Rutile flux-cored wire of T 23 12 L R / E309T0 type. Primarily intended for surfacing low-alloyed steels and for dissimilar welds between mild steel and stainless steels. The corrosion resistance is superior to T 19 9 L / E308L type fillers. When used for overlay welding on mild steel a corrosion resistance equivalent to that of base metal 1.4301 / 304 is obtained already in the first layer. Provides excellent weldability in flat as well as horizontal vertical position. Ferrite measured with FeritScope MP30: 14 – 22 FN. Great slag detachability and almost no spatter formation. Optimized to result in a shiny weld metal surface; also when welding with 100% CO2. Due to the slow freezing rutile slag, the weld metal shows very smooth bead appearance and low temper discoloration, which makes post-weld cleaning easier. Maximum service temperature 300°C. The scaling temperature is approximately 1000°C in air. Welding in vertical-up and overhead positions is preferably done using FOXcore 309L-T1.