Un-galvanized Steel expanded metal without any surface treatment has all advantages of galvanized expanded steel metal, expect for higher corrosion resistance. However, un-galvanized steel expanded metal is more economical. So, un-galvanized steel expanded metal is very suitable for use in the places where there are high requirements of strength and lower requirements of corrosion resistance, such as indoor decoration; Fencing for highways, railways, indoor stairs; machine guards, safety door and window, civil building and with concrete in Cement walkway and buildings, etc.