1、Designation:A49915Standard Specification forSteel Bars and Shapes,Carbon Rolled from“T”Rails1This standard is issued under the fixed designation A499;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number
2、in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This specification covers carbon steel bars and shapesproduce
3、d from standard rail steel.These bars are furnished inthe as-wrought condition intended for structural use,or bar andshape uses,where high tensile properties are applicable.Thesematerials are available in four strength levels as Grade 50,Grade 60,Grade 70,and Grade 80.1.2 The values stated in inch-p
4、ound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.2.Referenced Documents2.1 ASTM Standards:2A1 Specification for Carbon Steel Tee RailsA29/A29M Specification for Gener
5、al Requirements for SteelBars,Carbon and Alloy,Hot-WroughtA370 Test Methods and Definitions for Mechanical Testingof Steel Products3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 Rail steel bars and bar size shapes are available in thefollowing sections and nominal sizes:3.1.1.
6、1 Rounds,Squares,and Round Corner Squares insizes ranging from38to 114in.(9.5 to 32 mm).3.1.1.2 Square and Round Edge Flats,58to 5 in.(15.9 to127 mm),inclusive,in width and thickness from764to 1 in.(2.8 to 25 mm),inclusive,within 6 lb/ft(8.8 kg/m)limit.3.1.1.3 Hexagons and Octagons,in sizes12to 1 in
7、.(12.7 to25 mm)in116-in.(1.6-mm)increments.3.1.1.4 Bar Size Shapes:(1)Equal and Unequal Angles,34to 3 in.(19.0 to 76 mm)length of legs and thickness ranging from764to38in.(2.8 to9.5 mm),inclusive.(2)Tees,114,138,112by18and316in.thickness(32,35,38 mm by 3.2 and 4.8 mm thickness).(3)Channels,1 to 212i
8、n.(25 to 64 mm),inclusive,indepth and38to 1 in.(9.5 to 25 mm),inclusive,in width offlange.3.1.1.5 Special Bar Sections:(1)Ovals,from58to78in.(15.9 to 22.2 mm)in longestdimension by516to716in.(7.9 to 11.1 mm),inclusive,in thesmall dimension.(2)Diamonds,78and1316in.(22.2 and 20.6 mm)in thelongest dime
9、nsion by58to34in.(15.9 to 19.0 mm),inclusive,in the smallest dimension.(3)I-Beams,112and 218in.(35 and 54 mm)in width and18to14in.(3.2 to 6.4 mm),inclusive,in thickness.(4)U-Bars,114and 1516in.(32 and 33 mm)in width and532to516in.(4.0 to 7.9 mm)in thickness.(5)Channeled Flats,114to 2 in.(32 to 51 mm
10、),inclusive,in depth,and316to38in.(4.8 to 9.5 mm),inclusive,inthickness.4.Ordering Information4.1 Orders for material under this specification shouldinclude the following information:4.1.1 Quantity(weight or number of pieces),4.1.2 Name of material(rail steel carbon bars),4.1.3 Grade of steel(Grade
11、50,Grade 60,Grade 70,andGrade 80),4.1.4 Dimensions(diameter,thickness,width,etc.andlength),4.1.5 Cross section(rounds,square,hexagon,etc.)(3.1),4.1.6 ASTM designation and date of issue,4.1.7 Certification,if required(Section 11),and4.1.8 End use.NOTE1A typical ordering description is as follows:10 0
12、00 lb,railsteel carbon bars,1.000 in.diameter by 10 ft,round,ASTM A499 dated_.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and RelatedAlloys and is the direct responsibility of A01.15 on Bars.Current edition approved March 1,2015.Published March 2015.O
13、riginallyapproved in 1964.Last previous edition approved in 2008 as A499 89(2008).DOI:10.1520/A0499-15.2For 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 Docu
14、ment Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.General Requirements5.1 Material furnished under this specification shall con-form to the applicable requirements of the current edition ofSpecificatio
15、n A29/A29M,unless otherwise provided herein.6.Materials and Manufacture6.1 MaterialThe material shall be hot wrought fromstandard section“T”rails.No other materials,such as thoseknown by the terms“rerolled,”“rail steel equivalent,”or“railsteel quality,”shall be substituted.6.2 Hot FormingThe materia
16、l shall be produced by hotforming slit railroad rail parts to yield straight lengths in thesections and nominal sizes specified in 3.1.1.6.3 Condition:6.3.1 The material shall be furnished hot wrought,aswrought.6.3.2 The material shall be furnished in cut lengths or rangesof random lengths,as specified by the purchaser.7.Chemical Composition7.1 The chemical composition of rails does not changeduring use in track,reheating,slitting or rolling;consequently,the composition of rail steel products wi
