Oerlikon Inertrod 308H description: INERTROD 308H is a W 19 9 H/ER308H type solid TIG welding rod depositing a C-19Cr9Ni weld metal. Suitable for use mainly with Ar shielding gas. INERTROD 308H is suitable for welding AISI 304H austenitic stainless steel and similar steels. It is used mainly in petrochemical industry for the fabrication of pipework and vessel. The higher carbon content gives higher strength at elevated temperatures. TIG rod for type AISI 304H stainless steels. Excellent mechanical strength.