ASTM A387/A387M-06a
(Specification)Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum
Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum
ABSTRACT
This specification covers chromium-molybdenum alloy steel plates for welded boilers and pressure vessels designed for elevated temperature service. Materials considered under this specification are available in grades 2, 12, 11, 22, 22L, 21, 21L, 5, 9 and 91. The steel materials shall be killed and shall be thermally treated. The steel specimens shall undergo heat analysis and product analysis and shall conform to the chemical requirements for carbon, manganese, phosphorus, sulfur, silicon, chromium, molybdenum, nickel, vanadium, columbium, boron, nitrogen, aluminum, titanium, and zirconium. The steel specimens shall also undergo tension tests and shall conform to the required values of tensile strength, yield strength, and elongation.
SCOPE
1.1 This specification covers chromium-molybdenum alloy steel plates intended primarily for welded boilers and pressure vessels designed for elevated temperature service.
1.2 Plates are available under this specification in several grades having different alloy contents as follows:/p>
1.3 Each grade except Grades 21L, 22L, and 91 is available in two classes of tensile strength levels as defined in the Tensile Requirements tables. Grades 21L and 22L are available only as Class 1. Grade 91 is available only as Class 2.
Grade 911, previously covered by this specification, is now covered by Specification A 1017/A 1017M.
1.4 The maximum thickness of plates is limited only by the capacity of the composition to meet the specified mechanical property requirements.
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
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Used in USDOE-NE Standards
Designation: A387/A387M – 06a
Standard Specification for
Pressure Vessel Plates, Alloy Steel, Chromium-
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Molybdenum
This standard is issued under the fixed designationA387/A387M; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* 2. Referenced Documents
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1.1 This specification covers chromium-molybdenum alloy 2.1 ASTM Standards:
steel plates intended primarily for welded boilers and pressure A20/A20M Specification for General Requirements for
vessels designed for elevated temperature service. Steel Plates for Pressure Vessels
1.2 Plates are available under this specification in several A307 Specification for Carbon Steel Bolts and Studs, 60
grades having different alloy contents as follows: 000 PSI Tensile Strength
A435/A435M Specification for Straight-Beam Ultrasonic
Nominal Nominal
Chromium Molybde-
Examination of Steel Plates
num
A577/A577M Specification for UltrasonicAngle-Beam Ex-
Grade Content, % Content, %
amination of Steel Plates
2 0.50 0.50
12 1.00 0.50
A578/A578M Specification for Straight-Beam Ultrasonic
11 1.25 0.50
Examination of Rolled Steel Plates for Special Applica-
22, 22L 2.25 1.00
21, 21L 3.00 1.00 tions
5 5.00 0.50
A1017/A1017M Specification for Pressure Vessel Plates,
9 9.00 1.00
Alloy Steel, Chromium-Molybdenum-Tungsten
91 9.00 1.00
1.3 Each grade except Grades 21L, 22L, and 91 is available 3. General Requirements and Ordering Information
intwoclassesoftensilestrengthlevelsasdefinedintheTensile
3.1 Material supplied to this material specification shall
Requirements tables. Grades 21Land 22Lare available only as
conform to Specification A20/A20M. These requirements out-
Class 1. Grade 91 is available only as Class 2.
line the testing and retesting methods and procedures, permis-
sible variations in dimensions and weight, quality and repair of
NOTE 1—Grade 911, previously covered by this specification, is now
covered by Specification A1017/A1017M. defects, marking, loading, etc.
3.2 Specification A20/A20M also establishes the rules for
1.4 The maximum thickness of plates is limited only by the
the ordering information that should be complied with when
capacity of the composition to meet the specified mechanical
purchasing material to this specification.
property requirements.
3.3 In addition to the basic requirements of this specifica-
1.5 The values stated in either inch-pound units or SI units
tion, certain supplementary requirements are available when
are to be regarded separately as standard. Within the text, the
additional control, testing, or examination is required to meet
SI units are shown in brackets. The values stated in each
end use requirements. These include:
system are not exact equivalents. Therefore, each system must
3.3.1 Vacuum treatment,
be used independently of the other. Combining values from the
3.3.2 Additional or special tension testing,
two systems may result in nonconformance with this specifi-
3.3.3 Impact testing, and
cation.
3.3.4 Nondestructive examination.
3.4 The purchaser is referred to the listed supplementary
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requirements in this specification and to the detailed require-
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
ments in Specification A20/A20M. If the requirements of this
A01.11 on Steel Plates for Boilers and Pressure Vessels.
Current edition approved Oct. 1, 2006. Published October 2006. Originally
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approved in 1955. Last previous edition approved in 2005 as A387/A387M – 05a. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
DOI: 10.1520/A0387_A0387M-06A. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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For ASME Boiler and Pressure Vessel Code applications, see related Specifi- Standards volume information, refer to the standard’s Document Summary page on
cation SA-387/SA-387M in Section II of that Code. 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.
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A387/A387M – 06a
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TABLE 1 Chemical Requirements
Composition, %
Grade and UNS Number
Element
Grade 2 Grade 12 Grade 11 Grade 22 Grade 22L Grade 21 Grade 21L Grade 5 Grade 9 Grade 91
S50460 K11757 K11789 K21590 K21590 K31545 K31545 S50200 K90941 K91560
Carbon:
A A
Heat analysis 0.05–0.21 0.05–0.17 0.05–0.17 0.05–0.15 0.
...
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