Chrome - an alloy consisting of the following elements: chromium - 8.7-10%; nickel - 89–91%; silicon , copper , manganese , cobalt are impurities.
| Parameter: | Value: |
|---|---|
| Linear expansion temperature coefficient | 13.1 · 10 −6 K −1 (0-100 ° C) [1] |
| Electrical resistivity | 6.8 · 10 −7 Ohm · m |
| Mechanical properties | |
| Elongation at break | <44% |
| Impact strength | 108 J m −1 |
| Elastic modulus | 186 GPa |
| Tensile strength | 620-780 MPa |
| Physical properties | |
| Density | 8.7 g cm −3 |
| Melting temperature | 1420 ° C |
| Magnetic properties | Paramagnet, Curie point -120 ° C [1] |
| Thermal properties | |
| Coefficient of thermal expansion | 15.7 × 10 −6 K −1 at 800 ° C [1] |
| Maximum working air temperature | 1100 ° C [1] |
| Thermal conductivity | 17.6 W · m −1 · K −1 at 20 ° C 34.3 W · m −1 · K −1 at 800 ° C [1] |
A wire for thermocouples is made from an alloy, the most common is a chromel- alumel type thermocouple (HA, in the international classification type K). Chromel- Kopel thermocouples (HC, international - type L) are also used.
See also
- Nichrome (also called Chromel A ).
Notes
- ↑ 1 2 3 4 5 6 Rogelberg I. L., Beilin V. M. Alloys for thermocouples. Reference ed. M .: Metallurgy, 1983. 360 p., Ss. 70-90
Links
- Chromel // Great Soviet Encyclopedia : [in 30 vol.] / Ch. ed. A.M. Prokhorov . - 3rd ed. - M .: Soviet Encyclopedia, 1969-1978.