The world class q345b steel sheet for building decoration 7mm c45 st52 fire rating heat resistant shipbuilding plate
China Mill Factory (ASTM A36, SS400, S235, S355, St37, St52, Q235B, Q345B) Hot Rolled Ms Mild Carbon Steel Plate for Building Material and Construction. China Hot Rolled Steel Plate ASTM A572 Grade 50/Q345b 7mm c45 st52 fire rating heat resistant shipbuilding plate
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supply gb t 4171 q295nh weather steel for container