1J50 Alloy Specification
High-Permeability Nickel-Iron Soft Magnetic Alloy
Product Specification
| Standard | GB/T 15018 (China), ASTM A753 (USA) |
| Material Designation | 1J50 (Fe-50Ni), Ni50, Permalloy |
| Tolerance | h7-h11 (on request) |
| Melt Method | Vacuum Induction Melting (VIM) / Vacuum Arc Remelting (VAR) |
| Available Forms & Sizes | Plate: ≤85mm thick Strip: 0.02mm – 2.5mm Bar: Φ8mm – Φ100mm Tube: Custom dimensions |
Chemical Composition (wt%)
| Element | Min | Max |
| Nickel (Ni) | 49.0 | 50.5 |
| Iron (Fe) | Balance | |
| Manganese (Mn) | – | 0.60 |
| Silicon (Si) | – | 0.30 |
| Carbon (C) | – | 0.03 |
| Copper (Cu) | – | 0.20 |
| Phosphorus (P) | – | 0.020 |
| Sulfur (S) | – | 0.020 |
Magnetic Properties
| Property | Value | Condition |
| Initial Permeability (μi) | 3.8-5.0 mH/m | Thickness-dependent |
| Max Permeability (μm) | 43.8-65 mH/m | Thickness-dependent |
| Coercivity (Hc) | 8.8-12 A/m | Thickness-dependent |
| Saturation Induction (Bs) | 1.5-1.6 T | After hydrogen annealing |
Physical Properties
- Density: 8.2 g/cm³
- Melting Point: 1430°C
- Curie Temperature: 500°C
- Thermal Expansion: 8.9×10⁻⁶/K (20-100°C)
- Resistivity: 0.45-0.48 μΩ·m
Applications
- High-power electromagnetic pole pieces
- MRI yoke components
- Particle accelerator magnetic guides
- Precision sensors and relays
- Aerospace navigation systems
- Wireless charging modules
Document generated on 2025/10/21 | For reference purposes only
