DUPLEX STAINLESS STEEL

The invention relates to a duplex stainless steel composition, the composition of which consists of, in % by weight: C 0.05% 21% Cr 25% 1% Ni 2.95% 0.16% N 0.28% Mn 2.0% Mo+W/2 0.50% Mo 0.45% W 0.15% Si 1.4% Al 0.05% 0.11% Cu 0.50% S 0.010% P 0.040% Co 0.5% REM 0.1% V 0.5% Ti 0.1% Nb 0.3% Mg 0.1% th...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SERRIERE MICKAEL, PEULTIER JÉRÔME, HAUSER JEAN-MICHEL, CHAUVEAU ERIC, BONNEFOIS BERNARD
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS PUNCHING METAL ROLLING OF METAL TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The invention relates to a duplex stainless steel composition, the composition of which consists of, in % by weight: C 0.05% 21% Cr 25% 1% Ni 2.95% 0.16% N 0.28% Mn 2.0% Mo+W/2 0.50% Mo 0.45% W 0.15% Si 1.4% Al 0.05% 0.11% Cu 0.50% S 0.010% P 0.040% Co 0.5% REM 0.1% V 0.5% Ti 0.1% Nb 0.3% Mg 0.1% the balance being iron and impurities resulting from the smelting, and the microstructure consisting of austenite and 35 to 65% ferrite by volume, the composition furthermore satisfying the following relationships: 40 IF 70 where IF=6×(% Cr+1.32×% Mo+1.27×% Si)−10×(% Ni+24×% C+16.15×% N+0.5×% Cu+0.4×% Mn)−6.17 and ILCR 30.5 where ILCR=% Cr+3.3×% Mo+16×% N+2.6×% Ni−0.7×% Mn, and also to a process for manufacturing plate, strip, coil, bar, rod, wire, sections, forgings and castings made of this steel.