439 steel grade is in general ferrite materials (430) on the basis of reducing the content of C, at the same time to join Ti set elements, such as to make the steel intergranular corrosion resistance, formability and weldability are improved.Compared with the 304 steel, although low elongation (30%), but the strength, corrosion resistance, and corrosion resistance of 200 series materials.
Main USES, elevators, escalators decorative board, building decorative materials, such as decorative structures, structural tube automobile exhaust system components, washing machine barrel