ASTM A266/A266M-03a

Standard Specification for Carbon Steel Forgings for Pressure Vessel Components

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:CurrentFormerlyGrade 1Class 1Grade 2Class 2Grade 3Class 3Grade 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 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.
1.4 Unless the order specifies the applicable "M" specification designation, the material shall be furnished to the inch-pound units.

General Information

• Status: Historical
• Publication Date: 09-Sep-2003
• ICS: 77.140.30 - Steels for pressure purposes
• ICS: 77.140.85 - Iron and steel forgings
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.06 - Steel Forgings and Billets

Relations

• Replaces: ASTM A266/A266M-03 - Standard Specification for Carbon Steel Forgings for Pressure Vessel Components
• Effective Date: 10-Sep-2003
• Replaced By: ASTM A266/A266M-03a(2008) - Standard Specification for Carbon Steel Forgings for Pressure Vessel Components
• Effective Date: 01-Mar-2008
• Referred By: ASTM A181/A181M-23 - Standard Specification for Carbon Steel Forgings, for General-Purpose Piping
• Effective Date: 10-Sep-2003
• Referred By: ASTM A105/A105M-23 - Standard Specification for Carbon Steel Forgings for Piping Applications
• Effective Date: 10-Sep-2003
• Referred By: ASTM A788/A788M-23 - Standard Specification for Steel Forgings, General Requirements
• Effective Date: 10-Sep-2003

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: A 266/A 266M – 03a
Standard Specification for
1
Carbon Steel Forgings for Pressure Vessel Components
This standard is issued under the fixed designationA 266/A 266M; 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* E 112 Test Methods for Determining the Average Grain
2 Size
1.1 This specification covers four grades of carbon steel
E 165 Test Method for Liquid Penetrant Examination
forgings for boilers, pressure vessels, and associated equip-
E 381 Method of Macroetch Testing Steel Bars, Billets,
ment.
Blooms, and Forgings
NOTE 1—Designations have been changed as follows:
Current Formerly
2.2 Other Standard:
Grade 1 Class 1
ASME Boiler and Pressure Vessel Code, Section IX, Weld-
Grade 2 Class 2
4
Grade 3 Class 3 ing Qualifications
Grade 4 Class 4
3. Ordering Information and General Requirements
1.2 Supplementary requirements are provided for use when
additional testing or inspection is desired. These shall apply
3.1 In addition to the ordering information required by
only when specified individually by the purchaser in the order. Specification A 788, the purchaser shall include with the
1.3 The values stated in either inch-pound units or SI
inquiry and order a detailed drawing, sketch, or written
(metric) units are to be regarded separately as the standard. description of the forging.
Within the text and tables, the SI units are shown in brackets.
3.2 Material supplied to this specification shall conform to
The values stated in each system are not exact equivalents; the requirements of Specification A 788, which outlines addi-
therefore,eachsystemmustbeusedindependentlyoftheother.
tional ordering information, manufacturing requirements, test-
Combining values from the two systems may result in noncon- ing and retesting methods and procedures, marking, certifica-
formance with the specification.
tion, product analysis variations, and additional supplementary
1.4 Unless the order specifies the applicable “M” specifica- 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 SpecificationA 788, 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
A 275/A 275M Test Method for Magnetic Particle Exami-
Requirement S12 of Specification A 788 shall be specified in
nation of Steel Forgings
addition to Supplementary Requirement S8 of this specifica-
A 370 Test Methods and Definitions for MechanicalTesting
tion.
of Steel Products
4. Materials and Manufacture
A 788 Specification for Steel Forgings, General Require-
ments
4.1 The steel shall be made in accordance with the Melting
Process Section of Specification A 788. A sufficient discard
shall be made to secure freedom from injurious pipe and undue
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
segregation.
Stainless Steel, and RelatedAlloys 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 Sept. 10, 2003. Published October 2003. Originally specified shape and size.
approved in 1943. Last previous edition approved in 2003 as A 266/A 266M–03.
4.3 The finished product shall be a hot-worked forging as
2
For ASME Boiler and Pressure Vessel Code applications, see related Specifi-
defined by Specification A 788.
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 [e-mail]. 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.
*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 266/A 266M – 03a
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 Machin
...