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The NC-12 protection tube is a dense, sintered ceramic specially designed for use in many molten non-ferrous metals and corrosive chemicals. NC-12 is very strong, thermally shock resistant and dimensionally stable. Additionally, NC-12 is vacuum-tight and has high electrical resistance. Mechanical strength is retained at extremely high temperatures (over 1,000 degrees Celsius in air). Together, these features with very low wear resistance, make NC-12 an ideal thermcouple protection tube not necessary because NC-12 has very low thermal expansion coefficient.
The NC-12 protection tubes are recommended for use in oxidizing environments to 2,200 degrees Fahrenheit. Most acids, such as hydrochloric, nitric, sulfuric, and phosphoric do not attack NC-12. This material is also resistant to hydrogen gas. It is not recommended for use with caustic solutions and hydrofluoric acid. Click the link provided for information about corrosion resistance and melting points of different materials.
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