Oerlikon Carborod W 225V description: CARBOROD W 225V is a copper coated ER90S-G type solid TIG welding rod depositing a 2¼Cr 1MoV weld metal for the welding of creep resistant steels. Suitable for use with Ar shielding gas. CARBOROD W 225V is used for welding of 2 1/4CrMoV (P22V) steels. Used in the petrochemical industry for hydrocrackers and heavy wall pressure vessels for hydrogen service. CARBOROD W 225V has a very low impurity deposit. For very heavy wall-thickness in P22V it could be necessary to apply intermediate stress relieving treatments to reduce the overall stress level.