Magnetic Permeability Values for Common Materials
On this page, you can find the magnetic permeability and relative permeability values for different materials in henry per meter (H/m) unit.
All values are taken at room temperature (approximately 20°C or 68°F).
| Relative permeability (μ/μo) | ||
|---|---|---|
| Air | 1.2566375 ×10-6 | 1.00000037 |
| Al-Si-Fe powder compound (Sendust) | 1.76 ×10-5 - 2.01 ×10-4 | 14 - 160 |
| Aluminum | 1.256665 ×10-6 | 1.000022 |
| Austenitic stainless steel | 1.26 ×10-6 - 8.8 ×10-6 | 1.003 - 1.05 |
| Bismuth | 1.25643 ×10-6 | 0.999834 |
| Carbon steel | 1.26 ×10-4 | 100 |
| Carbonyl iron powder compound | 5.03 ×10-6 - 4.4 ×10-5 | 4 - 35 |
| Cobalt-iron (high permeability strip material) | 2.3 ×10-2 | 18000 |
| Concrete (dry) | 1.25664 x 10-6 | 1 |
| Copper | 1.256629 ×10-6 | 0.999994 |
| Electrical steel | 5 ×10-3 | 4000 |
| Ferrite (cobalt nickel zinc) | 5.03 ×10-5 - 1.57 ×10-4 | 40 - 125 |
| Ferrite (magnesium manganese zinc) | 4.4 ×10-4 - 6.28 ×10-4 | 350 - 500 |
| Ferrite (manganese zinc) | 4.4 ×10-4 - 2.51 ×10-2 | 350 - 20000 |
| Ferrite (nickel zinc) | 1.26 ×10-5 - 2.89 ×10-3 | 10 - 2300 |
| Ferritic stainless steel (annealed) | 1.26 ×10-3 - 2.26 ×10-3 | 1000 - 1800 |
| Hydrogen | 1.256637 ×10-6 | 1 |
| Iron (99.8% pure) | 6.3 ×10-3 | 5000 |
| Iron (99.95% pure Fe annealed in H) | 2.5 ×10-1 | 200000 |
| Iron powder compound | 1.76 ×10-5 - 1.26 ×10-4 | 14 - 100 |
| Martensitic stainless steel (annealed) | 9.42 ×10-4 - 1.19 ×10-3 | 750 - 950 |
| Martensitic stainless steel (hardened) | 5.0 ×10-5 - 1.2 ×10-4 | 40 - 95 |
| Metglas 2714A (annealed) | 1.26 ×102 | 1000000 |
| Mo-Fe-Ni powder compound (molypermalloy powder, MPP) | 1.76 ×10-5 - 6.91 ×10-4 | 14 - 550 |
| Mu-metal | 6.3 ×10-2 | 50000 |
| Mu-metal | 2.5 ×10-2 | 20000 |
| Mumetal | 1.25 ×10-1 | 100000 |
| NANOPERM | 1.0 ×10-1 | 80000 |
| Neodymium magnet | 1.32 ×10-6 | 1.05 |
| Nickel | 1.26 ×10-4 - 7.54 ×10-4 | 100 |
| Nickel iron powder compound | 1.76 ×10-5 - 2.01 ×10-4 | 14 - 160 |
| Palladium | 1.25763 ×10-6 | 1.0008 |
| Permalloy | 1.25 ×10-1 | 100000 |
| Platinum | 1.25697 ×10-6 | 1.000265 |
| Pyrolytic carbon | 1.256 ×10-6 | 0.9996 |
| Sapphire | 1.256637 ×10-6 | 0.99999976 |
| Silicon iron powder compound | 2.39 ×10-5 - 1.13 ×10-4 | 19 - 90 |
| Superconductors | 0 | 0 |
| Teflon (PTFE) | 1.2567 ×10-6 | 1.000058 |
| Vacuum | 1.256637 x 10-6 (μo) | 1 |
| Water | 1.256627 ×10-6 | 0.999992 |
| Wood | 1.2566376 ×10-6 | 1.00000043 |
The magnetic permeability values in this table are approximate and can vary depending on factors such as temperature and impurities in the materials.
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