Standard: GB/T 8162 Grade: 10, 20, 35, 45, Q345, 40Mn2,45Mn2,27SiMn, ... : 6-660 mm Length:39.34'/12M.max Standard: GB/T 8162Grade: 10, 20, 35, 45, Q345, 40Mn2, 45Mn2,27SiMn, 40MnB ... , Mr.Surn ShuMarketing DirectorBeijing Topensea International Co., LtdT: 86-10-69243766 /69252311F: 86-10-69298861 TOPENSEA... Supplying the best... with the best ...