Abstract: A rolled stainless steel object has surface with a raised and indented pattern including a random juxtaposition of at least two types of polygons. Each of the polygons has at least three sides, and is made up of substantially parallel rectilinear scratches, having a depth of from 5 to 30 ?m separated by ridge lines, the axes of which are from 0.1 to 0.3 mm from each other, and a Fourier transform spectral analysis of which, carried out on a square of at least 100 mm2, shows that they have an isotropy of at least 40% between the rolling direction and the sideways direction, and two adjacent preferred angular orientations of which scratches, from among the three main preferred angular orientations thereof, are spaced apart by a minimum of 20° and a maximum of 60°.

Abstract: A rolled stainless steel object has surface with a raised and indented pattern including a random juxtaposition of at least two types of polygons. Each of the polygons has at least three sides, and is made up of substantially parallel rectilinear scratches, having a depth of from 5 to 30 ?m separated by ridge lines, the axes of which are from 0.1 to 0.3 mm from each other, and a Fourier transform spectral analysis of which, carried out on a square of at least 100 mm2, shows that they have an isotropy of at least 40% between the rolling direction and the sideways direction, and two adjacent preferred angular orientations of which scratches, from among the three main preferred angular orientations thereof, are spaced apart by a minimum of 20° and a maximum of 60°.

Abstract: Martensitic stainless steel, characterized in that its composition consists of, in percentages by weight: 0.10%?C?0.45%; traces?Mn?1.0%; traces?Si?1.0%; traces?S?0.01%; traces?P?0.04%; 15.0%?Cr?18.%; traces?Ni?0.50%; traces?Mo?0.50%; traces?Cu?0.50%; traces?V?0.50%; traces?Nb?0.03%; traces?Ti?0.03%; traces?Zr?0.03%; traces?Al?0.010%; traces?O?0.0080%; traces?Pb?0.02%; traces?Bi?0.02%; traces?Sn?0.02%; 0.10%?N?0.20%; C+N?0.25%; Cr+16N?5C?16.0%; preferably 17Cr+500C+500N?570%; the rest being iron and impurities resulting from the development. A method for the production of a semi-finished product from this martensitic stainless steel, and cutting tool produced from this semi-finished product.

Abstract: The invention concerns a welded stainless steel tube for use in fluid evaporation techniques, particularly a food fluid, characterized in that it comprises, on its outer heat-exchanging surface, mostly smooth, localized means for accumulating and conducting condensations generated on the heat-exchanging smooth surface, means consisting of elevations in the form of shoulders extending over the length of the tube and capable of forming recesses distributed over said tube length.