A0709_A0709M-06桥梁用结构钢.pdf

Designation:A 709/A 709M 06Standard Specification forStructural Steel for Bridges1This standard is issued under the fixed designationA709/A709M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon(e)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 alloy steel for structural plates intended for use inbridges.Nine grades are available in four yield strength levelsas follows:Grade U.S.SIYield Strength,ksi MPa36 25036 25050 34550 34550S 345S50 34550W 345W50 345HPS 50W HPS 345W50 345HPS 70W HPS 485W70 485100 690100 690100W 690W100 690HPS 100W HPS 690W100 6901.1.1 Grades 36 250,50 345,50S 345S,50W 345W,100 690,and 100W 690W are also included in Specifica-tions A 36/A 36M,A 572/A 572M,A 992/A 992M,A 588/A588M,and A 514/A 514M,respectively.When the supplemen-tary requirements of this specification are specified,theyexceed the requirements of Specifications A 36/A 36M,A 572/A 572M,A 992/A 992M,A 588/A 588M,and A 514/A514M.1.1.2 Grades 50W 345W,HPS 50W HPS 345W,HPS70W HPS 485W,100W 690W,and HPS 100W HPS690W have enhanced atmospheric corrosion resistance(see14.1.2).Product availability is shown in Table 1.1.2 Grade HPS 70W HPS 485W,100 690,100W690W,or HPS 100W HPS 690W shall not be substitutedfor Grades 36 250,50 345,50S 345S,50W 345W,orHPS 50W HPS 345W.Grade 50W 345W,or HPS 50WHPS 345W shall not be substituted for Grades 36 250,50345 or 50S 345S without agreement between the purchaserand the supplier.1.3 When the steel is to be welded,it is presupposed that awelding procedure suitable for the grade of steel and intendeduse or service will be utilized.See Appendix X3 of Specifica-tion A 6/A 6M for information on weldability.1.4 For structural products to be used as tension componentsrequiring notch toughness testing,standardized requirementsare provided in this standard,and they are based uponAmerican Association of State Highway and TransportationOfficials(AASHTO)requirements for both fracture critical andnon-fracture critical members.1.5 Supplementary requirements are available but shallapply only if specified in the purchase order.1.6 The values stated in either inch-pound units or SI unitsare to be regarded separately as standard.Within the text,theSI units are shown in brackets.The values stated in eachsystem are not exact equivalents;therefore,each system is tobe used independently of the other,without combining valuesin any way.1.7 For structural products produced from coil and fur-nished without heat treatment or with stress relieving only,theadditional requirements,including additional testing require-ments and the reporting of additional test results,of Specifi-cation A 6/A 6M apply.2.Referenced Documents2.1 ASTM Standards:2A 6/A 6M Specification for General Requirements forRolled Structural Steel Bars,Plates,Shapes,and SheetPilingA 36/A 36M Specification for Carbon Structural SteelA 370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA 514/A 514M Specification for High-Yield-Strength,Quenched and Tempered Alloy Steel Plate,Suitable forWeldingA 572/A 572M Specification for High-Strength Low-AlloyColumbium-Vanadium Structural SteelA 588/A 588M Specification for High-Strength Low-AlloyStructural Steel with 50 ksi 345 MPa Minimum YieldPoint to 4 in.100 mm ThickA 673/A 673M Specification for Sampling Procedure forImpact Testing of Structural Steel1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel,and Related Alloys and is the direct responsibility of SubcommitteeA01.02 on Structural Steel for Bridges,Buildings,Rolling Stock,and Ships.Current edition approved March 15,2006.Published March 2006.Originallyapproved in 1974.Last previous edition approved in 2005 as A 709/A 709M 05.2For 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 Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.A 992/A 992M Specification for Structural Steel ShapesG 101 Guide for Estimating the Atmospheric CorrosionResistance of Low-Alloy Steels3.Terminology3.1 Definitions of Terms Specific to This Standard:TABLE 1Tensile and Hardness RequirementsANOTE1 Where“.”appears in this table,there is no requirement.GradePlate Thickness,in.mmStructural Shape Flangeor LegThickness,in.mmYield Pointor YieldStrength,BksiMPaTensileStrength,ksi MPaMinimum Elongation,%Reduc-tion ofAreaC,Dmin,%BrinellHard-nessNumberPlates and BarsC,EShapesE8 in.or 200mm2 in.or 50mm8 in.or 200mm2 in.or 50mm36 250to 4 100,inclto 3 in.75 mm,incl36 250 min5880 40055020232021.over 3 in.75 mm36 250 min58 400 min.2019.50 345to 4 100,inclall50 345 min65 450 min18211821F.50S 345SGall5065345450H65 450Hmin.1821.50W 345W andHPS 50WHPS 345Wto 4 100,inclall50 345 min70 485 min18211821I.HPS 70W HPS485 Wto 4 100,inclG70 485 minB85110 585760.19J.100 690,100W 690W,and HPS 100WHPS 690Wto 21265,inclG100 690 minB110130 760895.18J.K235293L100 690 and100W 690 Wover 212to4 65 to 100G90 620 minB100130 690895.16J.K.ASee specimen orientation and preparation subsection in the Tension Tests section of Specification A 6/A 6 M.BMeasured at 0.2%offset or 0.5%extension under load as described in Section 13 of Test Methods A 370.CElongation and reduction of area not required to be determined for floor plates.DFor plates wider than 24 in.600 mm,the reduction of area requirement,where applicable,is reduced by five percentage points.EFor 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 A 6/A 6M.FElongation in 2 in.or 50 mm:19%for shapes with flange thickness over 3 in.75 mm.GNot applicable.HThe 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.IFor wide flange shapes with flange thickness over 3 in.75 mm,elongation in 2 in.or 50 mm.of 18%minimum applies.JIf measured on the Fig.3(Test MethodsA 370)112in.40mm wide specimen,the elongation is determined in a 2-in.or 50-mm.gage length that includes the fractureand shows the greatest elongation.K40%minimum applies if measured on the Fig 3(Test MethodsA370)112in.40-mm wide specimen;50%minimum applies if measured on the Fig.4(Test MethodsA 370)12in.12.5-mm round specimen.LApplies only to Grades 100 690 and 100W 690W plates that are38in.10 mm or less in thickness and are not tension tested(See 8.1).TABLE 2Grade 36 250 Chemical Requirements(Heat Analysis)NOTE1 Where“.”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 Specification A 6/A 6M.ProductThickness,in.(mm)ShapesAAllPlatesBBarsBTo3420,inclOver34to 11220 to 40,inclOver 112to21240 to 65,inclOver 212to 465 to 100,inclTo3420,inclOver34to11220 to40,inclOver 112to4 100,inclCarbon,max,%0.260.250.250.260.270.260.270.28Manganese,%.0.801.200.801.200.851.20.0.600.900.600.90Phosphorus,max,%0.040.040.040.040.040.040.040.04Sulfur,max,%0.050.050.050.050.050.050.050.05Silicon,%0.40 max0.40 max0.40 max0.150.400.150.400.40 max0.40 max0.40 maxCopper,min,%whencopper steel is specified0.200.200.200.200.200.200.200.20AManganese 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.BFor 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 maximumof 1.35%.A 709/A 709M 0623.1.1 fracture critical membera main load-carrying ten-sion member or tension component of a bending memberwhose failure would be expected to cause collapse of astructure or bridge without multiple,redundant load paths.3.1.2 main load-carrying membera steel member de-signed to carry primary design loads,including dead,live,impact,and other loads.3.1.3 non-fracture critical membera main load-carryingmember whose failure would not be expected to cause collapseof a structure or bridge with multiple,redundant load paths.3.1.4 secondary membera steel member used for aligningand bracing of main load-carrying members,or for attachingutilities,signs,or other items to them,but not to directlysupport primary design loads3.1.5 tension componenta part or element of a fracturecritical or non-fracture critical member that is in tension undervarious design loadings.4.Ordering Requirements4.1 In addition to the items listed in the ordering informa-tion section of Specification A 6/A 6M,the following itemsshould be considered if applicable:4.1.1 Type of tension component,non-fracture critical orfracture critical(see Section 10).TABLE 3 Grade 50 345 Chemical RequirementsA(Heat Analysis)SiliconCColumbium,Vanadiumand NitrogenMaximum Diameter,Thickness,orDistance BetweenParallel Faces,in.mmCarbon,max,%Manganese,Bmax,%Phosphorus,max,%Sulfur,max,%Plates to112-in.40mm Thick,Shapes withflangeor legthicknessto 3 in.75mminclusive,SheetPiling,Bars,Zees,andRolledTees,max,%DPlates Over112in.40-mmThick and Shapeswith flange thicknessover 3 in.75 mm,%4 1000.231.350.040.050.400.150.40EACopper when specified shall have a minimum content of 0.20%by heat analysis(0.18%by product analysis).BManganese,minimum by heat analysis of 0.80%(0.75%by product analysis)shall be required for all plates over38in.10 mm in thickness;a minimum of 0.50%(0.45%by product analysis)shall be required for plates38in.10 mm and less in thickness,and for all other products.The manganese to carbon ratio shall not beless 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 1.50%.CSilicon content in excess of 0.40%by heat analysis must be negotiated.DBars over 112in.40 mm in diameter,thickness,or distance between parallel faces,shall be made by a killed steel practice.EAlloy content shall be in accordance with Type 1,2,3,or 5 and the contents of the applicable elements shall be reported on the test report.TypeElementsHeat Analysis,%1ColumbiumA0.0050.05B2Vanadium0.010.153ColumbiumAVanadiumColumbium plus vanadium0.0050.05B0.010.150.020.15C5TitaniumNitrogenVanadium0.0060.040.0030.0150.06 maxAColumbium shall be restricted to Grade 50 345 plate,bar,zee,and rolled tee thickness of34in.20 mm max,and to shapes with flange or leg thickness to 112in.40 mm inclusive unless killed steel if 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 as silicon at 0.10%or higher,or aluminum at 0.015%or higher.BProduct analysis limits=0.004 to 0.06%.CProduct analysis limits=0.01 to 0.16%TABLE 4Grade 50W 345 W Chemical Requirements(HeatAnalysis)NOTE1Types A,B,and C are equivalent to Specification A 588/A 588M Grades A,B,and C,respectively.ElementComposition,%AType AType BType CCarbonB0.19 max0.20 max0.15 maxManganeseB0.801.250.751.350.801.35Phosphorus0.04 max0.04 max0.04 maxSulfur0.05 max0.05 max0.05 maxSilicon0.300.650.150.500.150.40Nickel0.40 max0.50 max0.250.50Chromium0.400.650.400.700.300.50Copper0.250.400.200.400.200.50Vanadium0.020.100.010.100.010.10AWeldability data for these types have been qualified by FHWAfor use in bridgeconstruction.BFor 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%.A 709/A 709M 0634.2 Impact testing temperature zone(see Table 8).5.General Requirements for Delivery5.1 Structural products furnished under this specificationshall conform to the requirements of the current edition ofSpecification A 6/A 6M,for the specific structural productordered,unless a conflict exists in which case this specificationshall prevail.5.2 Coils are excluded from qualification to this specifica-tion until they are processed into a finished structural product.Structural products produced from coil means structural prod-ucts that have been cut to individual lengths from a coil.Theprocessor directly controls,or is responsible for,the operationsinvolved in the processing of a coil into a finished structuralproduct.Such operations include decoiling,leveling orstraightening,hot-forming or cold-forming(if applicable),cutting to length,testing,inspection,conditioning,heat treat-ment(if applicable),packaging,marking,loading for shipment,and certification.NOTE1For structural products produced from coil and furnishedwithout heat treatment or with stress relieving only,two test results are tobe reported for each qualifying coil.Additional requirements regardingstructural products produced from coil are described in SpecificationA 6/A 6M.TABLE 5Grade 100 690 and 100W 690W Chemical Requirements(Heat Analysis)NOTE1 Where“.”appears in this table there is no requirement.NOTE2Types A,B,C,E,F,H,J,M,P,and Q are equivalent to Specification A 514/A 514M Grades A,B,C,E,F,H,J,M,P,and Q,respectively.Type A,%Type B,%Type C,%Type EA,%Type FA,%Type H,%Type J,%Type M,%Type PA,%Type QA,%MaximumThickness,in.mm1143211432114324100212652501143225041004100Carbon0.150.210.120.210.100.200.120.200.100.200.120.210.120.210.120.210.120.210.140.21Manganese0.801.100.701.001.101.500.400.700.601.000.951.300.450.700.450.700.450.700.951.30Phosphorus,0.0350.0350.0350.0350.0350.0350.0350.0350.0350.035maxSulfur,max0.0350.0350.0350.0350.0350.0350.0350.0350.0350.035Silicon0.400.800.200.350.150.300.200.400.150.350.200.350.200.350.200.350.200.350.150.35Nickel.0.701.000.300.70.1.201.501.201.501.201.50Chromium0.500.800.400.65.1.402.000.400.650.400.65.0.851.201.001.50Molybdenum0.180.280.150.250.150.300.400.600.400.600.200.300.500.650.450.600.450.600.400.60Vanadium.0.030.08.B0.030.080.030.08.0.030.08Titanium.0.010.03.0.010.10.Zirconium0.050.15C.Copper.0.150.50.Boron0.0025max0.00050.005 0.0010.0050.0010.0050.00050.006 0.00050.005 0.0010.0050.0010.0050.0010.005.ATypes E,F,P,and Q meet the requirements of atmospheric corrosion resistance in accordance with 11.1.2.BMay be substituted for part or all of titanium content on a one for one basis.CZirconium may be replaced by cerium.When cerium is added,the cerium/sulfur ratio should be approximately 1.5 to 1,based upon heat analysis.TABLE 6Grades HPS 50W HPS 345W and HPS 70WHPS 485 W,and HPS 100W HPS 690W Chemical Requirements(Heat Analysis)NOTE1 Where“.”appears in this table,there is no requirement.ElementC