ASTM A508/A508M-05b
(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
ABSTRACT
This specification covers quenched and tempered vacuum-treated carbon and alloy steel forgings for pressure vessels, such as those used in reactor systems, specifically, vessel closures, shells, flanges, tube sheets, rings, heads, and similar parts. Steels shall be manufactured by basic electric-furnace process except when secondary ladle refining or remelting process is employed, and shall be vacuum treated prior to or during the pouring of the ingot. Materials shall also go through preliminary heat treatment and quenching for mechanical properties. Heat and product analyses shall be executed to evaluate the conformance of the forgings with specified chemical requirements. Tension and Charpy impact tests shall also be performed to examine the conformance of steel specimens with the following mechanical properties: tensile strength, yield strength, elongation, and reduction of area. Nondestructive inspection procedures, such as magnetic particle examination, and longitudinal wave and angle beam ultrasonic examination, shall also be carried out. Repair welding may be permitted at the option of the purchaser.
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.
General Information
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Standards Content (Sample)
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Designation: A508/A508M – 05b
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 (´) 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 Classes 4, 5, 6, and
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1.1 This specification covers quenched and tempered
Grade 3V Class 3V
vacuum-treated carbon and alloy steel forgings for pressure
1.5 This standard does not purport to address all of the
vessels such as those used in reactor systems. Specifically, it
safety concerns, if any, associated with its use. It is the
covers forgings for vessel closures, shells, flanges, tube sheets,
responsibility of the user of this standard to establish appro-
rings, heads, and similar parts.
priate safety and health practices and determine the applica-
1.2 All grades are considered weldable under proper condi-
bility of regulatory limitations prior to use.
tions. Welding technique is of fundamental importance, and it
ispresupposedthatweldingprocedureandinspectionwillbein
2. Referenced Documents
accordance with approved methods for the grade of material
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2.1 ASTM Standards:
used.
A275/A275M Practice for Magnetic Particle Examination
1.3 The values stated in either SI units or inch-pound units
of Steel Forgings
are to be regarded separately as standard. The values stated in
A370 Test Methods and Definitions for Mechanical Testing
each system may not be exact equivalents; therefore, each
of Steel Products
system shall be used independently of the other. Combining
A388/A388M Practice for Ultrasonic Examination of Steel
values from the two systems may result in non-conformance
Forgings
with the standard.
A788/A788M Specification for Steel Forgings, General Re-
1.4 Unless the order specifies the applicable “M” specifica-
quirements
tion designation, the material shall be furnished to the inch-
A966/A966M Practice for Magnetic Particle Examination
pound units.
of Steel Forgings Using Alternating Current
NOTE 1—Grades 1 and 1A are composed of different chemistries but
E208 Test Method for Conducting Drop-Weight Test to
have the same mechanical requirements.
Determine Nil-Ductility Transition Temperature of Ferritic
NOTE 2—Designations have been changed as follows:
Steels
Current Formerly
E428 Practice for Fabrication and Control of Metal, Other
Grade 1 Class 1
than Aluminum, Reference Blocks Used in Ultrasonic
Grade 1A Class 1A
Grade 2 Class 1 Class 2 Testing
Grade 2 Class 2 Class 2A
2.2 American Society of Mechanical Engineers Standard:
Grade 3 Class 1 Class 3
Boiler and Pressure Vessel Code—Section III, Articles
Grade 3 Class 2 Class 3A
Grade 4N Class 1 Class 4
NB 2300, NC 2300, ND 2300, NE 2300, NF 2300, NG
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Grade 4N Class 2 Class 4A
2300
Grade 4N Class 3 Class 4B
Grade 5 Class 1 Class 5
3. Ordering Information
Grade 5 Class 2 Class 5A
Grade 22 Class 3 Class 22B
3.1 Purchase Order—In addition to the ordering informa-
tion required by Specification A788/A788M, the purchaser
shall include with the inquiry and order a detailed drawing that
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This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel, and RelatedAlloys 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 Oct. 1, 2005. Published October 2005. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1964. Last previous edition approved in 2005 as A508/A508M – 05a. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/A0508_A0508M-05B. 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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A508/A508M – 05b
locates the areas of significant loading in the forging (when 4.2 Heat Treatment:
required), the method of selecting test locations (see 6.1.5 and 4.2.1 Preliminary Heat Treatment—After forging and be-
6.1.6), and purchase options (see 4.2.2, 6.2, and 10.1) and any fore reheating, the forgings shall be cooled to provide substan-
s
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