ASTM A508/A508M-16
(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 specification2 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 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.
1.4 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:
Current
Formerly
Grade 1
Class 1
Grade 1A
Class 1A
Grade 2 Class 1
Class 2
Grade 2 Class 2
Class 2A
Grade 3 Class 1
Class 3
Grade 3 Class 2
Class 3A
Grade 4N Class 1
Class 4
Grade 4N Class 2
Class 4A
Grade 4N Class 3
Class 4B
Grade 5 Class 1
Class 5
Grade 5 Class 2
Class 5A
Grade 22 Class 3
Class 22B
Grade 22 Classes 4, 5, 6, and 7
Grade 3V
Class 3V
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:A508/A508M −16
Standard Specification for
Quenched and Tempered Vacuum-Treated Carbon and Alloy
1
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 U.S. Department of Defense.
1. Scope*
Grade 5 Class 2 Class 5A
Grade 22 Class 3 Class 22B
2
1.1 This specification covers quenched and tempered
Grade 22 Classes 4, 5, 6, and 7
vacuum-treated carbon and alloy steel forgings for pressure Grade 3V Class 3V
vessels such as those used in reactor systems. Specifically, it
1.5 This standard does not purport to address all of the
covers forgings for vessel closures, shells, flanges, tube sheets,
safety concerns, if any, associated with its use. It is the
rings, heads, and similar parts.
responsibility of the user of this standard to establish appro-
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
3
2.1 ASTM Standards:
used.
A275/A275M Practice for Magnetic Particle Examination of
1.3 The values stated in either SI units or inch-pound units
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 of
pound units.
Steel Forgings Using Alternating Current
E208 Test Method for Conducting Drop-Weight Test to
NOTE 1—Grades 1 and 1A are composed of different chemistries but
Determine Nil-Ductility Transition Temperature of Fer-
have the same mechanical requirements.
NOTE 2—Designations have been changed as follows: ritic Steels
E428 Practice for Fabrication and Control of Metal, Other
Current Formerly
Grade 1 Class 1
than Aluminum, Reference Blocks Used in Ultrasonic
Grade 1A Class 1A
Testing
Grade 2 Class 1 Class 2
2.2 American Society of Mechanical Engineers Standard:
Grade 2 Class 2 Class 2A
Grade 3 Class 1 Class 3
Boiler and Pressure Vessel Code—Section III, Articles
Grade 3 Class 2 Class 3A
NB 2300, NC 2300, ND 2300, NE 2300, NF 2300, NG
Grade 4N Class 1 Class 4
4
Grade 4N Class 2 Class 4A 2300
Grade 4N Class 3 Class 4B
Grade 5 Class 1 Class 5
3. Terminology
3.1 Definitions:
1
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
3
Stainless Steel and Related Alloys 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 May 1, 2016. Published May 2016. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1964. Last previous edition approved in 2014 as A508/A508M – 14. the ASTM website.
4
DOI: 10.1520/A0508_A0508M-16. Available from American Society of Mechanical Engineers (ASME), ASME
2
For ASME Boiler and Pressure Vessel Code applications see related Specifi- International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
cation SA-508/SA-508M in Section II of that Code. www.asme.org.
*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
1
---------------------- Page: 1 ----------------------
A508/A508M−16
3.1.1 controlling cross section thickness (T )—the diameter 5.1.1 The steel shall be made by the basic electric-furnace
C
of the largest theoretical sphere which can be inscribed within process except when secondary ladle refining or the remelting
the volume of the forging. process is employed, in which case the melting processes of
Specification A788/A788M are permitted.
5.1.2 The molten steel shall be vacuum treated in accor-
4. Ordering Info
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: A508/A508M − 14 A508/A508M − 16
Standard Specification for
Quenched and Tempered Vacuum-Treated Carbon and Alloy
1
Steel Forgings for Pressure Vessels
This standard is issued under the fixed designation A508/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 U.S. Department of Defense.
1. Scope*
2
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 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.
1.4 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:
Current Formerly
Grade 1 Class 1
Grade 1A Class 1A
Grade 2 Class 1 Class 2
Grade 2 Class 2 Class 2A
Grade 3 Class 1 Class 3
Grade 3 Class 2 Class 3A
Grade 4N Class 1 Class 4
Grade 4N Class 2 Class 4A
Grade 4N Class 3 Class 4B
Grade 5 Class 1 Class 5
Grade 5 Class 2 Class 5A
Grade 22 Class 3 Class 22B
Grade 22 Classes 4, 5, 6, and 7
Grade 3V Class 3V
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
3
2.1 ASTM Standards:
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
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.06
on Steel Forgings and Billets.
Current edition approved May 1, 2014May 1, 2016. Published May 2014May 2016. Originally approved in 1964. Last previous edition approved in 20102014 as
A508/A508M – 05b (2010).A508/A508M – 14. DOI: 10.1520/A0508_A0508M-14.10.1520/A0508_A0508M-16.
2
For ASME Boiler and Pressure Vessel Code applications see related Specification SA-508/SA-508M in Section II of that Code.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on 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
1
---------------------- Page: 1 ----------------------
A508/A508M − 16
A788/A788M Specification for Steel Forgings, General Requirements
A966/A966M Practice for Magnetic Particle Examination of Steel Forgings Using Alternating Current
E208 Test Method for Conducting Drop-Weight Test to Determine Nil-Ductility Transition Temperature of Ferritic Steels
E428 Practice for Fabrication and Control of Metal, Other than Aluminum, Reference Blocks Used in Ultrasonic Testing
2.2 American Society of Mechanical Engineers Standard:
4
Boiler and Pressure Vessel Code—Section III, Articles NB 2300, NC 2300, ND 2300, NE 2300, NF 2300, NG 2300
3. Terminology
3.1 Definitions:
3.1.1 controlling cross section thickness (T )—the diameter of the largest theoretical sphere which can be inscribed within the
C
volume of the forging.
4. Ordering Information
4.1 Purchase Order—In addition to the ordering information requi
...
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