ASTM A204/A204M-17(2022)
(Specification)Standard Specification for Pressure Vessel Plates, Alloy Steel, Molybdenum
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
- Published
- Publication Date
- 31-Aug-2022
- Technical Committee
- A01 - Steel, Stainless Steel and Related Alloys
- Drafting Committee
- A01.11 - Steel Plates for Boilers and Pressure Vessels
Relations
- Effective Date
- 01-Nov-2023
- Effective Date
- 01-Nov-2023
- Effective Date
- 01-Nov-2023
- Effective Date
- 01-Mar-2018
- Effective Date
- 15-Nov-2017
- Effective Date
- 01-Nov-2017
- Effective Date
- 01-Nov-2015
- Effective Date
- 01-Oct-2014
- Effective Date
- 01-Oct-2013
- Effective Date
- 01-Mar-2012
- Effective Date
- 01-Mar-2012
- Effective Date
- 01-Mar-2012
- Effective Date
- 01-Nov-2011
- Effective Date
- 01-Oct-2010
- Effective Date
- 01-Oct-2009
Overview
ASTM A204/A204M-17(2022): Standard Specification for Pressure Vessel Plates, Alloy Steel, Molybdenum is an international standard developed by ASTM for the specification of molybdenum-alloy steel plates. These plates are particularly intended for use in the manufacture of welded boilers and other pressure vessels. The standard defines chemical and mechanical requirements for plates available in three different grades (A, B, and C), each with specific tensile strength levels. Complying with the ASTM A204/A204M-17(2022) standard helps ensure material performance, quality, and safety in pressure vessel applications.
Key Topics
- Material Grades and Strengths
- Three grades of molybdenum alloy steel are specified:
- Grade A: Tensile strength 65–85 ksi [450–585 MPa]
- Grade B: Tensile strength 70–90 ksi [485–620 MPa]
- Grade C: Tensile strength 75–95 ksi [515–655 MPa]
- Three grades of molybdenum alloy steel are specified:
- Chemical and Mechanical Requirements
- Specific chemical composition limits for elements such as carbon, manganese, phosphorus, sulfur, silicon, and molybdenum.
- Mechanical properties include minimum yield strength and elongation, tailored to each grade.
- The steel must be 'killed' (fully deoxidized) during manufacturing.
- Thickness and Processing
- No fixed upper limit on plate thickness, except as governed by compliance with mechanical properties.
- Plates may be supplied as-rolled, normalized, normalized and tempered, or stress relieved based on thickness and purchaser needs.
- Plates produced from coil must be processed and certified according to standard requirements.
- Dual Units
- The standard allows for both inch-pound and SI units, which must be used independently to avoid nonconformance.
- Supplementary Requirements
- Optional requirements include vacuum treatment, additional tensile or impact testing, ultrasonic, and magnetic particle examination for enhanced quality assurance.
Applications
- Pressure Vessels
- Ideal for the fabrication of welded pressure vessels used in various industries, including oil and gas, chemical processing, and power generation.
- Boilers
- Widely used for boiler construction where high-temperature and pressure resistance is critical.
- Industrial Equipment
- Suitable for other high-stress applications demanding reliable mechanical strength and durability.
- Custom Fabrications
- Frequently specified in custom-built components where traceability, quality control, and compliance with recognized standards are required.
By specifying ASTM A204/A204M-17(2022) compliant plates, manufacturers gain:
- Enhanced safety and reliability in service
- Compliance with regulatory and industry best practices
- Consistent mechanical and chemical properties for predictable performance
Related Standards
Organizations and manufacturers referencing ASTM A204/A204M-17(2022) may also consider the following associated standards:
- ASTM A20/A20M: General Requirements for Steel Plates for Pressure Vessels. Outlines testing, dimensional tolerances, and supplementary requirements.
- ASTM A435/A435M: Straight-Beam Ultrasonic Examination of Steel Plates to identify internal discontinuities.
- ASTM A577/A577M: Ultrasonic Angle-Beam Examination for advanced inspection of plates.
- ASTM A578/A578M: Straight-Beam Ultrasonic Examination for rolled steel plates used in special applications.
- ASME SA-204/SA-204M: Equivalent ASME standard for use in boiler and pressure vessel code applications.
Summary
Adhering to ASTM A204/A204M-17(2022) ensures that pressure vessel plates made from molybdenum-alloy steel meet stringent international standards for quality and performance. This not only facilitates regulatory compliance but also supports the safe, efficient, and reliable operation of critical equipment in industrial environments. For pressure vessel designers, fabricators, and engineers, referencing this standard is essential for quality assurance in manufacturing and procurement.
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Frequently Asked Questions
ASTM A204/A204M-17(2022) is a technical specification published by ASTM International. Its full title is "Standard Specification for Pressure Vessel Plates, Alloy Steel, Molybdenum". This standard covers: 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.
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.
ASTM A204/A204M-17(2022) is classified under the following ICS (International Classification for Standards) categories: 77.140.30 - Steels for pressure purposes. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM A204/A204M-17(2022) has the following relationships with other standards: It is inter standard links to ASTM A578/A578M-17(2023), ASTM A435/A435M-17(2023), ASTM A577/A577M-17(2023), ASTM A20/A20M-18, ASTM A20/A20M-17, ASTM A578/A578M-17, ASTM A20/A20M-15, ASTM A20/A20M-14, ASTM A20/A20M-13, ASTM A577/A577M-90(2012), ASTM A435/A435M-90(2012), ASTM A578/A578M-07(2012), ASTM A20/A20M-11, ASTM A20/A20M-10, ASTM A20/A20M-09. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM A204/A204M-17(2022) is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
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.
Designation: A204/A204M −17 (Reapproved 2022)
Standard Specification for
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
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
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 Sept. 1, 2022. Published September 2022. Originally
3.4 If the requirements of this specification are in conflict
approved in 1937. Last previous edition approved in 2017 as A204/A204M – 17.
DOI: 10.1520/A0204_A0204M-17R22.
with the requirements of Specification A20/A20M, the require-
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.
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 4. Materials and Manufacture
Standards volume inf
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