1、Designation: A709/A709M 13aA709/A709M 15Standard Specification forStructural Steel for Bridges1This standard is issued under the fixed designation A709/A709M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of last revisio
2、n. 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 low-alloy steel structural shapes, plates, and bars and quenched andtempered a
3、lloy steel for structural plates intended for use in bridges. Seven grades are available in four yield strength levels asfollows:colwidth=“36.18*“/COLSPECGrade U.S. SI Yield Strength, ksi MPa36 250 36 25050 345 50 34550S 345S 50 34550W 345W 50 345HPS 50W HPS 345W 50 345HPS 70W HPS 485W 70 485HPS 100
4、W HPS 690W 100 6901.1.1 Grades 36 250, 50 345, 50S 345S, and 50W 345W are also included in Specifications A36/A36M, A572/A572M,A992/A992M, and A588/A588M, respectively. When the requirements of Table 89 or Table 910 or the supplementaryrequirements of this specification are specified, they exceed th
5、e requirements of Specifications A36/A36M, A572/A572M,A992/A992M, and A588/A588M.1.1.2 Grades 50W 345W, HPS 50W HPS 345W, HPS 70W HPS 485W, and HPS 100W HPS 690W have enhancedatmospheric corrosion resistance (see 13.1.2). Product availability is shown in Table 1.1.2 Grade HPS 70W HPS 485W or HPS 100
6、W HPS 690W shall not be substituted for Grades 36 250, 50 345, 50S345S, 50W 345W, or HPS 50W HPS 345W. Grade 50W 345W, or HPS 50W HPS 345W shall not be substituted forGrades 36 250, 50 345 or 50S 345S without agreement between the purchaser and the supplier.1.3 When the steel is to be welded, it is
7、presupposed that a welding procedure suitable for the grade of steel and intended useor service will be utilized. See Appendix X3 of Specification A6/A6M for information on weldability.1.4 For structural products to be used as tension components requiring notch toughness testing, standardized requir
8、ements areprovided in this standard, and they are based upon American Association of State Highway and Transportation Officials(AASHTO) requirements for both fracture critical and non-fracture critical members.1.5 Supplementary requirements are available but shall apply only if specified in the purc
9、hase order.1.6 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in eachsystem may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from thetwo systems may result in non-con
10、formance with the standard.1.7 For structural products produced from coil and furnished without heat treatment or with stress relieving only, the additionalrequirements, including additional testing requirements and the reporting of additional test results, of Specification A6/A6M apply.2. Reference
11、d Documents2.1 ASTM Standards:2A6/A6M Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet PilingA36/A36M Specification for Carbon Structural SteelA370 Test Methods and Definitions for Mechanical Testing of Steel Products1 This specification is under the
12、 jurisdiction ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee A01.02on Structural Steel for Bridges, Buildings, Rolling Stock and Ships.Current edition approved Oct. 1, 2013Sept. 1, 2015. Published November 2013September 2015. Origina
13、lly approved in 1974. Last previous edition approved in 2013 asA709/A709M 13.A709/A709M 13a. DOI: 10.1520/A0709_A0709M-13A.10.1520/A0709_A0709M-15.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standard
14、svolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to
15、adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright A
16、STM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1A572/A572M Specification for High-Strength Low-Alloy Columbium-Vanadium Structural SteelA588/A588M Specification for High-Strength Low-Alloy Structural Steel, up to 50 ksi 345 MPa Minimum Yield Poi
17、nt, withAtmospheric Corrosion ResistanceA673/A673M Specification for Sampling Procedure for Impact Testing of Structural SteelA992/A992M Specification for Structural Steel ShapesTABLE 1 Tensile and Hardness RequirementsANOTE 1Where “. . .” appears in this table, there is no requirement.colname=“col2
18、“ colwidth=“0.79in“ colname=“col3“ colwidth=“1.15in“ colname=“col4“ colwidth=“0.80in“ colname=“col5“colwidth=“0.92in“ colname=“col6“ colwidth=“0.50in“ colname=“col7“ colwidth=“0.50in“ colname=“col8“colwidth=“0.50in“ colname=“col9“ colwidth=“0.50in“ colname=“col10“ colwidth=“0.50in“GradePlateThicknes
19、s,in. mmStructuralShape Flangeor LegThickness, in.mmYield Pointor YieldStrength,BksiMPaTensileStrength,ksi MPaMinimumElongation, %Reduc-tion ofAreaC,Dmin, %Plates andBarsC,E ShapesE8 in.or 200mm2 in.or 50mm8 in.or 200mm2 in.or 50mm36 250 to 4 100, incl to 3 in. 75mm, incl36 250 min 588040055020 23 2
20、0 21 .over 3 in. 75mm36 250 min 58 400 min . 20 19 .50 345 to 4 100, incl all 50 345 min 65 450 min 18 21 18 21F .50S 345S G all 5065345450HI65 450H min . . 18 21 .50W 345W andHPS 50WHPS 345Wto 4 100, incl all 50 345 min 70 485 min 18 21 18 21J.HPS 70WHPS 485 Wto 4 100, incl G 70 485 minB 8511058576
21、0. 19K . . .HPS 100WHPS 690Wto 212 65,inclG 100 690minB110130760895. 18K . . Lover 212 to 465 to 100,inclMG 90 620 minB 100130690895. 16K . .LTABLE 1 Tensile and Hardness RequirementsANOTE 1Where “. . .” appears in this table, there is no requirement.Grade Plate Thickness,in. mmStructural ShapeFlang
22、eor LegThickness, in. mmYield Pointor YieldStrength,BksiMPaTensileStrength,ksi MPaMinimum Elongation, %ReductionofAreaC,Dmin, %Plates and BarsC, E ShapesE8 in.or 200mm2 in.or 50mm8 in.or 200mm2 in.or 50mm36 250 to 4 100, incl to 3 in. 75 mm, incl 36 250 min 5880 400550 20 23 20 21 .over 3 in. 75 mm
23、36 250 min 58 400 min . . 20 19 .50 345 to 4 100, incl all 50 345 min 65 450 min 18 21 18 21F .50S 345S G all 5065345450H,I65 450H min . . 18 21 .50W 345WandHPS 50WHPS 345Wto 4 100, incl all 50 345 min 70 485 min 18 21 18 21J .HPS 70WHPS 485 Wto 4 100, incl G 70 485 minB 85110 585760 . 19K . . .HPS
24、100WHPS 690Wto 212 65, incl G 100 690 minB 110130 760895 . 18K . . Lover 212 to 465 to 100, inclMG 90 620 minB 100130 690895 . 16K . . LA See specimen orientation and preparation subsection in the Tension Tests section of Specification A6/A6M.B Measured at 0.2 % offset or 0.5 % extension under load
25、as described in Section 13 of Test Methods A370.C Elongation and reduction of area not required to be determined for floor plates.D For plates wider than 24 in. 600 mm, the reduction of area requirement, where applicable, is reduced by five percentage points.E For plates wider than 24 in. 600 mm, th
26、e elongation requirement is reduced by two percentage points. See elongation requirement adjustments in the Tension Testssection of Specification A6/A6M.F Elongation in 2 in. or 50 mm: 19 % for shapes with flange thickness over 3 in. 75 mm.G Not applicable.H The yield to tensile ratio shall be 0.87
27、or less for shapes that are tested from the web location; for all other shapes, the requirement is 0.85.I A maximum yield strength of 70 ksi 480 MPa is permitted for structural shapes that are required to be tested from the web location.J For wide flange shapes with flange thickness over 3 in. 75 mm
28、, elongation in 2 in. or 50 mm of 18 % minimum applies.K If measured on the Fig. 3 (Test Methods A370) 112-in. 40mm wide specimen, the elongation is determined in a 2-in. or 50-mm gage length that includes the fractureand shows the greatest elongation.L 40 % minimum applies if measured on the Fig 3
29、(Test Methods A370) 112-in. 40-mm wide specimen; 50 % minimum applies if measured on the Fig. 4 (Test MethodsA370) 12-in. 12.5-mm round specimen.M Not applicable to Fracture Critical Tension Components (see Table 910).A709/A709M 152G101 Guide for Estimating the Atmospheric Corrosion Resistance of Lo
30、w-Alloy Steels3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 fracture critical membera main load-carrying tension member or tension component of a bending member whose failurewould be expected to cause collapse of a structure or bridge without multiple, redundant load paths.3
31、.1.2 main load-carrying membera steel member designed to carry primary design loads, including dead, live, impact, andother loads.3.1.3 non-fracture critical membera main load-carrying member whose failure would not be expected to cause collapse of astructure or bridge with multiple, redundant load
32、paths.3.1.4 non-tension componenta steel member that is not in tension under any design loading.3.1.5 secondary membera steel member used for aligning and bracing of main load-carrying members, or for attachingutilities, signs, or other items to them, but not to directly support primary design loads
33、3.1.6 tension componenta part or element of a fracture critical or non-fracture critical member that is in tension under variousdesign loadings.4. Ordering Requirements4.1 In addition to the items listed in the ordering information section of Specification A6/A6M, the following items should beconsid
34、ered if applicable:4.1.1 Type of component (tension or non-tension, fracture critical or non-fracture critical) (see Section 10).4.2 Impact testing temperature zone (see Table 78).5. General Requirements for Delivery5.1 Structural products furnished under this specification shall conform to the requ
35、irements of the current edition ofSpecification A6/A6M, for the specific structural product ordered, unless a conflict exists in which case this specification shallprevail.5.2 Coils are excluded from qualification to this specification until they are processed into a finished structural product.Stru
36、ctural products produced from coil means structural products that have been cut to individual lengths from a coil. Theprocessor directly controls, or is responsible for, the operations involved in the processing of a coil into a finished structuralproduct. Such operations include decoiling, leveling
37、 or straightening, hot-forming or cold-forming (if applicable), cutting to length,testing, inspection, conditioning, heat treatment (if applicable), packaging, marking, loading for shipment, and certification.NOTE 1For structural products produced from coil and furnished without heat treatment or wi
38、th stress relieving only, two test results are to be reportedfor each qualifying coil. Additional requirements regarding structural products produced from coil are described in Specification A6/A6M.6. Materials and Manufacture6.1 For all Grades, the steel shall be killed.6.2 For Grades 50W 345W, HPS
39、 50W HPS 345W, and HPS 70W HPS 485W, the steel shall be made to fine grain practice.TABLE 2 Grade 36 250 Chemical Requirements (Heat Analysis)NOTE 1Where “. . .” appears in this table there is no requirement. The heat analysis for manganese shall be determined and reported as describedin the Heat An
40、alysis section of Specification A6/A6M.colwidth=“9.89*“/COLSPECProductThickness,in. (mm)mmShapesAAllPlates 15 in. 380 mm WidthB BarsBars, PlatesTo 3420, inclOver 34to 112 20 to40, inclOver 112 to212 40 to65, inclOver 212 to 465 to 100,inclTo 3420,inclOver 34 to112 20 to40, inclOver 112 to4 100, 40 t
41、o100, inclCarbon, max, % 0.26 0.25 0.25 0.26 0.27 0.26 0.27 0.28Manganese, % . . 0.801.20 0.801.20 0.851.20 . 0.600.90 0.600.90Phosphorus, max, % 0.04 0.04 0.04 0.04 0.04 0.04 0.04 0.04Phosphorus, max, % 0.04 0.030 0.030 0.030 0.030 0.04 0.04 0.04Sulfur, max, % 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.0
42、5Sulfur, max, % 0.05 0.030 0.030 0.030 0.030 0.05 0.05 0.05Silicon, % 0.40 max 0.40 max 0.40 max 0.150.40 0.150.40 0.40 max 0.40 max 0.40 maxCopper, min, % whencopper steel is specified0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20Copper, min, % when cop-per steel is specified0.20 0.20 0.20 0.20 0.20 0.20
43、0.20 0.20A Manganese content of 0.85 to 1.35 % and silicon content of 0.15 to 0.40 % is required for shapes with flange thickness over 3 in. 75 mm.B For each reduction of 0.01 % below the specified carbon maximum, an increase of 0.06 % manganese above the specified maximum will be permitted up to a
44、maximumof 1.35 %.A709/A709M 1536.3 For Grade 50S 345S, the steelmaking practice used shall be one that produces steel having a nitrogen content not greaterthan 0.015 % and includes the addition of one or more nitrogen-binding elements, or one that produces steel having a nitrogencontent of not great
45、er than 0.012 % (with or without the addition of nitrogen-binding elements). The nitrogen content need not bereported, regardless of which steelmaking practice was used.6.4 For Grades HPS 50W HPS 345W, HPS 70W HPS 485W, and HPS 100W HPS 690W, the steel shall be made usinga low-hydrogen practice, suc
46、h as vacuum degassing during steel making; controlled soaking of the ingots, slabs; controlled slowcooling of the ingots, slabs, or plates, or a combination thereof.6.5 For Grade HPS 100W HPS 690W, the requirements for fine austenitic grain size in Specification A6/A6M shall be met.6.6 Grades HPS 50
47、W HPS 345W and HPS 70W HPS 485W shall be furnished in one of the following conditions: as-rolled,control-rolled, thermo-mechanical control processed (TMCP) with or without accelerated cooling, or quenched and tempered.TABLE 3 Grade 50 345 Chemical RequirementsA (Heat Analysis)colwidth=“0.631in“ colw
48、idth=“0.679in“ colwidth=“0.767in“ colwidth=“0.745in“ colwidth=“0.917in“ colwidth=“1.277in“colwidth=“1.304in“ SiliconC Columbium,Vanadiumand NitrogenMaximumDiameter,Thickness, orDistanceBetweenParallel Faces,in. mmCarbon,max, %Manganese,Bmax, %Phosphorus,max, %Sulfur,max, %Plates to112-in. 40-mmThick,Shapes with flangeor legthicknessto 3 in. 75 mminclusive, SheetPiling, Bars, Zees,and RolledTees,max, %Plates Over112-in. 40-mmThick and Shapeswith flangethicknessover 3 in. 75 mm,%4 100 0.23 1.35 0.04 0.05 0.40 0.150.40 DA Copper when
