JISG3445JISG3445JISG3445JISG3445日本标准日本标准日本标准日本标准((((机械管机械管机械管机械管))))标准标准标准标准::::JISG3445用途用途用途用途::::适用于机械、汽车、自行车、家具、器具及其他机械零件用碳素钢管主要生产钢管牌号主要生产钢管牌号主要生产钢管牌号主要生产钢管牌号::::STKM11A、STKM12(A,B,C)、STKM13(A,B,C)、STKM14(A,B,C)化学成分化学成分化学成分化学成分::::钢级Standard牌号SteelGrade化学成分ChemicalComposition(%)CSiMnPSJISG3445STKM11A≤0.12≤0.35≤0.60≤0.040≤0.040STKM12A≤0.20≤0.35≤0.60≤0.040≤0.040STKM12BSTKM12CSTKM13A≤0.25≤0.350.30-0.90≤0.040≤0.040STKM13BSTKM13CSTKM14A≤0.30≤0.350.30-1.00≤0.040≤0.040STKM14BSTKM14C机械性能机械性能机械性能机械性能::::标准Standard牌号SteelGrade机械性能Mechanicalproperties抗拉强度(Mpa)TensileStrength屈服强度(Mpa)YieldStrength伸长率(%)ElongationJISG3445STKM11A≥295\≥35STKM12A≥345≥175≥35STKM12B≥390≥275≥25STKM12C≥470≥355≥20STKM13A≥375≥215≥30STKM13B≥440≥305≥20STKM13C≥510≥380≥15STKM14A≥410≥245≥25STKM14B≥500≥355≥15STKM14C≥550≥410≥15RemarksRemarksRemarksRemarks备注备注备注备注::::HR:hotrolledCW:coldworked冷拔SR:stressrelieved去除应力A:annealed退火N:normalized正火HF:热轧