| Released onto the market: |
1940's |
| Magnetic output: |
Medium strength |
| Resistance to demagnetisation: |
Poor |
| Relative cost : |
Less cost effective as better alternatives have become available |
| High temperature tolerance : |
Excellent stability over a wide range |
| Corrosion resistance: |
Good |
| Surface FInish : |
Often painted red |
| Physical characteristics : |
Sometimes have a rough cast finish |
| Workability : |
Can be drilled and cut (with difficulty) |
| Uses : |
Used in relatively high temperature environments |
