Alloy pipe

  High strength cylinder pipe has high strength & tenacity, brittle fracture resistance and good weldability. S700 and S890 high strength cylinder pipes also have good hardenability and uniform performance after heat treatment. They are especially suitable for manufacturing high strength cylinders with large OD, medium & large wall thickness. Application Fields High strength cylinder pipe are mainly used for hydraulic support of coal collection face, hydraulic cylinder, engineering machinery, ship lock and offshore platform etc. Production Range OD: 42mm-760mm WT: 4mm-120mm Standard and Steel Grade GB/T 8162 GB/T 8163 GB/T 17396 or technical agreement. Requirements for Mechanical Properties Steel Grade Delivery Condition Tensile Yield Elongation R.A. Absorbed-engergy (MPa) (MPa) (%) (%) (J) Not Less Than 27SiMn Quenching+Tempering 980 835 12 40 20℃(AKU2) 39 30CrMnSiA Quenching+Tempering 1080 835 10 35 20℃(AKU2) 39 30CrMoA Quenching+Tempering 930 735 12 50 20℃(AKU2) 71 20MnT...