Grades and application directions of common nickel and nickel base alloys


The family of nickel and nickel base alloys is large and has many members. The common nickel base alloy products on the market also have a wide variety and different forms. How are nickel and nickel alloys classified? Generally, we classify them according to their main alloy components. The following is a brief introduction to nickel and nickel alloys widely used in chemical equipment:

Pure nickel (UNS n02201)

It has good corrosion resistance and can resist original acids and salts, but it will be lost in strong oxidizing media such as nitric acid and pure nickel.

The outstanding advantage of pure nickel is its resistance to caustic soda, and even its corrosion to molten caustic soda is excellent.

Nickel chromium iron alloy 600 UNS n06600

Chromium is added to alloy 600 on the basis of nickel to enhance its adaptability to oxidation environment. Although alloy 600 has general corrosion resistance to inorganic acids, it has excellent corrosion resistance. Therefore, alloy 600 is widely used in the production and storage of fatty acids, hydroxides and alkaline chemicals. Alloy 600 has excellent heat resistance and corrosion resistance. It can also be used normally in high-temperature halogen environment, so it is an ideal material for chlorination reaction process. Alloy 600 also has excellent high temperature degradation resistance such as oxidation resistance, carburization resistance and nitriding resistance.