Oerlikon Supranox RS 347 description: SUPRANOX RS 347 is a rutile coated electrode for welding chromium-nickel alloys of similar composition stabilized either with Nb or Ti also suited for ferritic stainless and heat resistant Cr-steels. Suitable for welding of high temperature gaskets and expansion joints, rocket engine parts, aircraft collector rings and exhaust manifolds and chemical production equipment. Outstanding weldability, spatter free and a self-releasing slag, resulting in a very smooth bead appearance and excellent mechanical properties at high temperatures. The weld metal transfer is in fine droplets producing finely rippled concave fillet welds with an outstanding weld bead aspect. The Nb+Ta in the weld metal is meant to compensate the sublimation of titanium at the liquidus temperature of the weld pool. This addition reduces the possibility of intergranular chromium carbide precipitation and thus increases resistance to intergranular corrosion. Good striking and restriking. Under wet corrosive conditions, suitable for operating temperatures <400C, non-scaling <800C.