Abstract: A method for manufacturing a plate, a band, or a coil of hot-rolled steel is provided. The method includes providing an ingot or a slab of steel with a desired composition and a microstructure composed of austenite and 35 to 65% ferrite by volume and hot rolling the ingot or slab at a temperature between 1150 and 1280° C. to obtain a plate, a band or a coil. A method for manufacturing a hot-rolled bar or wire of steel, a steel profile and a forged steel piece are also provided.

Abstract: A method for manufacturing a plate, a band, or a coil of hot-rolled steel is provided. The method includes providing an ingot or a slab of steel with a desired composition and a microstructure composed of austenite and 35 to 65% ferrite by volume and hot rolling the ingot or slab at a temperature between 1150 and 1280° C. to obtain a plate, a band or a coil. A method for manufacturing a hot-rolled bar or wire of steel, a steel profile and a forged steel piece are also provided.

Abstract: The present invention provides an austenite-ferrite stainless steel. The steel composition contains in % by weight: 0.01%?C?0.10% 20.0%?Cr?24.0% 1.0%?Ni?3.0% 0.12%?N?0.20% 0.5%?Mn?2.0% 1.6%?Cu?3.0% 0.05%?Mo?1.0% W?0.15% 0.05%?Mo+W/2?1.0% 0.2%?Si?1.5% Al?0.05% V?0.5% Nb?0.5% Ti?0.5% B?0.003% Co?0.5% REM?0.1% Ca?0.03% Mg?0.1% Se?0.005% O?0.01% S?0.030% P?0.040% the rest being iron and impurities resulting from the production and the microstructure being composed of austenite and 35 to 65% ferrite by volume, the composition furthermore obeying the following relations: 40?IF?65 with IF=10% Cr+5.1% Mo+1.4% Mn+24.3% Si+35% Nb+71.5% Ti?595.4% C?245.1% N?9.3% Ni?3.3% Cu?99.8 and IRCGCU?32.0 with IRCGCU=% Cr+3.3% Mo+2% Cu+16% N+2.6% Ni?0.7% Mn and 0?IU?6.0 with IU=3% Ni+% Cu+% Mn?100% C?25% N?2(% Cr+% Si)?6% Mo+45 as well as a method of manufacture of plates, bands, coils, bars, wires, profiles, forged pieces and molded pieces of this steel.

Abstract: The invention concerns an austenite-ferrite stainless steel composition, whose composition contains in % by weight: 0.01%?C?0.10% 20.0%?Cr?24.0% 1.0%?Ni?3.0% 0.12%?N?0.20% 0.5%?Mn?2.0% 1.6%?Cu?3.0% 0.05% 5 Mo 5 1.0% W?0.15% 0.05%?Mo +W/2?1.0% 0.2%?Si?1.5% Al?0.05% V?0.5% Nb?0.5% Ti?0.5% B?0.003% Co?0.5% REM?0.1% Ca?0.03% Mg?0.1% Se?0.005% O?0.01% S?0.030% P?0.040% the rest being iron and impurities resulting from the production and the microstructure being composed of austenite and 35 to 65% ferrite by volume, the composition furthermore obeying the following relations: 40?IF?65 with IF=10%Cr+5.1%Mo+1.4%Mn+24.3%Si+35%Nb+71.5%Ti?595.4%C?245.1%N?9.3%Ni?3.3%Cu?99.8 and IRCGCU?32.0 with IRCGCU=%Cr+3.3%Mo+2%Cu+16%N+2.6%Ni?0.7%Mn and 0?IU?6.0 with IU=3%Ni+%Cu+%Mn?100%C?25%N?2(%Cr+%Si)?6%Mo+45 as well as a method of manufacture of plates, bands, coils, bars, wires, profiles, forged pieces and molded pieces of this steel.