The rolling method of cold drawn (rolled) thick-walled seamless steel pipe is more complicated than that of hot-rolled (extruded thick-walled seamless steel pipe). Large-caliber boiler tubes have a hollow section and their length is much longer than the diameter or circumference of steel.According t

10# seamless steel pipe mechanical properties:Tensile strength σb (MPa): ≥410 (42) Yield strength σs (MPa): ≥245 (25) elongation δ5 (%): ≥25 shrinkage rate ψ (%): ≥5, hardness: unheated ,≤156HB, sample size: sample size 25mm　　10# Seamless steel pipe instructions　　 Used in various fields such as auto