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The Different Between SS304 and SS316

Do you know what is the different between SS304 and SS316 ? Today, Sinpure will show you the detail different .

The first chemical composition is different:

SS316 has 2-3 more nickel than 304


The second property is different:

the strength and hardness of 304 and 316 are similar. The difference between them is that the corrosion resistance of 316 is much better than that of 304. The more important point is that the addition of molybdenum metal to 316 has improved the heat resistance.


The third maintenance method is different:

Molybdenum can further improve the atmospheric corrosion, especially the corrosion of chloride-containing atmosphere, so we often choose 304 stainless steel for curtain walls, side walls, and roofs, but in some aggressive industries Or marine atmosphere, 316 stainless steel is a good choice

The fourth metal material component is different :

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


Fifth material performance difference:

304 (0Cr18Ni9) stainless steel is austenitic stainless steel, which cannot be strengthened by heat treatment, cannot be quenched like carbon steel, and has no magnetic properties. The various mechanical properties of 304 are relatively excellent, with considerable corrosion resistance and high temperature resistance. It is the most widely used as stainless heat-resistant steel.

316 (0Cr17Ni12Mo2) stainless steel is the second most widely used steel after 304. Its main characteristics are that it has a higher resistance to acid and alkali and high temperature than 304. Another remarkable feature is that there is basically no phenomenon of thermal expansion and contraction, which is extremely important for precision parts....


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