Square steel pipe 10#,20#,45#,16Mn, ASTM A106 Gr.B, ASTM ... 52, Q 235, Q 195, Q345, 27SiMn Square steel pipe ProductionSquare steel pipeBrandXin hai fengSpecification20mm×40mm--250×250mm Thickness: 2.3mm--8mmOut ... clients reqestments.Supply1. seamless steel pipe2. ERW steel pipe3. steel casing4. tubing5. hot-rolled steel pipe6. spiral steel pipe7. hot-galvanized steel pipe Specification (mm)Thickness( ...