1、Designation:A769/A769M17Standard Specification forCarbon and High-Strength Electric Resistance Forge-Welded Steel Structural Shapes1This standard is issued under the fixed designation A769/A769M;the number immediately following the designation indicates the yearof original adoption or,in the case of
2、 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 carbon and high-strength steelshapes of structural quality manufactured b
3、y the electric-resistance forge-welding process from coils.1.2 The size range covered is described in nominal dimen-sions for columns,beams,and tees.Size Range,in.(mm)Web thickness0.060 to 0.500 1.5 to 12.7Flange thickness0.060 to 0.500 1.5 to 12.7Overall depth2.00 to 24.00 50 to 600Flange width0.50
4、 to 12.00 12.7 to 3001.3 These shapes are intended for two classes of application:1.3.1 Class 1General structural use where static loadingpredominates.1.3.2 Class 2Structural use where fatigue loading occursand is a principal design consideration.NOTE1CautionBecause of the absence of smooth,integral
5、,largeradius fillets at the junctions of the webs and the flanges(see Fig.1),fatigue limits of resistance forge-welded shapes in torsion,lateral loading,and flexure are usually lower than those for hot-rolled shapes of similarsize and material.Users should consult shape manufacturers for recom-mende
6、d values of fatigue limits for each specific use,material,and size incases where dynamic loading is a principal design consideration.1.4 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 X
7、3 of Specifica-tion A6/A6M for information on weldability.1.5 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues f
8、rom the two systems may result in non-conformancewith the standard.1.6 The following safety hazards caveat pertains only to thetest methods portion,Section 10,of this specification:Thisstandard does not purport to address all of the safety concerns,if any,associated with its use.It is the responsibi
9、lity of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.1.7 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the
10、Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2A6/A6M Specification for General Requirements for RolledStructural Steel Bars,Pla
11、tes,Shapes,and Sheet PilingA370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA568/A568M Specification for Steel,Sheet,Carbon,Structural,and High-Strength,Low-Alloy,Hot-Rolled andCold-Rolled,General Requirements forA635/A635M Specification for Steel,Sheet and Strip,Heavy-Thickn
12、ess Coils,Hot-Rolled,Alloy,Carbon,Structural,High-Strength Low-Alloy,and High-StrengthLow-Alloy with Improved Formability,General Require-ments forA700 Guide for Packaging,Marking,and Loading Methodsfor Steel Products for Shipment2.2 American Welding Society Standard:AWS Specification D 1.1 Structur
13、al Welding Code33.Ordering Information3.1 Orders for material under this specification shouldinclude the following,as required,to describe the desiredmaterial adequately:3.1.1 Quantity(total number of feet(metres)or lengths),1This specification is under the jurisdiction of ASTM Committee A01 on Stee
14、l,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 June 1,2017.Published June 2017.Originallyapproved in 1979.Last previous edition approved in 2010 as A769/A769M 05(20
15、10).DOI:10.1520/A0769_A0769M-17.2For 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.3Available from American Welding S
16、ociety(AWS),8669 NW 36 St.,#130,Miami,FL 33166-6672,http:/www.aws.org.*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 StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trad