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Some physical properties
The following are some physical properties (conductivity and specific weight) of several NON-iron metallic materials.
| Material | Specific Weight1 | Conductivity2 |
| ALUMINIUM | 2,70 | 37,8 |
| MAGNESIUM | 1,74 | 22,6 |
| COPPER | 8,96 | 59,6 |
| GOLD | 19,30 | 45,5 |
| ZINC | 7,14 | 16,6 |
| BRASS 63 | 8,45 | 15,6 |
| BRONZE | 8,90 | 6,67 |
| LEAD | 11,34 | 4,81 |
| STAINLESS STEEL 304 | 7,90 | 1,37 |
| (1) Specific Weight: Kg/dm3 (2) Conductivity: S/m | ||
It should be taken into consideration that properties of pure materials are cited in the table (except brass, bronze and stainless steel) and that in reality, we usually have a multitude of alloys that modify these values.
It can therefore be seen that there are big differences between different metals, which entail very important variations in the behaviour of each material facing a magnetic field and the induced currents.