... carbon steel hot rolled carbon round steel 1Factory price 2Small order&customize 3Fast delivery time Structural carbon steel hot rolled carbon round steel(Q235 Q235B Q345 Q345B ASTM ... 2008 Material10#,20#,45#,Q195,Q235B ,SS400,ASTM A36,S235JR,St37-2,Q345B,S355JR,etc.ApplicationA ... , chemical, paper, fertilizer, Fabric, aviation and nuclear)B) Fluid, gas and oil transportC) Pressure and heat ...