... round bar 1.Factory direct price 2.Garde:Q235,SS400,SAE1018,SAE1045,etc. 3.Free sample&small order is ok Mild steel carbon round bar ... specificationOuter Diameter:3.5mm-300mmStandardGB,JIS,DIN,AISI,ASTMCertificateISO9001-2008 Material10#,20#,45#,Q195,Q235B ,SS400,ASTM A36,S235JR,St37-2 ...