Stainless steel grade 409 ( UNS S40900 )Applications This type of grade 409 stainless steels are widely used for : Automotive exhaust tubing Catalytic converter systemsChemical Formulation C:= 0.08 , Mn:=1.00, Si:=1.00, Cr:10.5~11.75, Ni :=0.50, P:=0.045, S:=0.03, Ti:(6C~0.75) Type 409 steels are available in highly stabilized forms, such as S40910, S40920, S40930, which stability of is provided by the presence of niobium, titanium in the composition. Introduction 409 stainless steels used to be called " the cheapest stainless steels ". It is commonly considered as a chr
Stainless Steel Grade 409 Annealed Tube Of ASTM A268