Ultra-High Magnetic Permeability 1J79 Nickel Iron Alloy Wire with Ultra-Low Coercivity for Sensitive Magnetic Sensor Components

1J79 (equivalent to Permalloy 80 / Ni79Mo4) is an 80% nickel-iron-molybdenum soft magnetic alloy designed for applications requiring maximum magnetic responsiveness at low magnetic field strengths. Processed through vacuum induction melting (VIM), continuous precision drawing, and controlled hydrogen atmosphere annealing, our 1J79 wire delivers consistent magnetic hysteresis properties, tight diameter tolerances, and superior surface integrity.

1J79 nickel-iron alloy wire represents the benchmark in high-permeability soft magnetic materials. Containing approximately 79-80% nickel with molybdenum additives, this alloy achieves near-zero magnetocrystalline anisotropy and magnetostriction after specialized final heat treatment.

For engineers designing precision current transformers, fluxgate sensors, magnetic shielding braids, and miniature magnetic pickups, DLX 1J79 wire eliminates electromagnetic distortion while providing ultra-fast magnetic response under minimal excitation currents. Available in diameters ranging from ultra-fine 0.025 mm to 5.0 mm in continuous spool and coil packaging.

• Ultra-High Magnetic Permeability in Weak Fields: Delivers rapid magnetic saturation and minimal hysteresis loss in low-intensity magnetic fields, ensuring high signal-to-noise ratio in sensor circuits.
• Ultra-Low Coercivity & Minimal Residual Magnetism: Prevents magnetic offset drift and guarantees repeatable sensing cycles in precision instrumentation.
• Strict Dimensional Uniformity & Smooth Surface: Cold-drawn with diamond dies and online eddy-current inspection to ensure zero surface micro-cracks, uniform electrical resistance, and exact winding tension.
• Superior Formability & Solderability: Excellent ductility in the annealed state, allowing tight bend radii for miniature transformer bobbins, micro-coils, and toroidal sensor cores.
• Customized Heat-Treatment Guidance: Fully optimized for pure dry-hydrogen magnetic annealing profiles to maximize batch-to-batch magnetic permeability.

• Magnetic Sensors & Pickups: Core winding wire for fluxgate sensors, Hall effect current transducers, eddy-current displacement sensors, and automotive speed sensors.
• Miniature Instrument Transformers: Micro-CT cores, zero-phase current transformers (ZPCT) for residual current circuit breakers (RCCB), and high-frequency pulse transformers.
• Electromagnetic Shielding & Braided Sleeves: Flexible woven shielding sleeves and layered wraps for sensitive audio cables, aerospace instrumentation, and biomedical signal leads.
• Relay & Solenoid Cores: Magnetic poles, reeds, and armatures requiring instantaneous release without residual sticking.
• Acoustic & Audio Equipment: Cores and shielding components for high-end audio transformers and moving-coil microphone cartridges.

• End-to-End Vacuum Induction Melting (VIM): We control the entire metallurgical process from virgin raw material selection and vacuum refining to wire drawing and annealing, guaranteeing ultra-low interstitial gas and impurity levels.
• Scalable Manufacturing Capacity: Operating modern rolling, continuous multi-pass drawing, and atmospheric annealing lines with a consistent monthly capacity of 1,200 metric tons.
• 100% Comprehensive Quality Verification: Every batch undergoes continuous laser micrometer sizing, tensile testing, eddy-current surface inspection, and perm-meter magnetic permeability validation.
• Tailored Engineering & Custom Packaging: Flexible MOQ policies adapted to alloy grade and wire diameter, supplied on DIN spools (DIN 100/125/160/200), precision coils, or cut lengths with vacuum anti-oxidation barrier packaging.

A: 1J79 (Permalloy 80) features an optimal 80% nickel formulation with molybdenum modification, delivering the highest initial and maximum permeability among commercial soft magnetic alloys. This ensures maximum magnetic flux concentration and zero phase lag under weak alternating or direct magnetic fields.

A: Yes. Cold mechanical stress (such as drawing, bending, or stamping) degrades magnetic domain orientation and increases coercivity. To achieve peak permeability and minimum coercive force, the finished components must undergo high-temperature magnetic annealing in a pure dry hydrogen or high-vacuum atmosphere at 1100°C–1150°C followed by controlled cooling.

A: For ultra-fine wire (0.025 mm to 0.10 mm), we provide precision tolerances down to ±0.002 mm. For standard winding wire (0.10 mm to 1.0 mm), typical tolerance is controlled within ±0.003 mm to ±0.005 mm, ensuring consistent winding resistance and coil geometry.

A: Fine wires are wound uniformly on balanced plastic spools (such as DIN 100, DIN 125, or DIN 160), sealed inside vacuum-sealed aluminum-foil moisture barrier bags with desiccant, and housed in shock-resistant wooden crates or reinforced export cartons.