MARTENSITIC STAINLESS STEEL SUPERIOR IN DUCTILITY AND STAINLESS STEEL PIPE FOR OIL WELL

摘要

PROBLEM TO BE SOLVED: To provide martensitic stainless steel superior in ductility and a stainless steel pipe made from this stainless steel.;SOLUTION: The martensitic stainless steel superior in ductility comprises including 10-14% Cr, 0.001-0.050% Al, 0.0001-0.030% Ca by mass%, and satisfying the following expression when defining Lmax (μm) to be a maximum length of inclusions and Al% and Ca% to be contents of Al and Ca included in the martensitic stainless steel. Lmax+1200. (Al%+10.Ca%)≤120.;COPYRIGHT: (C)2002,JPO