ASTM_A_871_-_A_871M_-_14.pdf

Designation:A871/A871M14Standard Specification forHigh-Strength Low-Alloy Structural Steel Plate WithAtmospheric Corrosion Resistance1This standard is issued under the fixed designation A871/A871M;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.1.Scope*1.1 This specification covers high-strength low-alloy steelplate intended for use in tubular structures and poles or in othersuitable applications.Two grades,60 and 65,may be providedas-rolled,normalized or quenched and tempered as required tomeet the specified mechanical requirements.1.2 The atmospheric corrosion resistance of this steel inmost environments is substantially better than that of carbonstructural steels with or without copper addition(see Note 1).When properly exposed to the atmosphere,this steel can beused bare(unpainted)for many applications.NOTE1For methods of estimating the atmospheric corrosion resis-tance of low-alloy steels,see Guide G101.1.3 When the steel is to be welded,it is presupposed thatwelding procedures 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.1.4 Supplementary requirements in accordance with Speci-fication A6/A6M are available,but shall apply only whenspecified by the purchaser at time of ordering.1.5 The values stated in either inch-pound units or SI unitsare to be regarded as standard.Within the text,the SI units areshown in brackets.The values stated in each system are notexact equivalents;therefore,each system must be used inde-pendently of the other.Combining values from the two systemsmay result in nonconformance with the specification.2.Referenced Documents2.1 ASTM Standards:2A6/A6M Specification for General Requirements for RolledStructural Steel Bars,Plates,Shapes,and Sheet PilingA370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA673/A673M Specification for Sampling Procedure for Im-pact Testing of Structural SteelG101 Guide for Estimating the Atmospheric Corrosion Re-sistance of Low-Alloy Steels3.General Requirements for Delivery3.1 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.4.Materials and Manufacture4.1 The steel shall be made to fine grain practice.5.Heat Treatment5.1 Grade 65 in thicknesses of316to34in.5 to 20 mm andGrade 60 in thicknesses of316to 138in.5 to 35 mm arenormally furnished in the as-rolled condition.The manufac-turer has the option to heat treat this material to meet themechanical requirements of Section 7.Quenched and temperedmaterial shall be heat treated by heating to not less than 1650F900C,holding a sufficient time to attain uniform heatthroughout the material,quenching in a suitable medium,andtempering at not less than 1100F 595C.Heat treatingtemperatures shall be reported on the test certificates.5.2 The maximum thickness of plates is limited only by thecapacity of the composition to meet the specified mechanicalrequirements.The individual manufacturer shall be contactedto determine the actual maximum thickness for each grade andheat treatment method.6.Chemical Requirements6.1 The heat analysis shall conform to the chemical require-ments of Table 1.6.2 The steel shall conform on product analysis to thechemical requirements of Table 1,subject to the productanalysis tolerances in Specification A6/A6M.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 1,2014.Published May 2014.Originallyapproved in 1987.Last previous edition approved in 2012 as A871/A871M 12.DOI:10.1520/A0871_A0871M-14.2For 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);6.3 The atmospheric corrosion-resistance index,calculatedon the basis of the heat analysis for the steel,as described inGuide G101Predictive Method Based on the Data of Larabeeand Coburn,shall be 6.0 or higher.NOTE2The user is cautioned that the Guide G101(Predictive MethodBased on the Data of Larabee and Coburn)for calculation of anatmospheric corrosion-resistance index has only been verified for thecomposition limits st