Abstract: A color coating layer is formed on the surface of a stainless steel plate by a chemical coloring method or an electrolytic coloring method. Thereafter, a colored stainless steel plate having the color coating layer is cold-rolled, the thickness of the color coating layer is adjusted to between 0.05 ?m and 1.0 ?m, and an entire plate thickness is adjusted to 0.5 mm or less. By the cold rolling a Vickers hardness Hv is between 250 and 550 to form a deformed band. As surface roughness, an arithmetic average roughness Ra is adjusted to between 0.05 ?m and 5.0 ?m. In this manner, the strength and rigidity of a thin colored stainless steel plate can be secured, and a color stainless steel plate and a colored stainless steel coil which do not easily cause galling and are excellent in press moldability can be obtained.

Abstract: A stainless steel plate for press forming includes a stainless steel having a recess formed along grain boundaries on a base surface of the stainless steel; and a surface film that is formed on a surface of the stainless steel that includes the recess, that is composed of at least one of an Fe and Cr-based oxide film and an Fe and Cr-based hydroxide film, and that has a thickness of equal to or greater than 0.1 ?m and equal to or less than 3.0 ?m, wherein a groove is formed correspondingly to the recess on the surface side of the stainless steel. The stainless steel plate has superior galling resistance and press formability during press forming even if general-purpose stainless steel and an extreme pressure additive, such as a non-chlorine-based additive, or a low viscosity press oil are used.

Abstract: In press molding, a colored stainless steel plate and a colored stainless steel coil which are excellent in galling resistance and moldability and have high strength in molded articles, and a method of manufacturing the same. A color coating layer 11 is formed on the surface of a stainless steel plate 10 by a chemical coloring method or an electrolytic coloring method. Thereafter, a colored stainless steel plate 1 having the color coating layer is cold-rolled, the thickness of the color coating layer 11 is adjusted to 0.05 ?m or more to 1.0 ?m or less, and an entire plate thickness is adjusted to 0.5 mm or less. By the cold rolling a Vickers hardness Hv is 250 or more to 550 or less to form a deformed band 5. As surface roughness, an arithmetic average roughness Ra is adjusted to 0.05 ?m or more to 5.0 ?m or less.

Abstract: Provided is a stainless steel plate having superior galling resistance and press formability during press forming even using general-purpose stainless steel and using an extreme pressure additive, such as a non-chlorine-based additive, and low viscosity press oil. On one main surface of the stainless steel, a cross-sectional triangular-shaped depression is formed along a grain boundary exposed on a base surface of the stainless steel. A surface coating is formed on the one main surface of the stainless steel, which contains the surface of the depression. The surface film is an oxide and/or a hydroxide with Fe and Cr as main components, and the surface film has a thickness of 0.1-3.0 ?m. Furthermore, this surface film contains an atomic percent of Cr of 10% or greater with the remainder being substantially Fe and has an oxide coating and/or hydroxide coating with a thickness of 0.1-3.0 ?m.