The stainless steel screws used are SUS304 materials, and SUS202 or SUS201 are also used in the industry, as well as SUS410 (stainless iron screws). Stainless steel screws are used to clean the oil on the surface during production and form a protective film. Its corrosion resistance varies according to different materials. Its resistance to neutral salt spray SUS304 is 48-96 hours, and SUS202 can also be cleaned and passivated.
The anti-neutral salt spray is more than 48, and the stainless steel screw SUS410 is resistant to neutral salt for about 20 hours, and its cost is higher than that of all ferrite and surface-treated screws, so it is best not to use stainless steel later. Iron screws.
