Oerlikon Carborod MnMo description: CARBOROD MnMo is a copper coated ER 80S-D2 type solid TIG welding rod. Suitable for use mainly with Ar shielding gas. CARBOROD MnMo is used for the welding of a range of carbon, low alloyed and higher strength steels in both the as welded and postweld heat-treated conditions. CARBOROD MnMo contains molybdenium for increased deposit strength and a high level of deoxidizers (Mn and Si) to control porosity. TIG rod for welding 0.5% Mo low-alloy steels and for high strength steels.