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1、MaterialSpecificationGMW3032MetalsHighStrengthSheetSteel(180MPa...550MPaYieldStrengths)1Scope1.1MaterialDescription.ThematerialdesignationisdefinedbytheGMWbasemetalspecificationnum-Thisspecificationcoverstherequirementsforcontin-ber,steelproducttype,minimumy
2、ieldstrength,anduouscastsheetsteelwithspecifiedminimumyieldfinishtype.Thesteelproducttypeisdesignatedbystrengthsfrom180MPathrough550MPaapplicableCRforcoldrolledproducts,orHRforhotrolledprod-touncoatedandcoated,coldorhotrolledlowcarbon,ucts.Anumeral(180,210,2
3、40,270,300,etc.)willsolidsolutionstrengthened,bake-hardenable,highdesignatetheminimumyieldstrengthlevelinmega-strengthlowalloy,ordualphasesubstrateswithgoodpascals(MPa).Adesignationofsteeltype(i.e.P,formability.Continuouslyhotorcoldrolledflatprod-B2,B0,DP)sh
4、allbeaddedtobakehardenable(B0uctsshallbesuppliedascoilsorsheet.HotrolledflatandB2)andsolidsolutionstrengthened(P)anddualproductsareusuallysuppliedinthicknessesgreaterphase(DP)gradesasshowninparagraph7).Thethan1.75mm.Theseflatproductsareusedforcoldsteelgrades
5、willcorrespondtothechemicalandme-formingandformanufacturingofweldedtubes.ColdchanicalrequirementsasshowninTable1,Table2,rolledflatproductswiththeappropriatesurfacetypeTable3,Table4,Table5,Table6andTable7.Theandsurfacefinisharesuitablefortheapplicationoffinis
6、htype,analphacharacter,willdesignatethefin-surfacecoatings(metallichotdipping,electrolyticalishasE(exposed),orU(unexposed).Theabovede-plating,hotspraypainting,organiccoatingsand/orscriptiveitemsareusedtogethertoformthecodingothercoatings).Thisspecificationdo
7、esnotap-system.Examplesofthecodingsystemforengineer-plytosteelforcasehardeningandcoldreduced,ingpartdrawingsandmanufacturingengineeringdoc-workhardenedstrips.Additionalrequirementsorumentsareshowninparagraph7.agreementshavetobespecifiedbyregionalGMAutomotive
8、Operations(GMAO)businessunits.[e.g.,1.1.1MaterialIdentification.NorthAmerica(NA),Europe(E),LatinAmerica(LA),andAsiaPacific(AP)].1.1.1.1MaterialIdentification:SolidSolutionStrengthenedandBakeHard