Chemistry:Alumel
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Alumel is an alloy consisting of approximately 95% nickel, 2% aluminium, 2% manganese, and 1% silicon. This magnetic alloy is used to make the negative conductors of ANSI Type K (chromel-alumel) thermocouples and thermocouple extension wire.[1] Alumel is a registered trademark of Concept Alloys, Inc.[2]
| Electrical resistivity | 0.294 μΩ m |
| Temperature coefficient | 23.9×10−4 K−1 |
| Curie point | 152 °C[3] |
| Density | 8.61 g cm−3 |
| Melting point | 1399 °C |
| Tensile strength (annealed) | 586 MPa |
| Tensile strength (stress relieved) | 1030 MPa |
| Tensile strength (hard) | 1170 MPa |
| Coefficient of thermal expansion | 12×10−6K−1 at 20 °C |
| Specific heat | 0.523 J g−1 K−1 [4] |
| Thermal conductivity | 29.7 W m−1 K−1 [5] |
References
- ↑ "Working with Chromel, Alumel & Constantan" (in en-US). Keats Manufacturing Co.. 2015-03-12. http://www.keatsmfg.com/blog/working-with-chromel-alumel-constantan/.
- ↑ Concept Alloys, Inc. Intellectual Property retrieved 12 April 2016
- ↑ Horton, J. L.; Kollie, T. G.; Rubin, L. G. (1977). "Measurement of B versus H of Alumel from 25 to 180 °C". Journal of Applied Physics 48 (11): 4666. doi:10.1063/1.323530. Bibcode: 1977JAP....48.4666H.
- ↑ "Physical Properties of Thermoelement Materials". https://www.omega.com/temperature/Z/pdf/z016.pdf.
- ↑ "Super Alloy Alumel". 2012-11-09. http://www.azom.com/article.aspx?ArticleID=7802.
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