Patent ID: 8153935

Claim:
A flux cored wire for duplex stainless steel comprising a sheath and a flux filled into the sheath, wherein the flux cored wire comprises about 24.0-30.0 wt % Cr, about 7.0-10.5 wt % Ni, about 2.0-4.0 wt %) molybdenum, about 0.10-2.50 wt % Cu, about 0.40-1.00 wt % Si, about 1.5-3.0 wt % Mn, about 0.10-0.30 wt % N compound (converted value of N), and the remainder including iron Fe and inevitable impurities on the basis of a total weight of the wire; the flux comprises about 6.50-12.00 wt % of TiO 2 +SiO 2 +ZrO 2 +Al 2 O 3 , about 0.10-0.50 wt % of Li 2 O+K 2 O+Na 2 O, about 0.10-2.00 wt % of other oxides, and about 0.10-0.50 wt % of metal fluoride (converted value of F) on the basis of the total weight of the wire; and the flux is filled into the sheath at a ratio of about 26-35%.