High Saturation Flux Density 1J50 Soft Magnetic Alloy Rod from Vacuum Induction Melting for Electromagnetic Core Manufacturing

DLX Alloy supplies ultra-pure 1J50 (50Ni-Fe) soft magnetic alloy rods engineered for high-efficiency electromagnetic cores, precision current transformers, and magnetic shielding components. Manufactured via vacuum induction melting (VIM) with tight dimensional tolerances and exceptional magnetic permeability.

1J50 is a balanced 50% nickel-iron (50Ni-Fe) precision soft magnetic alloy specifically formulated to deliver an optimal balance of high saturation magnetic induction (Bs≈1.55 T) and high initial/maximum magnetic permeability. Compared to conventional electrical steels and high-nickel alloys, 1J50 rod provides significantly higher magnetic flux density while maintaining low core loss and minimal coercive force in medium-to-high magnetic field environments.

Manufactured through advanced Vacuum Induction Melting (VIM) followed by precision electroslag refining and multi-pass hot/cold forging processes, DLX 1J50 precision alloy bars exhibit exceptional chemical homogeneity, ultra-low non-metallic inclusion levels, and uniform grain structure. This ensures highly predictable magnetic behavior and consistent machining performance across every production batch, making it the premier material choice for mission-critical electromagnetic cores, sensitive relays, and magnetic actuators.

Note: Ultra-pure melt control ensures total residual gas content (O2+N2+H2) is maintained below 40 ppm to guarantee optimum magnetic domain movement.

• Optimized Saturation Flux Density (Bs≥1.55 T): Delivers 70% higher saturation induction than 80% Ni Permalloys (e.g., 1J85/1J79), enabling compact component designs capable of handling high magnetic flux without saturation.
• Ultra-Low Eddy Current and Hysteresis Loss: Vacuum refined grain boundaries and homogeneous 50Ni-Fe metallurgical balance minimize energy dissipation in medium-frequency AC and pulsed magnetic systems.
• Superior Machinability & Surface Integrity: Defect-free surface finish with zero micro-cracks and tight roundness tolerances, optimized for precision CNC turning, high-speed drilling, and core winding assemblies.
• High Magnetic Stability Across Temperature Cycles: Demonstrates excellent thermal-magnetic consistency up to 200∘C, ensuring zero signal drift in precision instrumentation and automotive sensors.
• Uniform Response to Heat Treatment: Consistent response to pure dry hydrogen magnetic annealing protocols, allowing end-users to reliably achieve target permeability curves.

• Electromagnetic Core & Pole Pieces: Core material for precision solenoids, stepping motors, magnetic clutches, and sensitive electromagnetic actuators requiring fast response and high holding force.
• Current Transformers & Instrument Cores: Core laminations, ring cores, and solid sensing pins for energy meters, Hall effect sensors, and zero-sequence current detection systems.
• Relay Components & Magnetic Flux Concentrators: Armatures, yokes, and cores in aerospace and industrial safety relays requiring minimal residual magnetism.
• Magnetic Shielding Cylinders & Rod Enclosures: High-efficiency shielding bars and housings protecting sensitive aerospace electronics and medical imaging sensors from external stray magnetic fields.
• Automotive & Aerospace Sensor Systems: Core elements in camshaft/crankshaft position sensors, wheel speed sensors, and throttle valve actuators operating under demanding environmental conditions.

• Integrated Vacuum Melting & Forging Infrastructure: Full-chain manufacturing control from VIM vacuum induction melting, electroslag remelting (ESR), precision rolling, and cold drawing to proprietary atmosphere annealing.
• Massive Production Capacity (1,200 Tons/Month): Stable raw material reserves and robust rolling lines guarantee dependable high-volume supply and short lead times for global Tier-1 OEMs.
• Rigorous Multi-Stage Quality Assurance: Every batch undergoes 100% chemical spectrometry verification, ultrasonic internal flaw inspection, metallographic grain structure validation, and DC/AC magnetic performance testing.
• Tailored Engineering Solutions: Complete support for customized chemical composition fine-tuning, bespoke dimensional cross-sections, and application-specific heat treatment guidance.
• Global Export Packaging Standards: Heavy-duty moisture-proof packaging, anti-corrosion VCI wrapping, and export-grade wooden crating designed for safe international sea and air transit.

A: 1J50 (50% Ni-Fe) provides a significantly higher saturation magnetic induction (Bs≈1.55 T vs. ≈0.75 T for 1J79/1J85). When electromagnetic cores must operate at higher magnetic field strengths without reaching magnetic saturation, 1J50 allows for a much smaller component cross-section, whereas 1J79/1J85 is preferred for weak-signal applications requiring maximum initial permeability.

A: Cold working, cutting, and grinding induce internal mechanical stresses that degrade the soft magnetic properties of 1J50. To restore maximum magnetic permeability and minimize coercive force, components should undergo high-temperature magnetic annealing in a dry hydrogen atmosphere (dew point ≤−40∘C) or high vacuum at 1100∘C−1200∘C, followed by controlled furnace cooling. DLX provides detailed annealing curve recommendations tailored to your part geometry.

A: We supply 1J50 rods ranging from 3.0 mm to 150.0 mm. For precision automatic Swiss-lathe machining, we provide centerless ground bars with tight diameter tolerances within ±0.01 mm (h7/h8 precision grades), surface roughness Ra≤0.4 μm, and straightness ≤0.5 mm/m.

A: Through strict vacuum induction melting temperature curves, ultra-pure virgin raw material selection, and standardized homogenization soaking. Every production heat is verified using closed-circuit permeameters and hysteresis loop tracers, providing full material test reports with verified Bs, μm, and Hc data before dispatch.