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The tensile strength and hardness are increased during cold working, and it is non-magnetic, but it is magnetic after cold working. Uses: trains, aircraft, conveyor belts, vehicles, bolts, springs, screens. Remarks: L stands for low carbon, such as 304L is lower than 304 carbon. H and S represent high temperature resistance, such as 310S is stronger than 310, and 304H is heat resistant to 304.