ASTM A508/A508M-04
(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.
Note 2—Designations have been changed as follows:CurrentFormerlyGrade 1Class 1Grade 1AClass 1AGrade 2 Class 1Class 2Grade 2 Class 2Class 2AGrade 3 Class 1Class 3Grade 3 Class 2Class 3AGrade 4N Class 1Class 4Grade 4N Class 2Class 4AGrade 4N Class 3Class 4BGrade 5 Class 1Class 5Grade 5 Class 2Class 5AGrade 22 Class 3Class 22BGrade 3VClass 3VGrade 6 Classes 1, 2, 3, and 4N/A
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Standards Content (Sample)
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Designation: A 508/A 508M – 04
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 designation A 508/A 508M; 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.
Note—Grades 1–3 were added editorially to the entry for Silicon in Table 1 and the year date changed on Feb. 10, 2004.
1. Scope*
Grade 5 Class 1 Class 5
Grade 5 Class 2 Class 5A
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1.1 This specification covers quenched and tempered
Grade 22 Class 3 Class 22B
vacuum treated carbon and alloy steel forgings for pressure Grade 3V Class 3V
Grade 6 Classes 1, 2, 3, and N/A
vessels such as those used in reactor systems. Specifically, it
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covers forgings for vessel closures, shells, flanges, tube sheets,
rings, heads, and similar parts.
2. Referenced Documents
1.2 All grades are considered weldable under proper condi- 3
2.1 ASTM Standards:
tions. Welding technique is of fundamental importance, and it
A 275/A 275M Test Method for Magnetic Particle Exami-
is presupposed that welding procedure and inspection will be in
nation of Steel Forgings
accordance with approved methods for the grade of material
A 370 Test Methods and Definitions for Mechanical Testing
used.
of Steel Products
1.3 The values stated in either inch-pound units or SI
A 388/A 388M Practice for Ultrasonic Examination of
(metric) units are to be regarded separately as standards.
Heavy Steel Forgings
Within the text and the tables, the SI units are shown in
A 788 Specification for Steel Forgings, General Require-
brackets. The values stated in each system are not exact
ments
equivalents; therefore, each system must be used independent
E 208 Test Method for Conducting Drop-Weight Test to
of the other. Combining values from the two systems may
Determine Nil-Ductility Transition Temperature of Ferritic
result in nonconformance with the specification.
Steels
1.4 Unless the order specifies the applicable “M” specifica-
E 428 Practice for Fabrication and Control of Steel Refer-
tion designation, the material shall be furnished to the inch-
ence Blocks Used in Ultrasonic Inspection
pound units.
2.2 American Society of Mechanical Engineers Standard:
Boiler and Pressure Vessel Code—Section III, Articles
NOTE 1—Grades 1 and 1A are composed of different chemistries but
have the same mechanical requirements. NB 2300, NC 2300, ND 2300, NE 2300, NF 2300, NG
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NOTE 2—Designations have been changed as follows:
2300
Current Formerly
Grade 1 Class 1
3. Ordering Information
Grade 1A Class 1A
3.1 Purchase Order—In addition to the ordering informa-
Grade 2 Class 1 Class 2
Grade 2 Class 2 Class 2A
tion required by Specification A 788, the purchaser shall
Grade 3 Class 1 Class 3
include with the inquiry and order a detailed drawing that
Grade 3 Class 2 Class 3A
locates the areas of significant loading in the forging (when
Grade 4N Class 1 Class 4
Grade 4N Class 2 Class 4A
required), the method of selecting test locations (see 6.1.5 and
Grade 4N Class 3 Class 4B
6.1.6), and purchase options (see 4.2.2, 6.2.1, and 10.1) and
any supplementary requirements desired.
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This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee
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A01.06 on Steel Forgings and Billets. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved February 10, 2004. Published February 2004. Origi- contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
nally approved in 1964. Last previous edition approved in 2003 as A 508/ Standards volume information, refer to the standard’s Document Summary page on
A 508M – 03a. 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 – 04
3.2 Forging Drawing—Each forging shall be manufactured medium by spraying or immersion. For Grade 4N, Classes 1
in accordance with a purchaser-approved drawing showing the and 3, the austenitizing temperature shall be 1540°F [840°C]
prequenched dimensions, the finished dimensions, the surfaces
min to 1640°F [
...
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