steel solid round bar 1.diameter:10-400mm 2.length:6m-12m 3.material:SAE1045,C45,Q235 steel solid round bar DescriptionCarbon structure steel/carbon steel round bar/flat bar/carbon steel plate/sheetGradeGB Q255/JIS SS490/DIN S275J0/ASTM 1025Chemical CompositionCSiMnSPCrNi0.18-0.28≤0.30.4-0.70.03(max)0.03(max)0.2(max)0.2(max)StandardGB,JIS,ASTM,DIN,AISI,BSMechanical performanceYield point≥ ...