Q235B Square Steel Pipe
Seamless Square Pipes - Square tubes are categorized by material: Carbon Steel Square Tubes, Low-Alloy Square Tubes.
1. Carbon steel is categorized into: Q195, Q215, Q235, SS400, 20# steel, 45# steel, etc.
2. Low-alloy steel includes: Q345, 16Mn, Q390, ST52-3, etc.
































