the present invention relates to an austenitic stainless steelresulfuru00e9 improved in machinability, used particularly in the field ofultra high speed machining and cutting the area offree cutting steel, characterized in that the composition is the weightas follows:carbon & 0.1%.silicon & 2%.manganese & 2%.from 7 to 12% nickel.chromium, 15 to 25%.- sulphur, 0.10% to 0.55%.- copper, 1 to 5%.calcium & 35.10-4%.oxygen & 70.10-4%.the ratio of the calcium content in the oxygen content isbetween 0.2 and 0.6.
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