ASTM A266/A266M-03a(2008)
(Specification)Standard Specification for Carbon Steel Forgings for Pressure Vessel Components
Standard Specification for Carbon Steel Forgings for Pressure Vessel Components
ABSTRACT
This specification covers four grades of carbon steel forgings for boiler and pressure vessel components, and associated equipment. Materials shall be manufactured by melting process and hot-worked forging. Heat and product analyses shall be performed wherein forgings shall conform to chemical requirements for carbon, manganese, phosphorus, sulphur, and silicon. Mechanical properties such as tensile strength, yield strength, elongation, and reduction of area shall be inspected as well. The requirements for annealed, normalized, or normalized and tempered steel forgings, and that for quenched and tempered steel forgings have been specified separately.
SCOPE
1.1 This specification covers four grades of carbon steel forgings for boilers, pressure vessels, and associated equipment.
Note 1—Designations have been changed as follows: Current
Formerly
Grade 1Class 1 Grade 2Class 2 Grade 3Class 3 Grade 4Class 4
1.2 Supplementary requirements are provided for use when additional testing or inspection is desired. These shall apply only when specified individually by the purchaser in the order.
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.
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Designation: A266/A266M – 03a (Reapproved 2008)
Standard Specification for
1
Carbon Steel Forgings for Pressure Vessel Components
This standard is issued under the fixed designationA266/A266M; 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 E112 Test Methods for Determining Average Grain Size
2 E165 PracticeforLiquidPenetrantExaminationforGeneral
1.1 This specification covers four grades of carbon steel
Industry
forgings for boilers, pressure vessels, and associated equip-
E381 Method of Macroetch Testing Steel Bars, Billets,
ment.
Blooms, and Forgings
NOTE 1—Designations have been changed as follows:
2.2 Other Standard:
Current Formerly
ASME Boiler and Pressure Vessel Code, Section IX, Weld-
Grade 1 Class 1
4
ing Qualifications
Grade 2 Class 2
Grade 3 Class 3
Grade 4 Class 4 3. Ordering Information and General Requirements
1.2 Supplementary requirements are provided for use when 3.1 In addition to the ordering information required by
additional testing or inspection is desired. These shall apply
Specification A788/A788M, the purchaser shall include with
only when specified individually by the purchaser in the order. the inquiry and order a detailed drawing, sketch, or written
1.3 The values stated in either SI units or inch-pound units
description of the forging.
are to be regarded separately as standard. The values stated in 3.2 Material supplied to this specification shall conform to
each system may not be exact equivalents; therefore, each
the requirements of Specification A788/A788M, which out-
system shall be used independently of the other. Combining lines additional ordering information, manufacturing require-
values from the two systems may result in non-conformance
ments, testing and retesting methods and procedures, marking,
with the standard. certification,productanalysisvariations,andadditionalsupple-
1.4 Unless the order specifies the applicable “M” specifica-
mentary requirements.
tion designation, the material shall be furnished to the inch- 3.3 If the requirements of this specification are in conflict
pound units. with the requirements of Specification A788/A788M, the
requirements of this specification shall prevail.
2. Referenced Documents
3.4 For hubbed flanges and tube sheets ordered for ASME
3
2.1 ASTM Standards:
Boiler and Pressure Vessel Code application, Supplementary
A275/A275M Practice for Magnetic Particle Examination
RequirementS12ofSpecificationA788/A788Mshallbespeci-
of Steel Forgings
fied in addition to Supplementary Requirement S8 of this
A370 Test Methods and Definitions for Mechanical Testing
specification.
of Steel Products
4. Materials and Manufacture
A788/A788M Specification for Steel Forgings, General Re-
quirements 4.1 The steel shall be made in accordance with the Melting
Process Section of Specification A788/A788M. A sufficient
discard shall be made to secure freedom from injurious pipe
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
and undue segregation.
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
4.2 The material shall be forged as close as practical to the
A01.06 on Steel Forgings and Billets.
Current edition approved March 1, 2008. Published April 2008. Originally
specified shape and size.
approved in 1943. Last previous edition approved in 2003 as A266/A266M – 03a.
4.3 The finished product shall be a hot-worked forging as
DOI: 10.1520/A0266_A0266M-03AR08.
2
defined by Specification A788/A788M.
For ASME Boiler and Pressure Vessel Code applications, see related Specifi-
cation SA–266/ SA–266M in Section II of that code.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contactASTM Customer Service at service@astm.org. ForAnnual Book ofASTM
4
Standards volume information, refer to the standard’s Document Summary page on Available from the American Society of Mechanical Engineers, 345 East 47th
the ASTM website. St., New York, NY 10017.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
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A266/A266M – 03a (2008)
TABLE 2 Tensile Requirements
5. Machining
Grade 1 Grades Grade 3
5.1 Surfaces shall be machined as designated by the pur-
2 and 4
chaser. Unmachined surfaces shall be sufficiently free of scale
Tensile strength, min, ksi 60–85 70–95 75–100
to permit inspection.
[MPa] [415–585] [485–655] [515–690]
5.2 Machiningmaybeperformedeitherpriortoorafterheat
Yield strength (0.2 % o
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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:A 266/A 266M–03a Designation: A266/A266M – 03a (Reapproved 2008)
Standard Specification for
1
Carbon Steel Forgings for Pressure Vessel Components
This standard is issued under the fixed designationA266/A266M; 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 *
2
1.1 This specification covers four grades of carbon steel forgings for boilers, pressure vessels, and associated equipment.
NOTE 1—Designations have been changed as follows:
Current Formerly
Grade 1 Class 1
Grade 2 Class 2
Grade 3 Class 3
Grade 4 Class 4
1.2 Supplementary requirements are provided for use when additional testing or inspection is desired. These shall apply only
when specified individually by the purchaser in the order.
1.3The values stated in either inch-pound units or SI (metric) units are to be regarded separately as the standard. Within the text
and tables, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system
must be used independently of the other. Combining values from the two systems may result in nonconformance with the
specification.
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.
2. Referenced Documents
3
2.1 ASTM Standards:
A275/A275M Test MethodPractice for Magnetic Particle Examination of Steel Forgings
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A788788/A788M Specification for Steel Forgings, General Requirements
E112 Test Methods for Determining the Average Grain Size
E165 Test Method for Liquid Penetrant Examination Practice for Liquid Penetrant Examination for General Industry
E381 Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings
2.2 Other Standard:
4
ASME Boiler and Pressure Vessel Code, Section IX, Welding Qualifications
3. Ordering Information and General Requirements
3.1 In addition to the ordering information required by SpecificationA788A788A788/A788M, the purchaser shall include with
the inquiry and order a detailed drawing, sketch, or written description of the forging.
3.2 Material supplied to this specification shall conform to the requirements of SpecificationA788A788A788/A788M, which
outlines additional ordering information, manufacturing requirements, testing and retesting methods and procedures, marking,
certification, product analysis variations, and additional supplementary requirements.
1
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel, Stainless Steel,Steel and RelatedAlloys and is the direct responsibility of Subcommittee
A01.06 on Steel Forgings and Billets.
Current edition approved Sept. 10, 2003. Published October 2003. Originally approved in 1943. Last previous edition approved in 2003 as A 266/A 266M–03.
Current edition approved March 1, 2008. Published April 2008. Originally approved in 1943. Last previous edition approved in 2003 as A266/A266M – 03a. DOI:
10.1520/A0266_A0266M-03AR08.
2
For ASME Boiler and Pressure Vessel Code applications, see related Specification SA–266/ SA–266M in Section II of that code.
3
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.ForAnnualBookofASTMStandards
volume information, refer to the standard’s Document Summary page on the ASTM website.
4
Available from the American Society of Mechanical Engineers, 345 East 47th St., New York, NY 10017.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
A266/A266M – 03a (2008)
3.3 If the requirements of this specification are in conflict with the requirements of SpecificationA788A788A788/A788M, the
requirements of this specification shall prevail.
3.4 For hubbed flanges and tube sheets ordered for ASME Boiler and Pressure Vessel Code applicatio
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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.
An American National Standard Designation: A 266/A 266M – 03a (Reapproved 2008)
Designation:A266/A266M–03
Standard Specification for
1
Carbon Steel Forgings for Pressure Vessel Components
This standard is issued under the fixed designationA266/A266M; 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 *
2
1.1 This specification covers four grades of carbon steel forgings for boilers, pressure vessels, and associated equipment.
NOTE 1—Designations have been changed as follows:
Current Formerly
Grade 1 Class 1
Grade 2 Class 2
Grade 3 Class 3
Grade 4 Class 4
1.2 Supplementary requirements are provided for use when additional testing or inspection is desired. These shall apply only
when specified individually by the purchaser in the order.
1.3The values stated in either inch-pound units or SI (metric) units are to be regarded separately as the standard. Within the text
and tables, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system
must be used independently of the other. Combining values from the two systems may result in nonconformance with the
specification.
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.
2. Referenced Documents
3
2.1 ASTM Standards:
A 275/A 275M Test Method Practice for Magnetic Particle Examination of Steel Forgings
A 370 Test Methods and Definitions for Mechanical Testing of Steel Products
A 788/A 788M Specification for Steel Forgings, General Requirements
E 112 Test Methods for Determining the Average Grain Size
E 165 Test Method for Liquid Penetrant Examination
E 381 Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings
2.2 Other Standard:
4
ASME Boiler and Pressure Vessel Code, Section IX, Welding Qualifications
3. Ordering Information and General Requirements
3.1 InadditiontotheorderinginformationrequiredbySpecificationA 788/A 788M,thepurchasershallincludewiththeinquiry
and order a detailed drawing, sketch, or written description of the forging.
3.2 Material supplied to this specification shall conform to the requirements of Specification A 788/A 788M, which outlines
additional ordering information, manufacturing requirements, testing and retesting methods and procedures, marking, certification,
1
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel, Stainless Steel,Steel and RelatedAlloys and is the direct responsibility of Subcommittee
A01.06 on Steel Forgings and Billets.
Current edition approved April 10, 2003.March 1, 2008. Published June 2003.April 2008. Originally approved in 1943. Last previous edition approved in 19992003 as
A266/A266M–99. A 266/A 266M – 03a.
2
For ASME Boiler and Pressure Vessel Code applications, see related Specification SA–266/ SA–266M in Section II of that code.
3
Annual Book of ASTM Standards, Vol 01.05.
3
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.ForAnnualBookofASTMStandards
volume information, refer to the standard’s Document Summary page on the ASTM website.
4
Annual Book of ASTM Standards, Vol 01.03.
4
Available from the American Society of Mechanical Engineers, 345 East 47th St., 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.
1
---------------------- Page: 1 ----------------------
A 266/A 266M – 03a (2008)
product analysis variations, and additional supplementary requirements.
3.3 If the requirements of this specification are in conflict with the requirements of Specification A 788/A 788M, the
requirements of this specification shall prevail.
3.4 For hubbed flanges and tube sheets ordered for ASME Boiler and Pressure Vessel Code application, Supplementary
Requirement S12 of Specific
...
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