Alloy 201 Pipes and Tubes is a commercially pure nickel alloy with excellent corrosion resistance and low electrical resistivity. Caustic solutions, food handling equipment, and general corrosion-resistant parts and structures all use UNS N02200 Pipes and Tubes. WNR 2.4066 Pipes and Tubes can be used in devices that require magnetically actuated parts because it has magnetic and mechanical properties. We provide these Nickel Alloy 200 products in custom-made shapes and sizes based on our client’s specifications, and at competitive market prices.
Nickel 200 and Nickel 201 are commercially pure wrought alloys with solid solution strengthening. The elemental restrictions of both alloys are combined into a single, dual-certified chemistry, resulting in a single alloy with the desired properties of both alloys. When operating temperatures are expected to exceed 600°F, carbon content becomes critical. Nickel 201’s lower carbon content makes it resistant to graphitization and thus less susceptible to embrittlement. Nickel 201 pressure vessels and components can be built in accordance with the ASME Boiler and Pressure Vessel Code, Section VIII, Division 1 for use up to 1250°F.
Industries and Applications
The chemical and electronics industries make extensive use of nickel 200/201. It’s also used in aerospace, petrochemistry, power generation, and marine/offshore engineering. Electronic and electroplating components, caustic evaporators, food processing equipment, caustic handling and storage equipment, synthetic fiber production, salt production, and other processes involving sodium hydroxide and fluorine are examples of typical applications for Nickel 200/201.
Resistance to Corrosion
Nickel 200/201 has excellent corrosion resistance in reducing and neutral media, as well as in oxidizing atmospheres, assuming that the oxidizing media allows for the formation of a passive oxide film. This oxide film is responsible for the alloy’s excellent corrosion resistance in caustic environments. Nickel 200/201 is frequently used in alkali environments, and it has varying applications in sulfuric, hydrochloric, anhydrous hydrofluoric, and non-aerated organic acids. Nickel 200/201 is resistant to chloride salt stress corrosion cracking and non-oxidizing halide attack. The resistance of this alloy in certain environments can be affected by concentration and temperature.
Fabrication and Heat Treatment
When shaping Nickel 200/201, all hot and cold working techniques can be used. Hot working temperatures should range from 1200°F to 2250°F, with heavy forming performed at temperatures above 1600°F. Annealing should be done at temperatures ranging from 1300°F to 1600°F. When selecting the anneal temperature, keep in mind that time at temperature can have a significant impact on the mechanical properties and structure of the material.