Base Material Properties:
Exhibits strong ferromagnetism in its as-rolled condition
Magnetic permeability similar to other low-carbon structural steels (μr ≈ 200-500)
Saturation magnetization comparable to pure iron (≈2.1 Tesla)
Alloying Element Effects:
Copper additions (0.25-0.55%) slightly reduce magnetic susceptibility
Chromium content (0.50-1.25%) increases electrical resistivity but maintains ferromagnetism
Phosphorus (0.06-0.15%) has minimal impact on magnetic properties
Weathering Effects:
The developing patina (rust layer) is weakly ferrimagnetic
Core material retains >90% of original magnetism after patina formation
Magnetic properties remain stable across temperature ranges from -20°C to +200°C
Comparative Performance:
More magnetic than austenitic stainless steels (which are paramagnetic)
Slightly less magnetic than pure iron due to alloying elements
Comparable to S355JR structural steel in magnetic response
These properties make S355J0WP suitable for applications requiring both weathering resistance and magnetic functionality, such as:
Magnetic shielding in outdoor environments
Electromagnetic equipment housings
Railway and transportation components
Architectural elements with potential EMI considerations
