Patent ID: 6440234
Filing Date: 2002-08-27
Classification: C21D,Y10S

Abstract:
A martensitic stainless steel product having a chromium content of 9 to 15% by weight and a surface from which mill scales are removed by a shot blasting, the surface having a roughness having a maximum height Ry of not more than 80 &mgr;m and the surface satisfying an inequality, 75000&gE;800Xpâˆ’Ypâˆ’27000>0, at an analysis of blue color in a color image of the surface taken with 640Ã—480 pixels, wherein Yp represents the maximum frequency in a histogram of the pixel numbers and the tones divided into 0 to 255 classes and Xp represents the tone value at which Yp is counted.