steel price per ton ship building steel plate Product nameSteel gradeSpecification O.D X W.T mmExecutive standardCarbon Structural SteelQ195,Q235B,Q235C,Q275B,Q275C,10,15,20,25,30,40,45,08,08AL,20Mn,50Mn,SS400, SM400A,SM400B,S10C,S20C,S55C,St37-2,St37- 3,A36,A283A,A283B,A283C,A283D,1010,1050,40A,40B,40C,40D,40EE,S235JR,S235J0,S235J..