1、Designation:A996/A996M16Standard Specification forRail-Steel and Axle-Steel Deformed Bars for ConcreteReinforcement1This standard is issued under the fixed designation A996/A996M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the ye
2、ar 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 rail-steel and axle-steel barsfor concrete reinforcement.Three types of product areinclud
3、ed,designated with a“rail symbol,”and an“R”for barsmade of rail-steel and with an“A”for bars made of axle-steel.The standard sizes and dimensions of deformed bars and theirnumber designations are given in Table 1.All sizes and gradesof all types may not be readily available;manufacturers shouldbe co
4、nsulted to verify availability.1.2 The text of this specification references notes andfootnotes that provide explanatory material.These notes andfootnotes,excluding those in tables and figures,shall not beconsidered as requirements of the specification.1.3 Type“rail symbol”and Type R are of two mini
5、mumyield strength levels,namely 50 000 psi 350 MPa and 60 000psi 420 MPa designated as Grade 50 350 and Grade 60420,respectively.Type A is of two minimum yield levels,namely 40 000 psi 280 MPa and 60 000 psi 420 MPadesignated as Grade 40 280 and Grade 60 420,respectively.1.4 The weldability of the s
6、teel is not a requirement of thisspecification.1.5 This specification is applicable for orders in eitherinch-pound units(Specification A996)or SI units(Specifica-tion A996M).1.6 The values stated in either inch-pound units or SI unitsare to be regarded as standard.Within the text,the SI units aresho
7、wn in brackets.The values stated must be used indepen-dently of the other.Combining values from the two systemsmay result in nonconformance with the specification.1.7 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the use
8、r of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2A370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA700 Guide for Packaging,Marking,and Loa
9、ding Methodsfor Steel Products for ShipmentA751 Test Methods,Practices,and Terminology for Chemi-cal Analysis of Steel ProductsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE290 Test Methods for Bend Testing of Material for Ductil-ity2.2 Military S
10、tandard:3MIL-STD-129 Marking for Shipment and Storage2.3 Federal Standard:3Fed.Std.No.123 Marking for Shipment(Civil Agencies)3.Terminology3.1 Definitions of Terms Specific to This Specification:3.1.1 deformations,ntransverse protrusions on a de-formed bar.3.1.2 deformed bar,nsteel bar with transver
11、se protrusions;a bar that is intended for use as reinforcement in reinforcedconcrete construction.3.1.2.1 DiscussionThe surface of the bar is provided withprotrusions that inhibit longitudinal movement of the barrelative to the concrete surrounding the bar in such construc-tion.The protrusions confo
12、rm to the provisions of this speci-fication.3.1.3 rib,nlongitudinal protrusion on a deformed bar.4.Ordering Information4.1 Orders for rail-steel or axle-steel reinforcing bars underthis specification shall contain the following information:1This specification is under the jurisdiction of ASTM Commit
13、tee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.05 on Steel Reinforcement.Current edition approved Jan.15,2016.Published March 2016.Originallyapproved in 1998.Last previous edition approved in 2015 as A996/A996M 15.DOI:10.1520/A0996_A0996M-16.2
14、For 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 Standardization Documents Order Desk,DODSSP,Bldg.4,
15、SectionD,700RobbinsAve.,Philadelphia,PA19111-5098,http:/www.dodssp.daps.mil.*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 States1 4.1.1 Quantity(weight)mass,4.1.2 Type“rail symbol
16、”or Type R for rail steel,or Type Afor axle steel,4.1.3 Bar designation number(size),4.1.4 Grade(see Table 2),4.1.5 Requirements for inspection(16.1),4.1.6 Packaging(see Section 20),and4.1.7 ASTM designation and year of issue.4.2 The purchaser shall have the option to specify additionalrequirements,including but not limited to,the following:4.2.1 Carbon range for each lot of bars(6.2),and4.2.2 Other special requirements,if any.5.Materials and Manufacture5.1 The bars shall be rolled from standard