301 304 Stainless Steel conveyor belt cannot be strengthened by heat treatment, and can only be improved by cold deformation. The austenitic structure endows it with good cold and hot workability, non-magnetic and good low temperature performance. 304 steel thin section welded parts have sufficient resistance to intergranular corrosion. It has excellent corrosion resistance in oxidizing acid (HNO3). It also has good corrosion resistance in lye, most organic and inorganic acids and atmospheric water vapor.
The good performance of 304 steel makes it the most widely used steel grade. It is suitable for manufacturing deep-drawn forming parts and transporting corrosive medium pipes, containers, structural parts, etc., and can also be used for manufacturing non-magnetic, low-temperature equipment and components.
304L is an ultra-low carbon austenitic stainless steel based on 304 that reduces C and increases Ni. The purpose is to solve the severe intergranular corrosion of 304 steel in some conditions caused by the precipitation of Cr23C6. Compared with 304, its strength is slightly lower, but its sensitized state resistance to intergranular corrosion is significantly improved. Except for strength, other properties are the same as 304 steel. It is mainly used for corrosion-resistant equipment and components that need to be welded and cannot be solid-solution treated after welding.
The above two steel grades should be carefully selected under conditions that are prone to stress corrosion environment and pitting and crevice corrosion.