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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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
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
A788/A788M Specification for Steel Forgings, General Requirements
E112 Test Methods for Determining Average Grain Size
E165/E165M Practice for Liquid Penetrant Examination for General Industry
ICS Number Code 77.140.30 (Steels for pressure purposes)
UNSPSC Code 31132100(Steel forgings); 11101704(Steel)
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ASTM A765 / A765M-98a, Standard Specification for Carbon Steel and Low-Alloy Steel Pressure-Vessel-Component Forgings with Mandatory Toughness Requirements, ASTM International, West Conshohocken, PA, 2001, www.astm.orgBack to Top