ASTM A765/A765M-04
(Specification)Standard Specification for Carbon Steel and Low-Alloy Steel Pressure-Vessel-Component Forgings with Mandatory Toughness Requirements
Standard Specification for Carbon Steel and Low-Alloy Steel Pressure-Vessel-Component Forgings with Mandatory Toughness Requirements
SCOPE
1.1 This specification covers heat-treated carbon steel and alloy steel forgings with mandatory toughness requirements. These forgings are intended for pressure vessels, feedwater heaters, and similar uses.
1.2 These forgings include tube sheets, covers, channel barrels, integral forged channels, rings, nozzles, flanges, and similar parts.
1.3 All grades are considered weldable under proper conditions.
1.4 The maximum thickness of forgings produced to this specification is limited only by the capacity of the selected grade to respond to any heat treatment specified and to meet the specified mechanical tests, including impact tests at the specified temperature.
1.5 Material supplied to this specification shall conform to the requirements of Specification A 788, which outlines additional ordering information, manufacturing requirements, testing and retesting methods and procedures, marking, certification, product analysis variations, and additional supplementary requirements.
1.6 If the requirements of this specification are in conflict with the requirements of Specification A 788, the requirements of this specification shall prevail.
1.7 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.
1.8 Unless the order specifies the applicable "M" specification designation, the material shall be furnished to the inch-pound units.
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Designation: A 765/A 765M – 04
Standard Specification for
Carbon Steel and Low-Alloy Steel Pressure-Vessel-
Component Forgings with Mandatory Toughness
1
Requirements
This standard is issued under the fixed designationA 765/A 765M; 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.
1. Scope* 1.8 Unless the order specifies the applicable “M” specifica-
2 tion designation, the material shall be furnished to the inch-
1.1 This specification covers heat-treated carbon steel and
pound units.
alloy steel forgings with mandatory toughness requirements.
These forgings are intended for pressure vessels, feedwater
2. Referenced Documents
heaters, and similar uses.
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2.1 ASTM Standards:
1.2 These forgings include tube sheets, covers, channel
A 275/A 275M Test Method for Magnetic Particle Exami-
barrels, integral forged channels, rings, nozzles, flanges, and
nation of Steel Forgings
similar parts.
A 370 Test Methods and Definitions for MechanicalTesting
1.3 All grades are considered weldable under proper condi-
of Steel Products
tions.
A 388/A 388M Practice for Ultrasonic Examination of
1.4 The maximum thickness of forgings produced to this
Heavy Steel Forgings
specification is limited only by the capacity of the selected
A 788 Specification for Steel Forgings, General Require-
gradetorespondtoanyheattreatmentspecifiedandtomeetthe
ments
specified mechanical tests, including impact tests at the speci-
E 112 Test Methods for Determining Average Grain Size
fied temperature.
E 165 Test Method for Liquid Penetrant Examination
1.5 Material supplied to this specification shall conform to
2.2 ASME Standards:
the requirements of Specification A 788, which outlines addi-
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Boiler and Pressure Vessel Code
tional ordering information, manufacturing requirements, test-
ing and retesting methods and procedures, marking, certifica-
3. Ordering Information
tion, product analysis variations, and additional supplementary
3.1 In addition to the ordering information requirements of
requirements.
SpecificationA 788, a detailed sketch or written description of
1.6 If the requirements of this specification are in conflict
the forging and the method of selecting the test location (see
with the requirements of SpecificationA 788, the requirements
6.2)shouldbesuppliedtotheproducer,whenappropriateareas
of this specification shall prevail.
of significant in-service loading of the forging need to be
1.7 The values stated in either inch-pound units or SI
designated.
[metric] units are to be regarded separately as the standard;
3.2 The required impact test temperature should be supplied
within the text and tables, the SI units are shown in brackets.
if different than the temperature listed inTable 3, otherwise the
The values stated in each system are not exact equivalents;
impacttestshallbeconductedatthetemperaturelistedinTable
therefore,eachsystemmustbeusedindependentlyoftheother.
3 for the chosen Grade.
Combining values from the two systems may result in noncon-
3.3 IfahubbedtubesheetistobesuppliedforASMEBoiler
formance with the specification.
and Pressure Code Application Supplementary Requirement
S12 of Specification A 788 shall be specified.
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This specification is under the jurisdiction of ASTM Committee A01 on Steel,
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Stainless Steel, and RelatedAlloys 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 July 1, 2004. Published August 2004. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1979. Last previous edition approved in 2001 as A 765/A 765M–01. the ASTM website.
2 4
For ASME Boiler and Pressure Vessel Code applications see related Specifi- Available from American Society of Mechanical Engineers, 345 E. 47th St.,
cation SA–765/SA–765M in Section II of that code. New York, NY 10017.
*ASummary 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 765/A 765M – 04
TABLE 1 Chemical Requirements
the midthickness or the center of the cross section and with the
Composition, % midlength of the specimen at least 2 in. [50 mm] from any
second surface.
Grade I Grade II Grade III Grade IV Grade V
6.2.2 Method 2—Grade I and Grade II forgings with thick-
Carbon, max 0.30 0.30 0.20 0.20 0.30
Manganese 0.60 to 0.60 to 0.90 max 1.00–1.60 0
...
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