What Is the Chemical Formula for Stainless Steel?

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Stainless steel is created out of iron with the addition of chromium and nickel, which make it resistant to corrosion. Stainless steel includes smaller amounts of copper, carbon, titanium and molybdenum, which can be used in varying amounts to meet a specific application.

Austenitic

  • This type of stainless steel contains at least 16 percent chromium, with small amounts of other elements included to promote specific properties. The most common types of stainless steel are included in this group. It is non-magnetic.

Ferritic

  • This stainless steel group features an addition of 10.5 to 18 percent chromium, and very little nickel. Some grades have only moderate corrosion resistance due to its smaller chromium and nickel content. This series cannot be hardened.

Martensitic

  • This is a high carbon stainless steel with good machining characteristics. The amount of chromium used may vary, and nickel is added. This variety has good hardening capabilities, but with its higher carbon content, it is more difficult to weld.

Duplex

  • This series has a higher chromium and nickel content. It is stronger and has better corrosion resistance.

Precipitation hardening

  • This series of nickel and chromium alloys has a high tensile strength and can be hardened.

References

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