gal square steel pipe tube 1 Size: OD, 18-120mm WT, 1.2-18mm 2 Material, low carbon steel 3 Annealed cold drawn Annealing ... Cold Drawn Seamless gal square steel pipe tube Specification & Commodity1. Standard: ASTM A 501, ASTM A519, ... ......2. Material: 10#, 20#, 1020, C22, 1045, C45, 1010, CK10, Q195, Q235, Q345B, S185, S235JR, E235B......3. SizesOD: 18-120mmWT: 1 ...