The tubular product for petrolu00ecferos fields of stainless steel martensu00ectico

摘要

The tubular product to the oil fields of stainless steel martensu00ectico.The present invention relates to a tubular product to the oil fields of martensitic stainless steel, which contains, by weight, 0.005% to 0.1% C, 0.05% to 1%, 1.5% and 5% of Mn, maximum 0.05% of P, in the maximum 0,01% of s 9% to 13% Cr, not more than 0,5% Ni, at most 2% Mo, More than 2% Cu, 0.001% to 0.1%. And 0.001% to 0.1% of N, with the balance being Fe and impurities.And the tube has an empty region of Cr in the surface. The tubular product to the oil fields of martensitic stainless steel according to the present invention is not a passive film on the surface and erodes completely at low speed. In addition, the content of Ni is reduced, which allows an uneven corrosion is avoided.Therefore, you can avoid the generation of SCC despite the presence of an empty region of Cr.