gal square steel pipe tube 1 Size: OD, 18-120mm ... steel 3 Annealed cold drawn Annealing Cold Drawn Seamless gal square steel pipe tube Specification & Commodity1. Standard: ASTM A ... 501, ASTM A519, ASTM A106, ASTM A53, GB/T 8162, GB/T8163......2. Material: 10#, 20#, 1020, C22, ... 1045, C45, 1010, CK10, Q195, Q235, Q345B, S185, S235JR, E235B......3 ...