Oerlikon Inertrod 430 description: INERTROD 430 is a ER 430/W 17 type solid TIG welding rod depositing a C-16%Cr weld metal. Suitable for use mainly with Ar shielding gas. INERTROD 430 is suitable for many surfacing operations. The composition of INERTROD 430 is balanced by providing sufficient chromium to give adequate corrosion resistance and yet retain sufficient ductility. These steels have been developed for air hardening and require pre-heating and stress relieving treatments in order to obtain sufficient ductility to allow mechanical working.