《碳素结构钢》(GB700—88)标准

(GB70088)(100730)(GB700-88)(GB70088)ACOMPILATIONSUMMARYOFCARBONSTRUCTURALSTEEL(GB70088)Tangyifan(InformationStandardInstituteofMinistryofMetallurgicalIndustryBeijing100730)ABSTRACTThispaperhighlightsthenecessityofrevisingCarbonStructuralSteel(GB700-88)introducestherevisedstandardsandgivesareviewThecontentofMnisraisedandthecontentsofC,PandSaredecreasedusingtheinternationaladvancedstandardsandtheforeigntechnicallineThedifferentchemicalcompositionandperformanceindexarespecifiedaccordingt0differentqualityclassificationswhichcanmeetthedevelopmentmarketeconomyTheyieldpoint,qualitygradeanddeoxidationareusedtoexpressthebrandsOfsteelswhichreflectsthefeaturesOfengineeringstructuralsteelsThenewstandardsarealsofavorablefortechnicalexchangeinternationallyforChinasproductstoenterinternationalmarketKEYWORDScarbonstructuralsteelstandardrevision7519793()()1987IS06301987(GB70088)lGB70088Q235CDPS0.040.035GB7004(1)567Q275(2)CMnPSC0.22C0.25(3)(4)()()()100mm20mm40mm()200mmISO2ISONFss3Q235ABCD(CMnPS)FbZTZZTZCDQ235Q235-AQ235AQ235-A-FQ235ABA3O780197819797()GB7008865Q195Q215Q235Q255Q27515612(Ol95Q2l5)350(s)16MnIS0630E355DINl7100StS21.8DINNFE275(St44)E23S(St37)(Q235)E355(St52)(Q345)45CMnMnCMnC(C+1/6Mn)Ps0235Q235ABCDC0.22,0.20,0.18O.17Mn0.65O.70,0.80PS0.0450.0500.0450.045,0.0400.040O.0350.035()MnMnCB0.05CD0.15CMnMnMnC2.5CD70MnMnQ235MnO60CPSISONFDPSDINJISASTMMn1.41.0MnCDMnIS0630CMnSiPSABCDACMnSi()IS0630AMnSiCMnASiSiSiALDALSiSiDALAl0.015AL0.02CrNiCuAsISOCrNiCuO.30As0.08AsAsO.15CuO.350.008OCT()0.0125ABCD5.1Q235ABCDABCOD20CDQ215Q255ABQ195Q27515Q2755.216166060100100150150200mmIS063060100mmISODINJIS316l64040mmOCT20204040lO0100mmNF33303050508080110110150mm3030100mm,60100mm5.3s510MPal60100mmISODINs510MPa1Q1951lsls40mm()1()4mmGB9125.4Q235120N,ISODIN130Nl10N100NBCD5.519793Q235d=1.5a3d=a2=0.5a3d=O.5a12d=O20mm20mmDINl71006060100100(mm)360mmaaBCDAbIS0630?5.6VBCDIS0630O-2027J-20-40-40E-4027J10mm10mm55mm.612mm1216mm5mm10mm55mm50%7.5mm10mm55mm,3170%36270%1370%3630t30tGB700-88