1、Designation: A709/A709M 11A709/A709M 13Standard 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 revision
2、. 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 al
3、loy steel for structural plates intended for use in bridges. Seven grades are available in four yield strength levels asfollows:Grade 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 100W HPS 690W 100 6901.1.1 Gr
4、ades 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 8 or Table 9 or the supplementary requirementsof this specification are specified, they exceed the requirements of Specificati
5、ons A36/A36M, A572/A572M, A992/A992M, andA588/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 100W HPS 690W shall not be subst
6、ituted 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 presupposed that a welding pr
7、ocedure 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 requirements areprovided in this st
8、andard, 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 purchase order.1.6 The values sta
9、ted 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-conformance with the standard.1.
10、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. Referenced Documents2.1 ASTM Standards
11、: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 jurisdiction ofASTM Committe
12、e 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 May 1, 2011May 1, 2013. Published May 2011May 2013. Originally approved in 1974. Last previous edition
13、 approved in 20102011 asA709/A709M 10.A709/A709M 11. DOI: 10.1520/A0709_A0709M-11. 10.1520/A0709_A0709M-13.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standa
14、rds 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 adequately depict all changes accurately
15、, 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 ASTM International, 100 Barr Harbor Drive
16、, 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 Point, withAtmospheric Corrosion Resistance
17、A673/A673M Specification for Sampling Procedure for Impact Testing of Structural SteelA992/A992M Specification for Structural Steel ShapesG101 Guide for Estimating the Atmospheric Corrosion Resistance of Low-Alloy Steels3. Terminology3.1 Definitions of Terms Specific to This Standard:TABLE 1 Tensile
18、 and Hardness RequirementsANOTE 1Where “. . .” appears in this table, there is no requirement.Grade Plate Thickness,in. mmStructural Shape Flangeor LegThickness, in. mmYield Pointor YieldStrength,BksiMPaTensileStrength,ksi MPaMinimum Elongation, %Reduc-tion ofAreaC,Dmin, %Plates and BarsC,E ShapesE8
19、 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 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 5065345450HI65 450H min . . 18 21 .50W 345W and
20、HPS 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 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 orientat
21、ion and preparation subsection in the Tension Tests section of Specification A6/A6M.B Measured at 0.2 % offset or 0.5 % extension under load 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
22、. 600 mm, the reduction of area requirement, where applicable, is reduced by five percentage points.E For plates wider than 24 in. 600 mm, the elongation requirement is reduced by two percentage points. See elongation requirement adjustments in the Tension Testssection of Specification A6/A6M.F Elon
23、gation 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 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 permitt
24、ed 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, 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
25、 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 (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 applicab
26、le to Fracture Critical Tension Components (see Table 9).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 Analysis section of Specifica
27、tion A6/A6M.ProductThickness,in. (mm)ShapesAAllPlatesB BarsBTo 3420, inclOver 34to 112 20 to 40,inclOver 112 to212 40 to 65,inclOver 212 to 465 to 100,inclTo 3420,inclOver 34 to112 20 to40, inclOver 112 to4 100, inclCarbon, max, % 0.26 0.25 0.25 0.26 0.27 0.26 0.27 0.28Manganese, % . . 0.801.20 0.80
28、1.20 0.851.20 . 0.600.90 0.600.90Phosphorus, max, % 0.04 0.04 0.04 0.04 0.04 0.04 0.04 0.04Sulfur, max, % 0.05 0.05 0.05 0.05 0.05 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
29、 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
30、 maximumof 1.35 %.A709/A709M 1323.1.1 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.3.1.2 main load-carrying membera steel member de
31、signed 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 paths.3.1.4 non-tension componenta steel member
32、 that is not in tension under any design loading.TABLE 3 Grade 50 345 Chemical RequirementsA (Heat Analysis)SiliconCColumbium,Vanadiumand NitrogenMaximumDiameter,Thickness, orDistanceBetweenParallel Faces,in. mmCarbon,max, %Manganese,Bmax, %Phosphorus,max, %Sulfur,max, %Plates to112-in. 40-mmThick,S
33、hapes with flangeor legthicknessto 3 in. 75 mminclusive, SheetPiling, Bars, Zees,and RolledTees,max, %DPlates Over112-in. 40-mmThick and Shapeswith flange thicknessover 3 in. 75 mm, %4 100 0.23 1.35 0.04 0.05 0.40 0.150.40 EA Copper when specified shall have a minimum content of 0.20 % by heat analy
34、sis (0.18 % by product analysis).B Manganese, minimum by heat analysis of 0.80 % (0.75 % by product analysis) shall be required for all plates over 38 in. 10 mm in thickness; a minimum of 0.50% (0.45 % by product analysis) shall be required for plates 38 in. 10 mm and less in thickness, and for all
35、other products. The manganese to carbon ratio shall notbe less than 2 to 1. For each reduction of 0.01 percentage point below the specified carbon maximum, an increase of 0.06 percentage point manganese above thespecified maximum is permitted, up to a maximum of 1.60 %.C Silicon content in excess of
36、 0.40 % by heat analysis must be negotiated.D Bars over 112 in. 40 mm in diameter, thickness, or distance between parallel faces, shall be made by a killed steel practice.E Alloy content shall be in accordance with Type 1, 2, 3, or 5 and the contents of the applicable elements shall be reported on t
37、he test report.Type Elements Heat Analysis, %1 ColumbiumA 0.0050.05B2 Vanadium 0.010.153 ColumbiumAVanadiumColumbium plus vanadium0.0050.05B0.010.150.020.15C5 TitaniumNitrogenVanadium0.0060.040.0030.0150.06 maxA Columbium shall be restricted to Grade 50 345 plate, bar, zee, and rolled tee thickness
38、of 34 in. 20 mm max, and to shapes with flange or leg thickness to 112 in. 40mm inclusive unless killed steel is furnished. Killed steel shall be confirmed by a statement of killed steel on the test report, or by a report of the presence of a sufficientquantity of a strong deoxidizing element, such
39、as silicon at 0.10 % or higher, or aluminum at 0.015 % or higher.B Product analysis limits = 0.004 to 0.06 %.C Product analysis limits = 0.01 to 0.16 %.TABLE 4 Grade 50W 345 W Chemical Requirements (HeatAnalysis)NOTE 1Types A and B are equivalent to Specification A588/A588M,Grades A and B, respectiv
40、ely.Element Composition, %AType A Type BCarbonB 0.19 max 0.20 maxManganeseB 0.801.25 0.751.35Phosphorus 0.04 max 0.04 maxSulfur 0.05 max 0.05 maxSilicon 0.300.65 0.150.50Nickel 0.40 max 0.50 maxChromium 0.400.65 0.400.70Copper 0.250.40 0.200.40Vanadium 0.020.10 0.010.10A Weldability data for these t
41、ypes have been qualified by FHWA for use in bridgeconstruction.B For each reduction of 0.01 percentage point below the specified maximum forcarbon, an increase of 0.06 percentage point above the specified maximum formanganese is permitted, up to a maximum of 1.50 %.A709/A709M 1333.1.5 secondary memb
42、era 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 loads3.1.6 tension componenta part or element of a fracture critical or non-fracture critical member that is in tension u
43、nder 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 beconsidered if applicable:4.1.1 Type of component (tension or non-tension, fracture critical or non-fracture critical) (see
44、 Section 10).TABLE 5 Grades HPS 50W HPS 345W and HPS 70WHPS 485 W, and HPS 100W HPS 690W Chemical Requirements(Heat Analysis)NOTE 1Where “. . .” appears in this table, there is no requirement.ElementComposition, %GradesHPS 50W HPS345W,HPS 70W HPS485WGradeHPS 100W HPS690WCarbon 0.11 max 0.08 maxManga
45、nese2.5 in. 65 mm andunder1.101.35 0.951.50Over 2.5 in. 65 mm 1.101.50 0.951.50Phosphorus 0.020 max 0.015 maxSulfurA 0.006 max 0.006 maxSilicon 0.300.50 0.150.35Copper 0.250.40 0.901.20Nickel 0.250.40 0.650.90Chromium 0.450.70 0.400.65Molybdenum 0.020.08 0.400.65Vanadium 0.040.08 0.040.08Columbium (
46、Niobium) . . . 0.010.03Aluminum 0.0100.040 0.0200.050Nitrogen 0.015 max 0.015 maxA The steel shall be calcium treated for sulfide shape control.TABLE 6 Grade 50S 345S Chemical Requirements(Heat Analysis)Element Composition, %Carbon, max 0.23Manganese 0.50 to 1.60ASilicon, max 0.40Vanadium, max 0.15B
47、Columbium, max 0.05BPhosphorus, max 0.035Sulfur, max 0.045Copper, max 0.60Nickel, max 0.45Chromium, max 0.35Molybdenum, max 0.15A Provided that the ratio of manganese to sulfur is not less than 20 to 1, theminimum limit for manganese for shapes with flange or leg thickness notexceeding 1 in. 25 mm s
48、hall be 0.30 %.B The sum of columbium and vanadium shall not exceed 0.15 %.TABLE 7 Relationship Between Impact Testing TemperatureZones and Minimum Service TemperatureZone Minimum Service Temperature, F C1 0 182 below 0 to 30 18 to 343 below 30 to 60 34 to 51A709/A709M 1344.2 Impact testing temperature zone (see Table 7).5. General Requirements for Delivery5.1 Structural products furnished under this specification shall conform to the requirements of the current edition ofSpecification A6/A6M, for the specific structural product ordered, unless
