasonic
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identical to Type A except for restrictive limits for carbon, Examination of Steel Plates
phosphorus, sulfur, and nickel. The material is also available in A 577/A 577M Specification for Ultrasonic Angle-Beam
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five classes having the following strength levels. Type E is Examination of Steel Plates
available only as Class 4 and 4a. A 578/A 578M Specification for Straight-Beam Ultrasonic
Examination of Plain and Clad Steel Plates for Special
Class Minimum Tensile Strength, ksi [MPa]
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Applications
1 105 [725]
2 115 [795]
3. General Requirements and Ordering Information
3 95 [655]
4 and 4a 85 [585]
3.1 Material supplied to this material specification shall
conform to Specification A 20/A 20M. These requirements
1.3 The maximum thickness of plates is limited only by the
outline the testing and retesting methods and procedures,
capacity of the chemical composition to meet the specified
permissible variations in dimensions, and mass, quality and
mechanical property requirements.
3 repair of defects, marking, loading, etc.
1.4 The minimum thickness of plates is limited to ⁄16 in. [5
3.2 Specification A 20/A 20M also establishes the rules for
mm].
the ordering information which should be complied with when
1.5 The material is intended to be suitable for fusion
purchasing material to this specification.
welding. Welding technique is of fundamental importance and
3.3 In addition to the basic requirements of this specifica-
it is presupposed that welding procedures will be in accordance
tion, certain supplementary requirements are available when
with approved methods.
additional control, testing, or examination is required to meet
1.6 The values stated in either inch-pound units or SI units
end use requirements. These include:
are to be regarded separately as standard. Within the text, the
3.3.1 Vacuum treatment,
SI units are shown in brackets. The values stated in each
3.3.2 Additional or special tension testing,
system are not exact equivalents, therefore, each system must
3.3.3 Impact testing, and
be used independently of the other. Combining values from the
3.3.4 Nondestructive examination.
two systems may result in nonconformance with this specifi-
3.4 The purchaser is referred to the supplementary require-
cation.
ments listed 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
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This specification is under the jurisdiction of ASTM Committee A01 on Steel,
with the requirements of Specification A 20/A 20M, the re-
Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee
quirements of this specification shall prevail.
A01.11 on Steel Plates for Boiler and Pressure Vessels.
Current edition approved March 10, 1999. Published June 1999. Originally
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published as A 542 – 65. Last previous edition A 542/A 542M – 95 .
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For ASME Boiler and Pressure Vessel Code applications, see related Specifi- Annual Book of ASTM Standards, Vol 01.04.
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cation SA-542 in Section II of that Code. Annual Book of ASTM Standards, Vol 01.01.
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A 542/A 542M – 99
4. Manufacture 5.4 When the purchaser elects to perform the heat treatment
required above, the material manufacturer shall temper the
4.1 Steelmaking Practice—The steel shall be killed and
plates prior to shipment at a temperature not lower than 1050°F
shall conform to the fine austenitic grain size requirement of
[565°C] for Types A, B, C, and D and not
...
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