1、AMERICAN NATIONALANSI/ASTM A 441-79American Association StateSTANDARDHighway and Transportation Officials StandardAASHTO No.:M 188Standard Specification forHIGH-STRENGTH LOW-ALLOY STRUCTURALMANGANESE VANADIUM STEEL1This Standard is issued under the fixed designation A 441;the number immediately foll
2、owing the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year oflast reapproval.This specification has been approved for use by agencies of the Department of Defense and for listing in the DoD Indexof Spec
3、ifications and Standards.1.Scope4.Chemical Requirements1.1 This specification covers high-strength4.1 The heat analysis shall conform to thelow alloy structural steel shapes,plates,andrequirements prescribed in Table 1.bars for welded,riveted,or bolted construc-4.2 The steel shall conform on product
4、tion but intended primarily for use in weldedanalysis to the requirements prescribed inbridges and buildings where saving in weightTable 1,subject to the product analysis toler-or added durability are important.The atmos-ances in Specification A 6.pheric corrosion resistance of this steel is ap-prox
5、imately twice that of structural carbon5.Tensile Requirementssteel.This specification is limited to material5.1 The material as represented by the testup to 8 in.(203 mm)incl.in thickness.specimens shall conform to the tensile proper-NoTE 1-The values stated in inch-pound unitsties prescribed in Tab
6、le 2.are to be regarded as the standard.5.2 For material under in.(7.94 mm)inthickness or diameter,as represented by the2.General Requirements for Deliverytest specimen,a deduction of 1.25%from the2.1 Material furnished under this specifica-percentage of elongation in 8 in.or 200 mmtion shall confor
7、m to the applicable require-specified in Table 2 shall be made for eachments of the current edition of Specificationdecrease of 2 in.(0.79 mm)of the specifiedA 6 for General Requirements for Rolledthickness or diameter below 5 in.Steel Plates,Shapes,Sheet Piling,and Barsfor Structural Use.2This spec
8、ification is under the jurisdiction of ASTMCommittee A-1 on Steel,Stainless Steel and Related Alloys.and is the direct responsibility of Subcommittee A01.02 on3.ProcessStructural Steel for Bridges,Buildings.Rolling Stock,andShips.3.1 The steel shall be made by one or moreCurrent edition approved Nov
9、.5,1979.Published Januaryof the following processes:open-hearth,basic-1980.Originally published as A 441-60T.Last previousedition A 441-77.oxygen,or electric-furnace.Annual Book of ASTM Standards,Part 4.SUPPLEMENTARY REQUIREMENTSStandardized supplementary requirements for use at the option of the pu
10、rchaserare listed in Specification A 6.Those which are considered suitable for use with thisspecification are listed below by title.S14.Bend Test.S18.Maximum Tensile Strength.3935bA441.vTABLE 1Chemical RequirementsHeat Analysis,%Carbon,max0.22Manganese0.85-1.25Phosphorus,max0.04Sulfur,max0.05Silicon
11、,max0.40Copper,min0.20Vanadium,min0.02TABLE 2 Tensile RequirementsPlates and BarsStructural ShapesForForForForThicknessesThicknessesThicknessesThicknesses3 inover toover 1 toover 4 to 8.GroupsGroup 3Groups4 and 5(19mm)1in.(i94in.(38in.(102and underto 38 mm),to 102 mm),to 203 mm)inclinclTensilestreng
12、th 70 000(485)67000(460)63000(435)60000(415)70000(485)67000(460)63000(435)min,psi(MPa)eYield point min,psi50 000(345)46000(315)42000(290)40000(275)50000(345)46000(315)y42000(290)(MPa)Elongation in 8 in.18d,e118e./18e,i1841818or 200 mm,min,Elongation in 2 in.21e,2112l/218or 50 mm,min,For plates wider
13、 than24 in.(610 mm),the test specimen is taken in the transverse direction.See 11.2 of SpecificationA6.See Specification A 6,Table A.When the material is normalized the minimum yield point and minimum tensile strength required shall be.reduced5000psi(35MPa).r4 See 5.2.e Elongation not required to be
14、 determined for floor plate./For plates wider than 24 in.(610 mm),the elongation requirement is reduced two percentage points.For wide flange shapes over 426 Ib/ft elongation in 2 in.or 50 mm of 19%minimum applies.The American Society for Tesiing and Materials takes no position respecting the validi
15、ty of any patent rights assertedin connection with any item mentioned in this standard.Users of this standard are expressly advised that determinationof the validity of any such patent rights,and the risk of infringement of such rights,is entirely their own responsibility.This standard is subject to
16、 revision at any time by the responsible technical committee and must be reviewed every fiveyears and if not revised,either reapproved or withdrawn.Your comments are invited either for revision of this standard orfor additional standards and.should be addressed to ASTM Headquarters.Your comments wil
17、l receive careful considerationat a meeting of the responsible technical committee,which you may attend.If you feel that your comments have not recciveda fair hearing you should make your views known to the ASTM Committee on Standards,1916 Race St.,Philadelphia,Pa.19103,which will.schedule a further hearing regarding your comments.Failing satisfaction there,you may appeal to theASTM Board of Directors.394
