ASTM A372/A372M-20e1

Standard Specification for Carbon and Alloy Steel Forgings for Thin-Walled Pressure Vessels

ABSTRACT
This specification deals with carbon and alloy steel forgings (including gas bottles) for use in thin-walled pressure vessels. Covered here are the following grades of steel forgings: Grade A; Grade B; Grade C; Grade D; Grade E, Classes 55, 65, and 70; Grade F, Classes 55, 65, and 70; Grade G, Classes 55, 65, and 70; Grade H, Classes 55, 65, and 70; Grade J, Classes 55, 65, and 70; Grade K; Grade L; Grade J, Class 110; and Grade M, Classes 85 and 100. Materials shall be manufactured by melting procedures, and optionally heat treated by normalization, normalization and tempering, or liquid-quenching and tempering. Heat and product analyses shall be performed wherein steel specimens shall conform to required chemical compositions of carbon, manganese, phosphorus, sulfur, silicon, nickel, chromium, molybdenum, and vanadium. Steel materials shall also undergo bending, flattening and hardness tests and shall conform to required values of tensile strength, yield strength, elongation, and hardness. Forgings shall be subjected to magnetic particle examination as well.
SCOPE
1.1 This specification2 covers relatively thin-walled forgings (including gas bottles) for pressure vessel use. Three types of carbon steel and six types of alloy steel are included. Provision is made for integrally forging the ends of vessel bodies made from seamless pipe or tubing.
Note 1: When working to the chemical and tensile requirements of this specification, the influence of wall thickness and cooling rate will necessarily eliminate certain forging sizes in each class.
Note 2: Designations have been changed as follows:
Current  
Formerly  
Grade A  
Type I  
Grade B  
Type II  
Grade C  
Type III  
Grade D  
Type IV  
Grade E Class 55  
Type V Grade 1 Class 55  
Grade E Class 65  
Type V Grade 1 Class 65  
Grade E Class 70  
Type V Grade 1 Class 70  
Grade F Class 55  
Type V Grade 2 Class 55  
Grade F Class 65  
Type V Grade 2 Class 65  
Grade F Class 70  
Type V Grade 2 Class 70  
Grade G Class 55  
Type V Grade 3 Class 55  
Grade G Class 65  
Type V Grade 3 Class 65  
Grade G Class 70  
Type V Grade 3 Class 70  
Grade H Class 55  
Type V Grade 4 Class 55  
Grade H Class 65  
Type V Grade 4 Class 65  
Grade H Class 70  
Type V Grade 4 Class 70  
Grade J Class 55  
Type V Grade 5 Class 55  
Grade J Class 65  
Type V Grade 5 Class 65  
Grade J Class 70  
Type V Grade 5 Class 70  
Grade K  
Type VI  
Grade L  
Type VII  
Grade J Class 110  
Type VIII  
Grade M Class 85  
Type IX Class A  
Grade M Class 100  
Type IX Class B  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
1.3 Unless the order specifies the applicable “M” specification designation (SI units), the material shall be furnished to inch-pound units.  
1.4 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: 29-Feb-2020
• ICS: 77.140.85 - Iron and steel forgings
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.06 - Steel Forgings and Billets

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.
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Designation:A372/A372M −20
Standard Specification for
Carbon and Alloy Steel Forgings for Thin-Walled Pressure
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Vessels
This standard is issued under the fixed designationA372/A372M; 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.
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ε NOTE—Corrections were made in Table 2 and 6.6.1 editorially in August 2020.
1. Scope* each system are not necessarily exact equivalents; therefore, to
2 ensure conformance with the standard, each system shall be
1.1 This specification covers relatively thin-walled forg-
used independently of the other, and values from the two
ings (including gas bottles) for pressure vessel use.Three types
systems shall not be combined.
of carbon steel and six types of alloy steel are included.
Provision is made for integrally forging the ends of vessel 1.3 Unless the order specifies the applicable “M” specifica-
bodies made from seamless pipe or tubing. tion designation (SI units), the material shall be furnished to
inch-pound units.
NOTE 1—When working to the chemical and tensile requirements of
this specification, the influence of wall thickness and cooling rate will 1.4 This international standard was developed in accor-
necessarily eliminate certain forging sizes in each class.
dance with internationally recognized principles on standard-
NOTE 2—Designations have been changed as follows:
ization established in the Decision on Principles for the
Current Formerly
Development of International Standards, Guides and Recom-
Grade A Type I
mendations issued by the World Trade Organization Technical
Grade B Type II
Grade C Type III
Barriers to Trade (TBT) Committee.
Grade D Type IV
Grade E Class 55 Type V Grade 1 Class 55
2. Referenced Documents
Grade E Class 65 Type V Grade 1 Class 65
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Grade E Class 70 Type V Grade 1 Class 70
2.1 ASTM Standards:
Grade F Class 55 Type V Grade 2 Class 55
A275/A275M Practice for Magnetic Particle Examination of
Grade F Class 65 Type V Grade 2 Class 65
Grade F Class 70 Type V Grade 2 Class 70
Steel Forgings
Grade G Class 55 Type V Grade 3 Class 55
A370 Test Methods and Definitions for Mechanical Testing
Grade G Class 65 Type V Grade 3 Class 65
of Steel Products
Grade G Class 70 Type V Grade 3 Class 70
Grade H Class 55 Type V Grade 4 Class 55 A388/A388M Practice for Ultrasonic Examination of Steel
Grade H Class 65 Type V Grade 4 Class 65
Forgings
Grade H Class 70 Type V Grade 4 Class 70
A530/A530M Specification for General Requirements for
Grade J Class 55 Type V Grade 5 Class 55
Grade J Class 65 Type V Grade 5 Class 65
Specialized Carbon and Alloy Steel Pipe
Grade J Class 70 Type V Grade 5 Class 70
A788/A788M Specification for Steel Forgings, General Re-
Grade K Type VI
quirements
Grade L Type VII
Grade J Class 110 Type VIII
E112 Test Methods for Determining Average Grain Size
Grade M Class 85 Type IX Class A
E165/E165M Practice for Liquid Penetrant Testing for Gen-
Grade M Class 100 Type IX Class B
eral Industry
1.2 The values stated in either SI units or inch-pound units
E290 Test Methods for Bend Testing of Material for Ductil-
are to be regarded separately as standard. The values stated in
ity
E433 Reference Photographs for Liquid Penetrant Inspec-
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This specification is under the jurisdiction of ASTM Committee A01 on Steel,
tion
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
A01.06 on Steel Forgings and Billets.
Current edition approved March 1, 2020. Published March 2020. Originally
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published in 1953. Last previous edition approved in 2016 as A372/A372M–16. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
DOI: 10.1520/A0372_A0372M-20E01. contact ASTM Customer Service at [e-mail]. 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-372/SA-372M in Section II of that code. 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
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A372/A372M−20
2.2 ASME Standard: 4.3.3.2 If an attachment is welded onto a previously
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ASME Boiler and Pressure Vessel Code quenched and tempered pressure vessel, the post-weld heat
treatment temperature of a weldment shall not exceed the prior
3. Ordering Information and
...