Oerlikon Inertfil 309LMo description: INERTFIL 309LMo is used for the welding of stainless steels to mild and medium tensile steels. Used for intermediate layers on steel prior to depositing 316L grade stainless steel cladding. Also used for buffer layers prior to surfacing, where the Mo is a required alloying element. The weld metal has a delta-ferrite content of 15% resulting in a high resistance to hot cracking. Solid wires type 25% Cr 12% Ni high Mo. Used to weld AISI 309 austenitic stainless steels. Used for dissimilar joints such as carbon and duplex.