Oerlikon Inertrod 22 12 description: INERTROD 22 12 is an austenitic welding rod for TIG-welding of identical and similar heat resisting steels. Also suited for welding heat resisting and non-scaling chromium steels, provided that the corrosion attack by reducing sulphur-bearing combustion gases is not to be expected. Non-scaling up to 1000C. INERTROD 22 12 weld deposit is austenitic, containing a 5-10% deltaferrit in the austenitic matrix.