PRODUCT INFORMATION Category: Stainless Steel Wire Alloy: WW409CB Class: ER409CB Description: ER409Cb is a ferritic stainless steel welding wire which is used to weld Type 409 and 409Ti base materials. Addition of columbium leads to a preferential reaction with carbon, saving chromium from forming carbides. This improves corrosion resistance, increases strength at high temperatures, and promotes ferritic micro-structure. Chemical Composition C 0.08 max Cr 10.5-13.5 Ni 0.6 max Mo 0.50 max Mn 0.8 max Si 1.0 max P 0.04 max S 0.03 max Cu 0.75 max Nb Nb = 10xC min - 0.75 max