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Material The main difference between 304 stainless steel and 316 stainless steel

1. The difference in the main components of metal


   Both stainless steel 304 and  stainless steel 316 contain about 16-18% chromium, but  stainless steel 304 contains an average of 9% nickel, while stainless steel 316 contains an average of 12% nickel. Nickel can improve high temperature durability, improve mechanical properties, and improve oxidation resistance in metallic materials. Therefore, the nickel content of the material directly affects the overall performance of the material.

2, the difference in material properties


    304 (0Cr18Ni9) stainless steel is austenitic stainless steel, can not be strengthened by heat treatment, can not be quenched like carbon steel, no magnetic. 304 has excellent mechanical properties, and has considerable corrosion resistance and high temperature resistance. It is the most widely used as stainless steel.
     316 (0Cr17Ni12Mo2) stainless steel is the second most widely used steel grade after 304. Its main characteristics are acid and alkali resistance and high temperature resistance. It is mainly used in food industry and surgical equipment, and 316 stainless steel. Another notable feature is that there is basically no thermal expansion and contraction, which is extremely important for precision parts.

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