The anti-pitting corrosion

anti-stress corrosion and high temperature anti-oxidizing properties of ferritic stainless steels(11%～30%Cr)are better than that of austenitic stainless

but normal feritic stainless steels have higher intergranular corrosion sensitivity

lower plasticity and toughness

and greater tendency to welding crack. It is obtained by analysis that addition of rare earth elements in feritic stainless steels may improve solidification structure of steel

effect precipitating morphology of carbon-nitride

fine grain size

change morphology of sulphide and composition of inclusion in steel

in order to improve transverse toughness of steel

weldability and fatigue property. Therefore the research work of ap- plication for rare earth elements adding in ferritic stainless steel has promising prospect.