Differences between the magnetic properties of steel and soft iron.
| Soft iron | Steel |
| Easily magnetized | Not easily demagnetized |
| Demagnetized | Magnetized |
| Have low coercive force | Have large coercive force |
| Have high permeability | Low permeability |
| Highly purified, annealed and Properly oriented for magnetization in the easy direction | Impure, strained and contain Grain boundaries |
| Form Temporary magnets | Form permanent magnets |
![On a fairly cool rainy day when the temperature is 20°C; the length of a steel railroad track is 20m. What will be its length on a hot a dry day when the temperature is 40°C? [coefficient of linear expansion of steel = 11 x 10^-6K‾¹] past-questions-and-answers](https://erudites.ng/wp-content/uploads/2020/06/past-questions-and-answers-150x150.jpg)
