Patent ID: 11098393

Abstract:
There are provided a very thin martensitic stainless steel foil and a manufacturing method thereof, which are capable of reducing shape defects and the like. A martensitic stainless steel foil of the present invention has a thickness of at most 35 μm, and having a steepness of at most 0.75% when the steel foil has a length of 650 mm. Preferably, a metallographic structure in a cross-section of the steel foil is a ferrite structure, in which carbides are dispersed. More preferably, the steel foil consisting of, by mass, 0.25% to 1.5% C, 10% to 18% Cr, at most 1.0% Si (exclusive of 0%), at most 1.5% Mn (exclusive of 0%), at most 3.0% Mo (inclusive of 0%), and the balance of Fe with inevitable impurities.