Duplex stainless steel alloy

A duplex stainless steel alloy with ferritic-austenitic matrix and with high resistance to corrosion in combination with good structural stability and hot workability, with a content of ferrite of 40-65% and a well balanced composition that imparts corrosion resistance properties, which makes it is more suitable for use in chloride-containing environments than earlier been considered being possible. The total PRE or PREW number exceeds 44. The ratio of PRE(W) value for the austenite phase to PRE(W) value for the ferrite phase lies between 0.90 and 1.15. One preferred composition includes (in weight %) up to 0.03% C, up to 0.5% Si, 24.0-30.0% Cr, 4.9-10.0% Ni, 3.0-5.0% Mo, 0.28-0.5% N, 0-3.0% Mn, 0-0.0030% B, up to 0.010%, 0-0.03% Al, 0-0.010% Ca, 0-3.0% W, 0-2.0% Cu, 0-3.5% Co, 0-0.3% Ru, balance Fe and inevitable impurities.