ASTM A204/A204M-17

Standard Specification for Pressure Vessel Plates, Alloy Steel, Molybdenum

ABSTRACT
This specification covers molybdenum alloy steel plates, intended particularly for welded boilers and other pressure vessels. Plates under this specification are available in three grades having different strength levels: Grade A; Grade B; and Grade C. The steel shall be killed. The steel shall conform to the chemical requirements specified. Tension tests on plates shall conform to the requirements specified.
SCOPE
1.1 This specification2 covers molybdenum-alloy steel plates, intended particularly for welded boilers and other pressure vessels.  
1.2 Plates under this specification are available in three grades having different strength levels as follows:    
Grade  
Tensile Strength, ksi [MPa]  
A  
65–85 [450–585]  
B  
70–90 [485–620]  
C  
75–95 [515–655]  
1.3 The maximum thickness of plates is limited only by the capacity of the composition to meet the specified mechanical property requirements.  
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 this specification.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Historical
• Publication Date: 31-Oct-2017
• ICS: 77.140.30 - Steels for pressure purposes
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.11 - Steel Plates for Boilers and Pressure Vessels

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: A204/A204M −17
Standard Specification for
1
Pressure Vessel Plates, Alloy Steel, Molybdenum
This standard is issued under the fixed designationA204/A204M; 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 U.S. Department of Defense.
1. Scope* A435/A435M Specification for Straight-Beam Ultrasonic
2
Examination of Steel Plates
1.1 This specification covers molybdenum-alloy steel
A577/A577M Specification for Ultrasonic Angle-Beam Ex-
plates, intended particularly for welded boilers and other
amination of Steel Plates
pressure vessels.
A578/A578M Specification for Straight-Beam Ultrasonic
1.2 Plates under this specification are available in three
Examination of Rolled Steel Plates for Special Applica-
grades having different strength levels as follows:
tions
Grade Tensile Strength, ksi [MPa]
A 65–85 [450–585]
B 70–90 [485–620] 3. General Requirements and Ordering Information
C 75–95 [515–655]
3.1 Material supplied to this material specification shall
1.3 The maximum thickness of plates is limited only by the
conform to Specification A20/A20M. These requirements out-
capacity of the composition to meet the specified mechanical
line the testing and retesting methods and procedures, permit-
property requirements.
ted variations in dimensions, and mass, quality and repair of
1.4 The values stated in either inch-pound units or SI units
defects, marking, loading, and ordering information.
are to be regarded separately as standard. Within the text, the
3.2 In addition to the basic requirements of this
SI units are shown in brackets. The values stated in each
system are not exact equivalents; therefore, each system must specification, certain supplementary requirements are available
be used independently of the other. Combining values from the when additional control, testing, or examination is required to
two systems may result in nonconformance with this specifi-
meet end use requirements. The purchaser is referred to the
cation.
listed supplementary requirements in this specification and to
the detailed requirements in Specification A20/A20M.
1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard-
3.3 Coils are excluded from qualification to this specifica-
ization established in the Decision on Principles for the
tion until they are processed into finished plates. Plates
Development of International Standards, Guides and Recom-
produced from coil means plates that have been cut to
mendations issued by the World Trade Organization Technical
individuallengthsfromcoil.Theprocessordirectlycontrols,or
Barriers to Trade (TBT) Committee.
is responsible for, the operations involved in the processing of
coils into finished plates. Such operations include decoiling,
2. Referenced Documents
3 leveling, cutting to length, testing, inspection, conditioning,
2.1 ASTM Standards:
heat treatment (if applicable), packaging, marking, loading for
A20/A20M SpecificationforGeneralRequirementsforSteel
shipment, and certification.
Plates for Pressure Vessels
NOTE 1—For plates produced from coil and furnished without heat
treatment or with stress relieving only, three test results are reported for
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
each qualifying coil. Additional requirements regarding plates from coil
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
are described in Specification A20/A20M.
A01.11 on Steel Plates for Boilers and Pressure Vessels.
Current edition approved Nov. 1, 2017. Published November 2017. Originally
3.4 If the requirements of this specification are in conflict
approved in 1937. Last previous edition approved in 2012 as A204/A204M – 12.
DOI: 10.1520/A0204_A0204M-17.
with the requirements of Specification A20/A20M, the require-
2
For ASME Boiler and Pressure Vessel Code applications, see related Specifi-
ments of this specification shall prevail.
cation SA-204/SA 204M in Section II of that Code.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM 4. Materials and Manufacture
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 4.1 Steelmaking Practice—The steel shall be killed.
*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
1

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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: A204/A204M − 12 A204/A204M − 17
Standard Specification for
1
Pressure Vessel Plates, Alloy Steel, Molybdenum
This standard is issued under the fixed designation A204/A204M; 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 U.S. Department of Defense.
1. Scope*
2
1.1 This specification covers molybdenum-alloy steel plates, intended particularly for welded boilers and other pressure
vessels.
1.2 Plates under this specification are available in three grades having different strength levels as follows:
Grade Tensile Strength, ksi [MPa]
A 65–85 [450–585]
B 70–90 [485–620]
C 75–95 [515–655]
1.3 The maximum thickness of plates is limited only by the capacity of the composition to meet the specified mechanical
property requirements; however, current practice normally limits the maximum thickness of plates furnished under this
specification as follows: requirements.
Grade Maximum Thickness, in. [mm]
A 6 [150]
B 6 [150]
C 4 [100]
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 this specification.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
3
2.1 ASTM Standards:
A20/A20M Specification for General Requirements 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 Material supplied to this material specification shall conform to Specification A20/A20M. These requirements outline the
testing and retesting methods and procedures, permitted variations in dimensions, and mass, quality and repair of defects, marking,
loading, and ordering information.
3.2 In 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. The purchaser is referred to the listed supplementary
requirements in this specification and to the detailed requirements in Specification A20/A20M.
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 May 1, 2012Nov. 1, 2017. Published June 2012November 2017. Originally approved in 1937. Last previous edition approved in 20072012 as
A204/A204M – 03 (2007).A204/A204M – 12. DOI: 10.1520/A0204_A0204M-12.10.1520/A0204_A0204M-17.
2
For ASME Boiler and Pressure Vessel Code applications, see related Specification SA-204/SA 204M in Section II of that Code.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*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
1

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A204/A204M − 17
TABLE 1 Chemical Requirements
Composition, %
Element
Grade A Grade B Grade C
A
Carbon, max:
Up to 1 in. [25 mm] 0.18 0.20 0.23
incl, in thickness
Over 1 in. to 2 in. [50 mm] 0.21 0.23 0.26
incl, in thickness
Over 2 in. to 4 in. [100 mm] 0.23 0.25 0.28
incl, in thickness
Over 4 in. [100 mm] 0.25 0.27 0.28
in thickness
Manganese, max:
Heat analysis 0.90 0.90 0.90
Product analysis 0.98 0.98 0.98
A
Phosphorous, max 0
...