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Conducting Materials

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Here's a comprehensive list of resistivities, provided with permission from Eddy Current Technology Incorporated (thanks!). Also, thanks to Günter for pointing it out!

If you need to know more about any specific material in this table, click on the material name. Our reference for this info mainly is the boulder.nist.gov web site. Please be sure to find a second reference on this data (preferably your material vendor) before you base a design on this data!

A variety of metals and alloys are used for conductors and resistors on printed circuit boards and thin-film networks. Thick film conductors are formed from pastes, and will be treated separately by Microwaves101 at a later date.

If you have any data we can add to this table, please This email address is being protected from spambots. You need JavaScript enabled to view it.

Material Formula

Temperature coefficient
of resistivity (TCR)

(ppm/°C)

Bulk resistivity
at 25C
(μΩ-cm)
Bulk resistivity
at 25C
(Ω-m)
Bulk conductivity
S/m
Melting point
°C
Melting point
°F
Aluminum Al 4200 2.65  2.65E-8  3.77E7 660 1221
Carbon C -500 3000  3E-5  3.33E4    
Chromium Cr 5900 18  1.8E-7  5.56E6 1857 3374.6
Copper Cu 4300 1.673  1.673E-8  5.98E7 1083 1981.4
Gold Au 4000 2.44  2.44E-8  4.10E7 1064 1947.2
Indium In 5200 15.52  1.552E-7  6.44E6 156.7 314
Iridium Ir   5.3  5.3E-8  2.13E7 2410 4370
Iron Fe 6500 9.66  9.66E-8  1.04E7 1535 2795
Lead Pb 4200 20.65  2.065E-7  4.84E6 328 622.4
Magnesium Mg   4.2  4.2E-8  2.38E7    
Nickel Ni 6800 8.707  8.707E-8  1.14E7 1453 2647.4
Nichrome Ni80/Cr20 0 to 50 110  1.1E-6  9.09E5    
Palladium Pd 4200 10.5  1.05E-7  9.42E6 1552 2825.6
Platinum Pt 3000 10.6  1.06E-7  9.42E6 1768 3215
Rhodium Rh   4.51  4.51E-8  2.22E7 1966 3570.8
Silver Ag 4100 1.59  1.59E-8  6.29E7 962 1763.6
Tantalum Ta   15.52  1.552E-7  6.44E6 2996 5424.8
Tantalum nitride TaN -100 252  2.52E-6  3.97E5    
Tin (white) Sn 4600 11.55  1.155E-7  8.66E6 232 449.6
Titanium Ti   55  5.5E-7  1.82E6 1660 3020
Tungsten W 4800 5.6  5.6E-8  1.79E7 3422 6192
Zinc Zn 4200 5.68  5.68E-8  1.76E7 420 788
Zirconium Zr   4.1  4.1E-8  2.44E7 1852 3365.6
 

Author : Unknown Editor

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