Mild steel carbon round bar 1.Factory direct price 2.Garde:Q235,SS400,SAE1018,SAE1045,etc. 3.Free sample& ... Material10#,20#,45#,Q195,Q235B ,SS400,ASTM A36,S235JR,St37-2,Q345B,S355JR,etc.ApplicationA) General service industries (petroleum, food, ... chemical, paper, fertilizer, Fabric, aviation and nuclear)B) Fluid, gas and oil transportC) Pressure and heat transmissionD) Construction and ornamentE ...