Chemical Composition of Thermoelements in Percent
| Positive (+) Conductors | Negative (+) Conductors | ||||||||
| Element | J | T | K, E | N | RX / SX | J, T, E | K | N | RX / SX |
| Iron | 99+ | ||||||||
| Manganese | 1 | 2 | 2 | ||||||
| Silicon | 1.5 | 1.5 | 4 | ||||||
| Nickel | 90 | 84 | 44 | 94 | 95 | 3 | |||
| Copper | 100 | 100 | 55 | 95 | |||||
| Chromium | 10 | 14 | |||||||
| Aluminum | 2 | ||||||||
| Magnesium | 0.15 | ||||||||
| Magnetic | Y | N | N | N | N | N | Y | Y* | N |
About TE Wire & Cable LLC
TE Wire & Cable LLC, a Marmon Wire & Cable/Berkshire Hathaway Company, is a premier Thermocouple and Specialty wire and cable manufacturer that formed from the Wire and Cable Division of the Thermo Electric Corporation. TEW&C operations for the manufacture of wire and cable have been in existence for more than 79 years. Starting in 1941, TEW&C committed to a mission of providing high-quality wire to the temperature measurement markets, supplying applications from cryogenic up to 1300°C temperatures. Presently, TE Wire & Cable manufactures a full line of thermocouple wire and cable, from iron and nickel-based alloys, and copper with a full line of insulating materials ranging from PVC to high-end CEFIR®, ceramic fiber braids.