Oerlikon Inertrod 25 10 4 description: INERTROD 25 10 4 is a W 25 9 4 N L type solid TIG welding rod depositing a C-25Cr 10Ni 4Mo weld metal. Suitable for use mainly with Ar shielding gas. INERTROD 25 10 4 is used for the welding of super-duplex stainless steels. Mainly used in offshore applications, paper industry, oil industry and in the production of artificial manure. Used for root pass welding of 22%Cr standard duplex steels for critical applications, and for the welding of low carbon super martensitic 13%Cr steels. INERTROD 25 10 4 has a very good resistance to general corrosion, the weld metal has a high resistance to pitting
with a PREN value >40 combined with a good resistance to both crevice corrosion and stress corrosion cracking. The weld metal nickel content over matches the parent material by 2-3% to provide for an optimum balance of austenite and ferrite in the as-welded condition.