ASTM A302/A302M-03(2007)
(Specification)Standard Specification for Pressure Vessel Plates, Alloy Steel, Manganese-Molybdenum and Manganese-Molybdenum-Nickel
Standard Specification for Pressure Vessel Plates, Alloy Steel, Manganese-Molybdenum and Manganese-Molybdenum-Nickel
ABSTRACT
This specification covers manganese-molybdenum and manganese-molybdenum-nickel alloy steel plates intended particularly for welded boilers and other pressure vessels. According to their strength levels, the plates are available in four grades: Grades A, B, C, and D. The maximum thickness of plates is limited only by the capacity of the chemical composition to meet the specified mechanical property requirements. The steel shall be killed and shall conform to fine grain size requirements. The plates shall be subjected to tension test to determine the tensile strength, yield strength, and elongation.
SCOPE
1.1 This specification covers manganese-molybdenum and manganese-molybdenum-nickel alloy steel plates intended particularly for welded boilers and other pressure vessels.
1.2 Plates under this specification are available in four grades having different strength levels as follows:
GradeTensile Strength,
ksi [MPa]Type A75–95 [515–655] manganese-molybdenum B80–100 [550–690]manganese-molybdenum C80–100 [550–690]manganese-molybdenum-nickel D80–100 [550–690]manganese-molybdenum-nickel
1.3 The maximum thickness of plates is limited only by the capacity of the chemical composition to meet the specified mechanical property requirements. The minimum thickness is limited to 0.25 in. [6.5 mm].
1.4 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 specification.
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Designation: A302/A302M – 03 (Reapproved 2007)
Standard Specification for
Pressure Vessel Plates, Alloy Steel, Manganese-
Molybdenum and Manganese-Molybdenum-Nickel
This standard is issued under the fixed designationA302/A302M; 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
2 3
1.1 This specification covers manganese-molybdenum and 2.1 ASTM Standards:
manganese-molybdenum-nickel alloy steel plates intended par- A20/A20M Specification for General Requirements for
ticularly for welded boilers and other pressure vessels. Steel Plates for Pressure Vessels
1.2 Plates under this specification are available in four A435/A435M Specification for Straight-Beam Ultrasonic
grades having different strength levels as follows: Examination of Steel Plates
A577/A577M Specification for UltrasonicAngle-Beam Ex-
Tensile Strength,
Grade Type
ksi [MPa]
amination of Steel Plates
A 75–95 [515–655] manganese-molybdenum
A578/A578M Specification for Straight-Beam Ultrasonic
B 80–100 [550–690] manganese-molybdenum
Examination of Rolled Steel Plates for Special Applica-
C 80–100 [550–690] manganese-molybdenum-nickel
D 80–100 [550–690] manganese-molybdenum-nickel
tions
1.3 The maximum thickness of plates is limited only by the
3. General Requirements and Ordering Information
capacity of the chemical composition to meet the specified
3.1 Plates supplied to this product specification shall con-
mechanical property requirements. The minimum thickness is
form to Specification A20/A20M, which outlines the testing
limited to 0.25 in. [6.5 mm].
and retesting methods and procedures, permissible variations
1.4 The values stated in either inch-pound units or SI units
in dimensions and mass, quality and repair of defects, marking,
are to be regarded separately as standard. Within the text, the
loading, and so forth.
SI units are shown in brackets. The values stated in each
3.2 Specification A20/A20M also establishes the rules for
system are not exact equivalents; therefore, each system must
ordering information that should be complied with when
be used independently of the other. Combining values from the
purchasing plates to this specification.
two systems may result in nonconformance with the specifi-
3.3 In addition to the basic requirements of this specifica-
cation.
tion, certain supplementary requirements are available where
additional control, testing, or examination is required to meet
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
end use requirements.
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 Nov. 1, 2007. Published March 2008. Originally
approved in 1947. Last previous edition approved in 2003 as A302/A302M – 03. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
DOI: 10.1520/A0302_A0302M-03R07. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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-302/SA-302M 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.
A302/A302M – 03 (2007)
3.4 The purchaser is referred to the listed supplementary 5.3 When normalizing plates 4 in. [100 mm] or over in
requirements in this specification and to the detailed require- thickness,thecoolingratemaybeacceleratedbyairblastingor
ments in Specification A20/A20M. liquid quenching to obtain mechanical properties comparable
3.5 Coils are excluded from qualification to this specifica- to those developed by normalizing plates in the lesser thick-
tion until they are processed into finished plates. Plates nesses.
produced from coil means plates that have been cut to 5.4 If approved by the purchaser, for plates less than 4 in.
individuallengthsfromcoil.Theprocessordirectlycontrols,or [100 mm] in thickness, cooling rates faster than those obtained
is responsible for, the operations involved in the processing of by cooling in air are permissible for improvement of tough-
coils into finished plates. Such operations include decoiling, ness, provided the plates are subsequently tempered in the
leveling, cutting to length, testing, inspection, conditioning, temperature range from 1100 to 1300°F [595 to 705°C].
heat treatment (if applicable), packaging, marking, loading for
6. Chemical Composition
shipment, and certification.
6.1 The steel shall conform to the chemical requirements
NOTE 1—For plates produced from coil and furnished without heat
shown inTable 1 unless otherwise modified in accordance
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:A 302/A 302M–03 Designation: A302/A302M – 03 (Reapproved 2007)
Standard Specification for
Pressure Vessel Plates, Alloy Steel, Manganese-
Molybdenum and Manganese-Molybdenum-Nickel
This standard is issued under the fixed designationA302/A302M; 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*
1.1 This specification covers manganese-molybdenum and manganese-molybdenum-nickel alloy steel plates intended
particularly for welded boilers and other pressure vessels.
1.2 Plates under this specification are available in four grades having different strength levels as follows:
Tensile Strength,
Grade Type
ksi [MPa]
Grade Tensile Strength, ksi [MPa] Type
A
A 75–95 [515–655] Mn-Mo B
B 80–100 [550–690] Mn-Mo C
C 80–100 [550–690] Mn-Mo-Ni
D 80–100 [550–690] Mn-Mo-NiD
1.3 The maximum thickness of plates is limited only by the capacity of the chemical composition to meet the specified
mechanical property requirements. The minimum thickness is limited to 0.25 in. [6.5 mm].
1.4 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 specification.
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel,Steel and Related Alloys and is the direct responsibility of Subcommittee
A01.11 on Steel Plates for Boilers and Pressure Vessels.
´1
Current edition approved Sept. 10, 2003. Published October 2003. Originally approved in 1947. Last previous edition approved in 1997 as A 302/A 302M–97 .
Current edition approved Nov. 1, 2007. Published March 2008. Originally approved in 1947. Last previous edition approved in 2003 as A302/A302M – 03. DOI:
10.1520/A0302_A0302M-03R07.
For ASME Boiler and Pressure Vessel Code applications, see related Specification SA-302/SA-302M in Section II of that Code.
*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.
A302/A302M – 03 (2007)
2. Referenced Documents
2.1 ASTM Standards:
A20/A20M Specification for General Requirements for Steel Plates for Pressure Vessels Specification for General Require-
ments for Steel Plates for Pressure Vessels
A435/A435M Specification for Straight-Beam Ultrasonic Examination of Steel Plates
A577/A577M Specification for Ultrasonic Angle-Beam Examination of Steel Plates
A578/A578M Specification for Straight-Beam Ultrasonic Examination of Rolled Steel Plates for Special Applications
3. General Requirements and Ordering Information
3.1 Plates supplied to this product specification shall conform to Specification A 20A20/A20M/A 20M,, which outlines the
testing and retesting methods and procedures, permissible variations in dimensions and mass, quality and repair of defects,
marking, loading, and so forth.
3.2 SpecificationA20A20/A20M/A20M also establishes the rules for ordering information that should be complied with when
purchasing plates to this specification.
3.3 Inadditiontothebasicrequirementsofthisspecification,certainsupplementaryrequirementsareavailablewhereadditional
control, testing, or examination is required to meet end use requirements.
3.4 The purchaser is referred to the listed supplementary requirements in this specification and to the detailed requirements in
Specification A 20A20/A20M/A 20M.
3.5 Coils are excluded from qualification to this specification until they are processed into finished plates. Plates produced from
coil means plates that have been cut to individual lengths from coil. The processor directly controls, or is responsible for, the
operations involved in the processing of coils into finished plates. Such operations include decoiling, leveling, cutting to length,
testing, inspection, conditioning, heat treatment (if applicable), packaging, marking, loading for shipment, and certification.
NOTE 1—For plates produced from coil and furnished without heat treatment or with stress relieving only, three test results are reported for each
qualifying coil. Additional requirements regarding plates from coil are described in Specification A20/A20M.
3.6 If the requirements of this specification are in conflict with the requirements of Specification A 20A20/A20M/A 20M,, the
requirements of this specification shall prevail.
4. Materials and Manufacture
4.1 Steelmaking Practice—The steel shall be killed and shall conform to the fine grain size requirement of Specification
A20/A20M.
5. Heat Treatment
5.1 Plates 2 in. [50 mm] and under in thickness are normally supplied in the as-rolled condition. Plates may be ordered
normalized or stress relieved, or both.
5.2 Plates over 2 in. [50 mm] in thickness shall be normalized.
5.3 When normalizing plates 4 in. [100 mm] or over in thickness, the cooling rate may be accelerated by air blasting or liquid
quenching to obtain mechanical properties comparable to those developed by normalizing plates in the lesser thicknesses.
5.4 If approved by the purchaser, for plates less than 4 in. [100 mm] in thickness, cooling rates faster than those obtained by
cooling in air are permissible for improvement of toughness, provided the plates are subsequently tempered in the temperature
range from 1100 to 1300°F [595 to 705°C].
6. Chemical Composition Chemical Composition
6.1 The steel shall conform to the chemical requirements shown in Table 1 unless otherwise modified in accordance with
Supplementary Requirement S17, Vacuum Carbon-Deoxidized Steel, in Specifi
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
e1
Designation:A 302/A 302M–97 Designation: A 302/A 302M – 03 (Reapproved 2007)
Standard Specification for
Pressure Vessel Plates, Alloy Steel, Manganese-
Molybdenum and Manganese-Molybdenum-Nickel
This standard is issued under the fixed designationA 302/A 302M; 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.
This standard has been approved for use by agencies of the Department of Defense.
e NOTE—Editorial corrections were made to this standard in August 1999.
1. Scope*
1.1 This specification covers manganese-molybdenum and manganese-molybdenum-nickel alloy steel plates intended
particularly for welded boilers and other pressure vessels.
1.2Material1.2 Plates under this specification isare available in four grades having different strength levels as follows:
Tensile Strength,
Grade Type
ksi [MPa]
Grade Tensile Strength, ksi [MPa] Type
A
A 75–95 [515–655] Mn-Mo B
B 80–100 [550–690] Mn-Mo C
C 80–100 [550–690] Mn-Mo-Ni
D 80–100 [550–690] Mn-Mo-NiD
1.3 The maximum thickness of plates is limited only by the capacity of the chemical composition to meet the specified
mechanical property requirements. The minimum thickness is limited to 0.25 in. [6.5 mm].
1.4 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 specification.
2. Referenced Documents
2.1 ASTM Standards:
A 20/A 20M Specification for General Requirements for Steel Plates for Pressure Vessels
A 435/A 435M Specification for Straight-Beam Ultrasonic Examination of Steel Plates
A 577/A 577M Specification for Ultrasonic Angle-Beam Examination of Steel Plates
A 578/A 578M Specification for Straight-Beam Ultrasonic Examination of Rolled Steel Plates for Special Applications
3. General Requirements and Ordering Information
3.1Material supplied to this material specification shall conform to Specification A20/A20M. These requirements outline the
testing and retesting methods and procedures, permissible variations in dimensions, and mass, quality and repair of defects,
marking, loading, etc.
3.2Specification A20/A20M also establishes the rules for ordering information that should be complied with when purchasing
material to this specification.
3.3In addition to the basic requirements of this specification, certain supplementary requirements are available when additional
control, testing, or examination is required to meet end use requirements. These include:
3.3.1Vacuum treatment,
3.3.2Additional or special tension testing,
ThisspecificationisunderthejurisdictionofASTMCommitteeA-1A01onSteel,StainlessSteel,SteelandRelatedAlloysandisthedirectresponsibilityofSubcommittee
A01.11 on Steel Plates for Boilers and Pressure Vessels.
CurrenteditionapprovedMarch10,1997.Nov.1,2007.PublishedNovember1997.March2008.OriginallypublishedasA302–47T.approvedin1947.Lastpreviousedition
approved in 2003 as A 302/A 302M – 903.
For ASME Boiler and Pressure Vessel Code applications, see related Specification SA-302/SA-302M in Section II of that Code.
Annual Book of ASTM Standards, Vol 01.04.
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book ofASTM Standards
volume information, refer to the standard’s Document Summary page on 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.
A 302/A 302M – 03 (2007)
3.3.3Impact testing, and
3.3.4Nondestructive examination.
3.4The purchaser is referred to the listed supplementary requirements in this specification and to the detailed requirements in
Specification A20/A20M.
3.5If the requirements of this specification are in conflict with the requirements of Specification A20/A20M, the requirements
of this specification shall prevail. General Requirements and Ordering Information
3.1 Plates supplied to this product specification shall conform to Specification A 20/A 20M, which outlines the testing and
retesting methods and procedures, permissible variations in dimensions and mass, quality and repair of defects, marking, loading,
and so forth.
3.2 SpecificationA 20/A 20M also establishes the rules for ordering information that should be complied with when purchasing
plates to this specification.
3.3 Inadditiontothebasicrequirementsofthisspecification,certainsupplementaryrequirementsareavailablewhereadditional
control, testing, or examination is required to meet end use requirements.
3.4 The purchaser is referred to the listed supplementary requirements in this specification and to the detailed requirements in
Specification A 20/A 20M.
3.5 Coils are excluded from qualification to this specification until they are processed into finished plates. Plates produced from
coil means plates that have been cut to individual lengths from coil. The processor directly controls, or is responsible for, the
operations involved in the processing of coils into finished plates. Such operations include decoiling, leveling, cutting to length,
testing, inspection, conditioning, heat treatment (if applicable), packaging, marking, loading for shipment, and certification.
NOTE 1—For plates produced from coil and furnished without heat treatment or with stress relieving only, three test results are reported for each
qualifying coil. Additional requirements regarding plates from coil are described in Specification A 20/A 20M.
TABLE 2 1 Tensile Requirements
Composition, %
Elements
Grade A Grade B Grade C Grade D
Tensile strength, ksi [MPa] 75–95
[515–655]
A
Carbon, max:
80–100 0.20 0.20 0.20 0.20
[550–690]
80–100 0.20 0.20 0.20 0.20
80–100 0.23 0.23 0.23 0.23
[550–690]
80–100 0.23 0.23 0.23 0.23
80–100 [ 5 5 0–69.25 0]
80–100 0.25 0.25 0.25 0.25
Yield strength, min, ksi [MPa] 45 50
[310] [345]
Manganese:
50 0.95–1.30 1.15–1.50 1.15–1.50 1.15–1.50
[345]
50 0.95–1.30 1.15–1.50 1.15–1.50 1.15–1.50
50 [3 45] 1.07–1.62 1.07–1.62 1.07–1.62
50 0.87–1.41 1.07–1.62 1.07–1.62 1.07–1.62
A
Elongation in 8
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