Nickel 200 is a reinforced solid solution, commercially pure wrought material with good mechanical properties over a wide range of temperatures and excellent corrosive resistance, especially hydroxides. It also has excellent tolerance to caustic alkalis at different concentrations and temperatures. The corrosion resistance in de-aerated acid is however higher. The alloy has low gas and vapor density, and high electrical and thermal conductivity. The Nickel 200 plates provides corrosion resistance in reducing and neutral media as well as in oxidizing atmospheres given a passive oxide film can be formed by the oxidizing media. This oxide film represents excellent resistance to the materials in caustic environments. Corrosion rates are very low in both the marine and rural atmospheres. Nickel 200/201 resistance to corrosion through distilled and natural waters is excellent.
Nickel 200 is usually limited to operation under 600 ° F. Nickel 200 products will suffer from graphitization at higher temperatures which can lead to seriously compromised properties. The carbon content is critical when the operating temperatures are expected to exceed 600 ° F. When shaping Nickel 201 plates both hot working and cold working methods can be used. Hot working temperatures for intense shaping should be between 1200 ° F and 2250 ° F to be done at temperatures above 1600 ° F. Annealing should be performed at a temperature of 1300 ° F to 1600 ° F. While selecting the anneal temperature and time at temperature, caution should be taken for this can greatly influence the mechanical properties and structure of the material.
All hot working and cold working practices can shape the nickel 200 alloy. The alloy can be worked hot between 649 ° C (1200 ° F) and 1232 ° C (2250 ° F), with heavy forming at above 871 ° C (1600 ° F) temperatures. The annealing is done between 704 ° C (1300 ° F) and 871 ° C (1600 ° F) at temperature.
The Nickel Alloy 200 has several advantages, making them one of the most versatile and commonly used nickel alloy in the industry.
Advantages of Nickel 200 Alloy.
- Highly resistant to various reducing chemicals
- Offers some hydrochloric and sulfuric acid resistance at modest temperatures and concentrations
- Excellent corrosion resistance to distilled and natural waters
- Resistance to neutral and alkaline salt solutions
- High electrical conductivity
- Excellent resistance to caustic alkalis
- Widely used to handle caustic soda
- Good thermal, electrical and magneto properties
- Excellent resistance to dry fluorine
Applications of Nickel 200 Alloy
Industries where Nickel 200 can be used include chemical processing and storage, the manufacture of synthetic fiber, and sodium hydroxide and fluorine processes. Aerospace and protection as well as food processing are other uses. Nickel 200 Alloy has remarkable tolerance at different temperatures and concentrations to the caustic alkali.
The Nickel 200 Alloy is also used in the manufacturing of various Food Processing equipment. Hence it is also considered as a Food Grade alloy because it doesn’t react with the metal, keeping the food safe and pure. The alloy is also used in the manufacturing and handling of sodium hydroxide, particularly at temperatures above 300° F. Reactors and vessels in which fluorine is generated and reacted with hydrocarbons are also manufactured with the Nickel Alloy 200. Some other applications of the Nickel 200 Alloy includes Salt production, Marine and offshore engineering, Drums to transport chemicals and Rocket motors.