Stainless Steel seamless pipe High Strength Tubular Products of the oil industry, and Method for Manufacturing Stainless Steel seamless pipe with high strength

摘要

Provides a seamless Stainless Steel Tube High Strength Tubular Products in the oil industry, which has High Strength,Excellent Low Temperature toughness and excellent corrosion Resistance even when the Steel Tube has a Wall thickness significantly.Stainless Steel seamless pipe with high strength has a composition (Mass percentage) contains the following components in the following quantities: C: 005% or less; if: 1.0% or less; MN: from 0.1 to 0.5%; P: 0.05% or less; S: less than 0.005%; RR: from 15.0% to 19.0% more or less; mo: from 2.0% to 3.0% or less; cu: from 0,3 to 3.5 per cent; and from more to less than 3.0% and 5.0%; W: from 0.1 to 3.0%; NB: from 0.07 to 0.5%; V: from 0.01 to 0.5%; The: from 0.001 to 0.1%; n: since until 0100 0010: 0%; or,01% or less; and fe and inevitable impurities such as balance. NB, ta, C, N and cu satisfy a specified formula.The Steel Tube has a microstructure consisting of 45% or more of a Tempered martensite Phase from 20 to 40% of a ferrite phase.And for more than 10% to 25% or less of a phase of residual austenite in terms of Volume.