Features:
1)Specification: from 50*50 to 400*400
2)Thickness:2-12mm
3)Longness:6-16m
4)Trademark:Q235,Q345,Q195
5)Form of welding line: straight sew
6)Production techniques: resistance welding
7)Port of tube: without screw thread





























































































































































































































































































































































steel grade:Q195 Q235 Q345 Mn16 ASTM500A,B,C thickness:2---12mm 50*50---400*400