| Material
|
σ, mhos/meter
|
| Silver
|
6.17 X 107
|
| Copper
|
5.80 X 107
|
| Gold
|
4.10 X 107
|
| Aluminum
|
3.82 X 107
|
| Tungsten
|
1.82 X 107
|
| Zinc
|
1.67 X 107
|
| Brass
|
1.5 X 107
|
| Nickel
|
1.45 X 107
|
| Iron
|
1.03 X 107
|
| Bronze
|
1 X 107
|
| Solder
|
0.7 X 107
|
|
| Material
|
σ, mhos/meter
|
| German silver
|
0.3 X 107
|
| Manganin
|
0.227 X 107
|
| Germanium
|
0.22 X 107
|
| Stainless steel
|
0.11 X 107
|
| Nichrome
|
0.1 X 107
|
| Graphite
|
7 X 104
|
| Water (sea)
|
4
|
| Silicon
|
1.2 X 103
|
| Ferrite (typ.)
|
7 X 10-2
|
| Limestone
|
10-2
|
| Water (fresh)
|
10-3
|
|
| Material
|
σ, mhos/meter
|
| Clay
|
10-4
|
| Water (dist.)
|
2 X 10-4
|
| Soil (sandy)
|
10-5
|
| Granite
|
10-6
|
| Marble
|
10-8
|
| Bakelite
|
10-9
|
| Porcelain
|
10-10
|
| Diamond
|
2 X 10-13
|
| Polystyrene
|
10-16
|
| Quartz
|
10-17
|
|
|
|