ASTM_A_710_-_A_710M_-_02_2013.pdf

Designation:A710/A710M02(Reapproved 2013)Standard Specification forPrecipitationStrengthened Low-Carbon Nickel-Copper-Chromium-Molybdenum-Columbium Alloy Structural SteelPlates1This standard is issued under the fixed designation A710/A710M;the number immediately following the designation indicates the yearof 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.Scope1.1 This specification covers low-carbon precipitationstrengthened nickel-copper-chromium-molybdenum-columbium alloy steel plates for general applications.Thealloys in this specification are strengthened by precipitation invarious temperature ranges.Precipitation strengthening canoccur upon air cooling after hot rolling,during normalizing,and by another heat treatment.These grades are not intendedfor use in applications above 900F 540C.1.2 Two grades,each with three classes,are provided asfollows:Grade and ClassConditionGrade A,Class 1as-rolled and precipitation heat treatedGrade A,Class 2normalized and precipitation heat treatedGrade A,Class 3quenched and precipitation heat treatedGrade B,Class 1as-rolledGrade B,Class 2normalizedGrade B,Class 3normalized and precipitation heat treated1.3 Grade A provides minimum yield strength levels rang-ing from 50 to 85 ksi 345 to 585 MPa,depending onthickness and condition.1.4 Grade A,Class 1,plates are limited to a maximumthickness of34in.20 mm.The maximum thickness of GradeA,Classes 2 and 3,is limited only by the capacity of thecomposition to meet the specified mechanical property require-ments;however,current practice normally limits the maximumthickness to 8 in.200 mm.1.5 Mandatory notch toughness requirements are specifiedfor Grade A,Class 1.1.6 Grade B provides minimum yield strength levels rang-ing from 70 to 75 ksi 480 to 515 MPa,depending onthickness and condition.1.7 Grade B plates are limited to a maximum thickness of 2in.50 mm.1.8 Mandatory notch toughness requirements are specifiedfor the three classes of Grade B.1.9 When the steel is to be welded,it is presupposed that awelding procedure suitable for the grade of steel and intendeduse or service will be utilized.See Appendix X3 of Specifica-tion A6/A6M for information on weldability.1.10 The values stated in either inch-pound units or SI unitsare to be regarded separately as standard.Within the text,theSI units are shown in brackets.The values stated in eachsystem are not exact equivalents;therefore,each system mustbe used independently of the other.Combining values from thetwo systems may result in nonconformance with the specifi-cation.2.Referenced Documents2.1 ASTM Standards:2A6/A6M Specification for General Requirements for RolledStructural Steel Bars,Plates,Shapes,and Sheet PilingA673/A673M Specification for Sampling Procedure for Im-pact Testing of Structural Steel3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 precipitation heat treatmenta sub-critical tempera-ture thermal treatment performed to cause precipitation ofsubmicroscopical constituents,etc.,so as to result in enhance-ment of some desirable property.3.1.2 precipitation strengtheningthe precipitation of sub-microscopic and/or microscopic constituents of an alloy atvarious temperatures,which results in the alteration of certainproperties.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.02 on Structural Steel for Bridges,Buildings,Rolling Stock and Ships.Current edition approved May 15,2013.Published June 2013.Originallyapproved in 1974.Last previous edition approved in 2007 as A710/A710M 02(2007).DOI:10.1520/A0710_A0710M-02R13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1Copyright by ASTM Intl(all rights reserved);3.1.3 soakto hold at temperature after the material hasattained the temperature throughout.4.General Requirements for Delivery4.1 Material furnished under this specification shall con-form to the requirements of the current edition of SpecificationA6/A6M,for the ordered material,unless a conflict exists inwhich case this specification shall prevail.5.Materials and Manufacture5.1 The steel shall be made to fine grain practice.6.Heat Treatment6.1 Grade A,Class 1 material shall be precipitation heattreated in the temperature range from 1000 to 1300F 540 to705C for a time to be determined by the material manufac-turer.6.2 Grade A,Clas