409Ni stainless steel is a low chromium niobium stabilized ferritic stainless steel. The addition of nickel can improve corrosion resistance and toughness in welding conditions.Compared with 430 or 304 stainless steel it does not belong to corrosion resistance or high temperature oxidation resistance material, but it is more suitable for low alloy corrosion resistance steel, low carbon steel and coated low carbon steel.When stainless steel 409Ni is exposed to harsh atmospheric conditions, dyeing may occur.409 Nickel alloys should only be used in aesthetically not as a primary requirement, such as in mildly corrosive conditions.The annealed 409Ni is malleable and does not hardento any significant extent during cold operation.

As a result, it can be pulled onto a wire and formed into the desired shape using most standard techniques.409Ni should not be used in low temperature applications below zero due to brittle transition and fracture hazards. It is a ferritic stainless steel.In automotive applications, the SS409NI has found its main application.

The 409Ni stainless steel is an ideal material for meters larger than 0.120 in. Its weldability and toughness is superior to that of the standard 409 model.The cost is relatively low.Transportation applications include automotive exhaust flanges, hopper bodies and discharge chutes, intermodal containers, trailers, bus frames, and dump truck bed liners.In conditions as slippery as those encountered in coal handling equipment, 409 nickel stainless steel is a more economical solution.Potential coal handling applications include chutes, hoppers, bunkers, flooring, perforated plates, sizing machines, flight conveyor grinders, vibrating screen plates, silo feeders, paddle mixers, screw feeders, fuel tank and dryer assemblies.Additional applications include noise suppression barriers, mud pipes, heat shields, cyclones, silos, belt scraper blades, screens and tanks.

Technical Data for 409Ni, UNS S40975 Stainless Steel: