RU2001105902A - RESULFURED, AUSTENITIC, STAINLESS STEEL WITH HIGH PROCESSABILITY AND IMPROVED CORROSION RESISTANCE - Google Patents

Claims (4)

1. Resulfurized austenitic stainless steel with high machinability and improved corrosion resistance, characterized in that it contains calcium aluminate inclusions of the type anorthite and / or pseudo-wollastonite and / or gelenite associated with CrMnS inclusions with a chromium content of 30 and more up to 70%. 2. Steel according to claim 1, characterized in that it has the following composition, wt.%: 0.01% ≤ carbon ≤ 0.1%; 0.01% ≤ silicon ≤ 2.0%; 0.01% ≤ manganese ≤ 0.5%; 10% ≤ chrome ≤ 25%; 7% ≤ nickel ≤ 12%; 0.15% ≤ sulfur ≤ 0.45%; 0.01% ≤ molybdenum ≤ 3.00%; 0.5% ≤ copper ≤ 3.5%; 0.01% ≤ nitrogen ≤ 0.1%; 0.0020% ≤ aluminum ≤ 0.0100%; 0,0005% ≤ phosphorus ≤ 0,050%; 30 * 10 ^-4 % ≤ calcium ≤ 200 * 10 ^-4 %; 70 * 10 ^-4 % ≤ oxygen ≤ 300 * 10 ^-4 %; 0.20 ≤ calcium / oxygen ≤ 0.60, the rest is iron and residual elements introduced in the preparation of steel, the steel containing, in particular, inclusions of calcium aluminate of the type anorthite, and / or pseudowollastonite, and / or gelenite associated with inclusions from CrMnS with a chromium content of 30 to 70%. 3. Steel according to claim 2, characterized in that it further comprises less than 30 * 10 ^-4 wt.% Boron. 4. Steel according to claim 2, characterized in that it further comprises 0.01-0.3 wt.% Vanadium.