ASTM_A_936_-_A_936M_-_97a.pdf

Designation:A 936/A 936M 97aStandard Specification forSteel,Sheet and Strip,Heavy Thickness Coils,HighStrength,Low-Alloy,Hot-Rolled,with Improved Formability1This standard is issued under the fixed designationA936/A936M;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.Scope1.1 This specification covers heavy thickness high-strength,low-alloy hot-rolled sheet and strip,in coils beyond the sizelimits of Specification A 715.The product has improvedformability when compared with steels covered by Specifica-tion A 935/A 935M.The product is furnished only as coils andis available in four-strength levels,Grades 50,60,70 and 80(345,415,485,550)(corresponding to minimum yield strength(see Table 1).The steel is killed,made to a fine grain practice,and includes microalloying elements such as columbium,titanium,vanadium,zirconium,etc.The steel may be treated toachieve inclusion control.The product is intended for miscel-laneous applications where higher strength,savings in weight,improved formability,and weldability are important.Atmo-spheric corrosion resistance of these steels is equivalent toplain carbon steels.With copper specified,the atmosphericcorrosion resistance is somewhat enhanced.NOTE1For methods of establishing the atmospheric corrosion resis-tance of low-alloy steels,see Guide G 101.1.1.1 This material is available only in coils described asfollows:Size Limits,Coils OnlyProductWidth,in.(mm)Thickness,in.(mm)StripOver 8 to 12 incl(Over200 to 300)0.230 to 1.000 incl(Over 6.0 to 25)SheetOver 12 to 48(Over 300to 1200)0.230 to 1.000 incl(Over 6.0 to 25)Over 48(Over 1200)0.180 to 1.000 incl(Over 4.5 to 25)1.2 Sheet and strip in coils of sizes noted in 1.1 can beincluded in this specification only with the following:1.2.1 The material is not to be converted into steel plates forstructural or pressure vessel use unless tested in completeaccordance with the appropriate sections of SpecificationsA 6/A 6M(plates provided from coils)or A 20/A 20M(platesproduced from coils).1.2.2 This specification is not applicable to the steelscovered by Specification A 635/A 635M.1.2.3 The dimensional tolerances of Specification A 635/A 635M are applicable to material produced to this specifica-tion.1.2.4 The material is to be fed directly from coils into ablanking press,drawing or forming operation,tube mill,rollingmill,or sheared or slit into blanks for subsequent drawing orforming.1.2.5 Not all strength levels are available in all thicknesses.The user should consult the producer for appropriate sizelimitations.1.3 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 mustbe used independently of the other.Combining values from thetwo systems may result in nonconformance with the specifi-cation.2.Referenced Documents2.1 ASTM Standards:A 370 Test Methods and Definitions for Mechanical Testingof Steel Products2A 635/A635M Specification for Steel,Sheet and Strip,Heavy-Thickness Coils,Carbon,Hot-Rolled21This specification is under the jurisdiction of ASTM Committee A-1 on Steel,Stainless Steel,and Related Alloys and is under the direct responsibility ofSubcommittee A01.19 on Steel Sheet and Strip.Current edition approved March 10 and June 10,1997.Published November1997.Originally published as A 936/A 936M-95.Last previous edition A 936/A 936M-95.2Annual Book of ASTM Standards,Vol 01.03.TABLE 1Tensile RequirementsAGrade 50Grade 60Grade 70Grade 80Tensile strength,min,ksi(MPa)60(415)70(485)80(550)90(620)Yield strength,min,ksi(MPa)50(345)60(415)70(485)80(550)Elongation in 2 in.(50 mm),min,%,forthicknesses to 0.750 in.(19 mm)incl.22.016.012.012.0Elongation in 8 in.(200 mm),min%,for thicknesses 0.180 in.(4.5 mm)to 0.750 in.(19 mm)incl.16.014.010.010.0AFor coil products,testing by the producer is limited to the end of the coil.Results of such tests must comply with the specified values.Tensile propertiesthroughout the balance of the coil must not be less than 90%of the minimumvalues specified.1Copyright ASTM,100 Barr Harbor Drive,West Conshohocken,PA 19428-2959,United States.NOTICE:This standard has either been superseded and replaced by a new version or discontinued.Contact ASTM International(www.astm.org)for the latest information.A 715 Specification for Steel Sheet and Strip,High-Strength,Low-Alloy,Hot-Rolled,and Steel Sheet,Cold-Rolled,High-Strength,Low-Alloy with Improved Form-ability2A 751 Test Methods,Practices,and Terminology forChemical Analysis of Steel Products2A 935/A935M Specification for Steel,Sheet and Strip,Heavy Thickness Coils,High Strength,Low-Alloy,Columbium or Vanadium,or Both,Hot-Rolled2E 29 Practice for U