ASTM A508/A508M-05
(Specification)Standard Specification for Quenched and Tempered Vacuum-Treated Carbon and Alloy Steel Forgings for Pressure Vessels
Standard Specification for Quenched and Tempered Vacuum-Treated Carbon and Alloy Steel Forgings for Pressure Vessels
SCOPE
1.1 This specification covers quenched and tempered vacuum treated carbon and alloy steel forgings for pressure vessels such as those used in reactor systems. Specifically, it covers forgings for vessel closures, shells, flanges, tube sheets, rings, heads, and similar parts.
1.2 All grades are considered weldable under proper conditions. Welding technique is of fundamental importance, and it is presupposed that welding procedure and inspection will be in accordance with approved methods for the grade of material used.
1.3 The values stated in either inch-pound units or SI (metric) units are to be regarded separately as standards. Within the text and the tables, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independent of the other. Combining values from the two systems may result in nonconformance with the specification.
1.4 Unless the order specifies the applicable "M" specification designation, the material shall be furnished to the inch-pound units.
Note 1—Grades 1 and 1A are composed of different chemistries but have the same mechanical requirements.
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Standards Content (Sample)
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Designation: A 508/A 508M – 05
Standard Specification for
Quenched and Tempered Vacuum-Treated Carbon and Alloy
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Steel Forgings for Pressure Vessels
This standard is issued under the fixed designationA508/A508M; 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.
1. Scope*
Grade 22 Class 3 Class 22B
Grade 22 Classes 4, 5, 6, and
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1.1 This specification covers quenched and tempered
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vacuum treated carbon and alloy steel forgings for pressure
Grade 3V Class 3V
vessels such as those used in reactor systems. Specifically, it
2. Referenced Documents
covers forgings for vessel closures, shells, flanges, tube sheets,
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2.1 ASTM Standards:
rings, heads, and similar parts.
A 275/A 275M Test Method for Magnetic Particle Exami-
1.2 All grades are considered weldable under proper condi-
nation of Steel Forgings
tions. Welding technique is of fundamental importance, and it
A 370 Test Methods and Definitions for MechanicalTesting
ispresupposedthatweldingprocedureandinspectionwillbein
of Steel Products
accordance with approved methods for the grade of material
A 388/A 388M Practice for Ultrasonic Examination of
used.
Heavy Steel Forgings
1.3 The values stated in either inch-pound units or SI
A 788 Specification for Steel Forgings, General Require-
(metric) units are to be regarded separately as standards.
ments
Within the text and the tables, the SI units are shown in
E 208 Test Method for Conducting Drop-Weight Test to
brackets. The values stated in each system are not exact
Determine Nil-Ductility Transition Temperature of Ferritic
equivalents; therefore, each system must be used independent
Steels
of the other. Combining values from the two systems may
E 428 Practice for Fabrication and Control of Steel Refer-
result in nonconformance with the specification.
ence Blocks Used in Ultrasonic Inspection
1.4 Unless the order specifies the applicable “M” specifica-
2.2 American Society of Mechanical Engineers Standard:
tion designation, the material shall be furnished to the inch-
Boiler and Pressure Vessel Code—Section III, Articles
pound units.
NB 2300, NC 2300, ND 2300, NE 2300, NF 2300, NG
NOTE 1—Grades 1 and 1A are composed of different chemistries but
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2300
have the same mechanical requirements.
NOTE 2—Designations have been changed as follows:
3. Ordering Information
Current Formerly
3.1 Purchase Order—In addition to the ordering informa-
Grade 1 Class 1
Grade 1A Class 1A
tion required by Specification A 788, the purchaser shall
Grade 2 Class 1 Class 2
include with the inquiry and order a detailed drawing that
Grade 2 Class 2 Class 2A
locates the areas of significant loading in the forging (when
Grade 3 Class 1 Class 3
Grade 3 Class 2 Class 3A
required), the method of selecting test locations (see 6.1.5 and
Grade 4N Class 1 Class 4
6.1.6), and purchase options (see 4.2.2, 6.2.1, and 10.1) and
Grade 4N Class 2 Class 4A
any supplementary requirements desired.
Grade 4N Class 3 Class 4B
Grade 5 Class 1 Class 5
3.2 Forging Drawing—Each forging shall be manufactured
Grade 5 Class 2 Class 5A
in accordance with a purchaser-approved drawing showing the
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This specification is under the jurisdiction of ASTM Committee A01 on Steel,
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Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee For referenced ASTM standards, visit the ASTM website, www.astm.org, or
A01.06 on Steel Forgings and Billets. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved January 1, 2005. Published January 2005. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1964. Last previous edition approved in 2004 asA 508/A 508M – 04b. the ASTM website.
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For ASME Boiler and Pressure Vessel Code applications see related Specifi- Available from American Society of Mechanical Engineers, 345 E. 47th St.,
cation SA-508/SA-508M in Section II of that Code. New York, NY 10017.
*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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A 508/A 508M – 05
prequenched dimensions, the finished dimensions, the surfaces austenitic structure and then quenched in a suitable liquid
that will be subjected to significant loading, and the locations medium by spraying or immersion. For Grade 4N, Classes 1
of mechanical test specimens. and 3, the austenitizing temperature shall be 1540°F [840°C]
3.3
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