Forging Parts, Industrial Machinery Parts, Casting & Forging manufacturer / supplier in China, offering DIN1629 1630 Cold Drawn Seamless Steel Tube Precision ASTM Standard Carbon Steel Grade (Q235) for Welding Cutting Bending, High Pressure Diesel Engine Fuel Injection Seamless Steel Tube DIN2391 Compliant, En10305 Precision Carbon Steel Cold Rolled Tube Q235 Grade for Drill Pipe Welding Cutting Certified GS and so on.