304L stainless steel is often used in the petrochemical industry, building materials.
321 stainless steel is used for automotive exhaust, heat exchangers, containers and other products that are not heat treated after welding.
316 stainless steel is used for equipment used in seawater, chemical, dye, paper, acetic acid, fertilizer and other production equipment.
309S/310S stainless steel is suitable for high temperature electric furnace equipment, drying equipment and other key parts, furnace materials, aviation, petrochemical, electric power, etc.