ASTM A499-2015 Standard Specification for Steel Bars and Shapes Carbon Rolled from &ldquo T&rdquo Rails《“T”字轨轧制碳素钢棒材及型材的标准规格》.pdf

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1、Designation: A499 15Standard 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.

2、A number 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

3、 shapesproduced 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 val

4、ues stated in inch-pound 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 S

5、pecification for General 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

6、 and nominal sizes:3.1.1.1 Rounds, Squares, and Round Corner Squares insizes ranging from38 to 114 in. (9.5 to 32 mm).3.1.1.2 Square and Round Edge Flats,58 to 5 in. (15.9 to127 mm), inclusive, in width and thickness from764 to 1 in.(2.8 to 25 mm), inclusive, within 6 lb/ft (8.8 kg/m) limit.3.1.1.3

7、Hexagons and Octagons, in sizes12 to 1 in. (12.7 to25 mm) in116-in. (1.6-mm) increments.3.1.1.4 Bar Size Shapes:(1) Equal and Unequal Angles,34 to 3 in. (19.0 to 76 mm)length of legs and thickness ranging from764 to38 in. (2.8 to9.5 mm), inclusive.(2) Tees, 114,138,112 by18 and316 in. thickness (32,

8、 35,38 mm by 3.2 and 4.8 mm thickness).(3) Channels,1to212 in. (25 to 64 mm), inclusive, indepth and38 to 1 in. (9.5 to 25 mm), inclusive, in width offlange.3.1.1.5 Special Bar Sections:(1) Ovals, from58 to78 in. (15.9 to 22.2 mm) in longestdimension by516 to716 in. (7.9 to 11.1 mm), inclusive, in t

9、hesmall dimension.(2) Diamonds,78 and1316 in. (22.2 and 20.6 mm) in thelongest dimension by58 to34 in. (15.9 to 19.0 mm), inclusive,in the smallest dimension.(3) I-Beams,112 and 218 in. (35 and 54 mm) in width and18 to14 in. (3.2 to 6.4 mm), inclusive, in thickness.(4) U-Bars,114 and 1516 in. (32 an

10、d 33 mm) in width and532 to516 in. (4.0 to 7.9 mm) in thickness.(5) Channeled Flats,114 to 2 in. (32 to 51 mm), inclusive,in depth, and316 to38 in. (4.8 to 9.5 mm), inclusive, inthickness.4. Ordering Information4.1 Orders for material under this specification shouldinclude the following information:

11、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 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

12、and date of issue,4.1.7 Certification, if required (Section 11), and4.1.8 End use.NOTE 1A typical ordering description is as follows: 10 000 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,St

13、ainless Steel and RelatedAlloys and is the direct responsibility of A01.15 on Bars.Current edition approved March 1, 2015. Published March 2015. Originallyapproved in 1964. Last previous edition approved in 2008 as A499 89 (2008).DOI: 10.1520/A0499-15.2For referenced ASTM standards, visit the ASTM w

14、ebsite, 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.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United St

15、ates15. General Requirements5.1 Material furnished under this specification shall con-form to the applicable requirements of the current edition ofSpecification A29/A29M, unless otherwise provided herein.6. Materials and Manufacture6.1 MaterialThe material shall be hot wrought fromstandard section “

16、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 material shall be produced by hotforming slit railroad rail parts to yield straight lengths in thesections and nominal sizes specified in

17、 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,

18、 slitting or rolling; consequently,the composition of rail steel products will fall within the limitsspecified in Specification A1 for standard section “T” rails ofbasic-oxygen or electric-furnace process.7.2 Rail steel products are not supplied to definite compo-sition limits. By mutual agreement w

19、ith the manufacturer,material may be supplied from rails with a desired range ofcarbon and manganese when such rails are available.8. Mechanical Properties8.1 RequirementsThe material as represented by the testspecimens shall conform to the tensile or hardness require-ments specified in Table 1.8.2

20、Test SpecimensTest specimens may be taken from afull section or a machined section.8.3 Number of TestsOne tension test or one hardness test,at the manufacturers option, shall be made from each lot.Alotshall consist of one section of the same size produced in onecontinuous shift (turn) of operation (

21、normally an 8-h period).9. Dimensions and Permissible Variations9.1 DimensionsThe permissible variations in dimensionsshall be in accordance with the requirements specified inTables 2-7. Due to differences in mill facilities, tolerances ofspecial bar sections vary among the manufacturers and suchtol

22、erances are subject to agreement between manufacturer andpurchaser.9.2 LengthThe permissible variations for length shall bein accordance with the requirements specified in Table 8.9.3 StraightnessVariations in straightness shall not exceed14 in. (6.4 mm) in any 5 ft (1.52 m); or14 in. number of feet

23、of length divided by 5 (6.4 mm number of metres of lengthdivided by 1.52).10. Finish and Appearance10.1 DescalingThe bars shall be furnished “not descaled.”11. Certification and Report of Testing11.1 Upon request of the purchaser in the contract or order,a manufacturers certification that the materi

24、al was manufac-tured and tested in accordance with this specification togetherwith a report of the test results shall be furnished at the time ofshipment.12. Keywords12.1 carbon steel bars; carbon steel shapesTABLE 1 Mechanical RequirementsGrade 50 Grade 60 Grade 70 Grade 80Tensile strength, min, ks

25、i (MPa) 80 (550) 90 (620) 95 (655) 110 (760)Yield point, min, ksi (MPa) 50 (345) 60 (415) 70 (485) 80 (550)Elongation in 8 in. or 200 mm,min, %5555Elongation in 2 in. or 50 mm,min, %7777Brinell hardness, minA159 190 197 229Rockwell B hardness, minA83 91 93 98AHardness tests are an acceptable alterna

26、tive for tension tests where the bar sizeprecludes a tension test specimen in accordance with Test Methods and Defini-tions A370.A499 152TABLE 2 Permissible Variations in Thickness and Length of Leg for AnglesSpecified Length of Leg, in.(mm)APermissible Variations in Thickness, for Thickness Given,

27、Over andUnder, in. (mm)Permissible Variations in Length of Leg, forThickness Given, Over and Under, in. (mm)To316 (4.8), inclOver316 to38 (4.8 to9.5), inclOver38 (9.5)To316 (4.8),inclOver316 to14(4.8 to 6.4), inclOver14 (6.4)To 1 (25), incl 0.008 (0.203) 0.010 (0.255) . . .132 (0.8)364 (1.2)BOver 1

28、to 2 (25 to 51), incl 0.010 (0.255) 0.010 (0.255) 0.012 (0.305)364 (1.2)116 (1.6)BOver 2 to 3 (51 to 76), incl 0.012 (0.305) 0.015 (0.380) 0.015 (0.380)116 (1.6)116 (1.6)BAThe longer leg of an unequal angle determines the size for tolerance. The out-of-square tolerance in either direction is 112 deg

29、 (0.03 rad).BDue to differences in mill facilities and rolling techniques, these are subject to agreement between manufacturer and purchaser.TABLE 3 Permissible Variations in Thickness and Width for Square and Round Edge FlatsSpecified Width, in. (mm)Permissible Variations in Thickness for Thickness

30、 Given, Overand Under, in. (mm)Permissible Variations in Width, in. (mm)To12 (12.7), incl Over12 to 1 (12.7 to 25), incl Over UnderTo 1 (25), incl 0.008 (0.203) 0.010 (0.255)132 (0.8)132 (0.8)Over 1 to 2 (25 to 51), incl 0.012 (0.305) 0.015 (0.380)132 (0.8)132 (0.8)Over 2 to 4 (51 to 102), incl 0.01

31、5 (0.380) 0.020 (0.510)116 (1.6)132 (0.8)Over 4 to 6 (102 to 152), incl 0.015 (0.380) 0.020 (0.510)332 (2.4)116 (1.6)TABLE 4 Permissible Variations in Cross Section for Rounds, Squares, and Round-Cornered SquaresSpecified Size, in. (mm) Permissible Variation from Specified Size, in. (mm)Out-of-Round

32、 or Out-of-Square,in. (mm)AOver UnderOver516 to716 (7.9 to 11.1), incl 0.012 (0.305) 0.012 (0.305) 0.018 (0.455)Over716 to 1 (11.1 to 25), incl 0.015 (0.380) 0.015 (0.380) 0.022 (0.600)Over 1 to 114 (25 to 32), incl 0.020 (0.510) 0.020 (0.510) 0.030 (0.760)AOut-of-round is the difference between the

33、 maximum and minimum diameters of the bar, measured at the same cross section. Out-of-square is the difference in the twodimensions at the same cross section of a square between opposite faces.TABLE 5 Permissible Variations for Octagons and HexagonsSpecified Size Between Opposite Faces, in.(mm)Permi

34、ssible Variations from Specified Size, in. (mm) Out-of-Hexagon or Out-of-Octagon,in. (mm)AOver UnderTo12 (12.7), incl 0.010 (0.255) 0.007 (0.178) 0.015 (0.380)Over12 to 1 (12.7 to 25), incl 0.015 (0.380) 0.015 (0.380) 0.020 (0.510)AOut-of-hexagon and out-of-octagon is the greatest difference between

35、 any two dimensions at the same cross section between opposite faces.TABLE 6 Permissible Variations in Dimensions for ChannelsSpecified Size of Channel, in.(mm)Permissible Variations in Size, Over and Under, in. (mm)Out-of-Square of EitherFlange, in./in. (mm/mm) ofFlange WidthDepth of SectionAWidth

36、of FlangesAThickness of Web for Thickness GivenTo316 (4.8), incl Over316 (4.8)To 112 (38), incl132 (0.8)132 (0.8) 0.010 (0.255) 0.015 (0.380)364 (1.2)Over 112 to 3 (38 to 76), incl116 (1.6)116 (1.6) 0.015 (0.380) 0.020 (0.510)364 (1.2)AMeasurements for depth of section and width of flanges are over-

37、all. This table does not include special channel sections, that is, Flange “u” Channel).A499 153ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determin

38、ation of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or wit

39、hdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that yo

40、ur comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (sin

41、gle or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright C

42、learance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 7 Permissible Variations in Dimensions for TeesSpecified Size of Tee,in. (mm)APermissible Variations in Size, in. (mm) Thickness of StemStem Out-of-SquareBWidth or DepthCThickness of FlangeOver Under Over Under Over U

43、nderTo 114 (32), incl364 (1.2)364 (1.2) 0.010 (0.255) 0.010 (0.255) 0.005 (0.127) 0.020 (0.510)132 (0.8)Over 114 to 2116 (1.6)116 (1.6) 0.012 (0.305) 0.012 (0.305) 0.010 (0.255) 0.020 (0.510)116 (1.6)(32 to 51), inclAThe longer member of the unequal tee determines the size for tolerances.BStem out-o

44、f-square is the variation from its true position of the center line of the stem measured at the point.CMeasurements for both width and depth are overall.TABLE 8 Permissible Variations in LengthSpecified Size of Rounds,Squares, Hexagons, andOctagonsSpecified Size of Flats, in. (mm) Permissible Variat

45、ions Over Specified Length, in. (mm)A,BThickness WidthTo5ft(1.52 m),inclOver 5 to 10ft (1.52 to3.05 m),inclOver 10 to 20ft (3.05 to6.10 m),inclOver 20 to 30ft (6.10 to9.14 m),incl30 to 40 ft(9.14 to12.19 m)Mill ShearingTo 1 (25), incl To 1 (25), incl To 3 (76), incl38 (9.5)12 (12.7)58 (15.9)34 (19.0

46、) 114 (32)Over 1 to 2 (25 to 51), incl To 1 (25), incl Over 3 to 6 (76 to 152),incl12 (12.7)58 (15.9)34 (19.0) 1 (25) 112 (38)Other Sections Classified as BarSize, Shapes, and Angles12 (12.7)58 (15.9)34 (19.0) 1 (25) 112 (38)ANo permissible variations under.BWhere a plus and minus tolerance from specified length is desired and the order so specifies, half of these tolerances may be taken over and half under.A499 154