1.1 This specification 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:
|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 may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.3 Unless the order specifies the applicable “M” specification designation (SI units), the material shall be furnished to inch-pound units.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A275/A275M Practice for Magnetic Particle Examination of Steel Forgings
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A388/A388M Practice for Ultrasonic Examination of Steel Forgings
A530/A530M Specification for General Requirements for Specialized Carbon and Alloy Steel Pipe
A788/A788M Specification for Steel Forgings, General Requirements
E112 Test Methods for Determining Average Grain Size
E165 Practice for Liquid Penetrant Examination for General Industry
E290 Test Methods for Bend Testing of Material for Ductility
E433 Reference Photographs for Liquid Penetrant Inspection
alloy steel forgings; carbon steel forgings; gas bottles; pressure vessels; thin wall ;
ICS Number Code 77.140.85 (Iron and steel forgings)
ASTM International is a member of CrossRef.
Citing ASTM Standards
[Back to Top]