Corrosion Resistant Soft Magnetic 1J36 Soft Magnetic Alloy Wire for Industrial Solenoid Valves

1J36 soft magnetic alloy wire is a high-grade 36% nickel-iron (Ni-Fe) precision magnetic alloy optimized for high-performance electromagnetic components. Compared to standard silicon steel and pure electrical iron, 1J36 exhibits an ideal balance of soft magnetic properties and atmospheric corrosion resistance, preventing rust-induced plunger sticking and magnetic performance decay in industrial solenoid valves.

Manufactured via High-Purity Vacuum Induction Melting (VIM) followed by Electroslag Remelting (ESR), our 1J36 wire achieves ultralow non-metallic inclusion levels and uniform grain distribution. This clean metallurgical foundation ensures stable B-H loop characteristics, low coercivity (HcHc), and fast dynamic electromagnetic switching response over long service cycles.

Our metallurgical process maintains ultra-narrow compositional windows to ensure uniform electromagnetic performance batch-to-batch:

In humid atmospheres, industrial steam, or mild chemical exposure, conventional electrical iron rapidly develops surface oxides that cause solenoid plunger jamming. 1J36 forms a dense, self-passivating nickel-rich oxide layer, ensuring long-term mechanical travel reliability without requiring secondary nickel/chromium electroplating.

With exceptionally low residual magnetic flux and coercivity (Hc≤16 A/mHc≤16 A/m), 1J36 wire prevents electromagnetic latch-up when the coil is de-energized. This delivers instant, repeatable valve shutoff times critical for automated fluid controls and high-frequency pulsed dosing systems.

The 36% Ni-Fe matrix provides stable permeability and low thermal expansion coefficients across common industrial working temperatures (−40∘C−40∘C to +120∘C+120∘C), preventing solenoid performance drift in extreme working conditions.

• Industrial Solenoid Valve Cores & Plungers: Stationary and movable magnetic armatures for pneumatic automation, hydraulic pilot controls, and gas shut-off valves.
• Fuel & Urea Injection Valves: Automotive and heavy-duty common rail metering solenoids requiring corrosion resistance against diesel, additives, and exhaust fluids.
• Medical & Laboratory Fluidic Valves: Miniature proportional valves handling deionized water, diagnostic reagents, and analytical gases.
• High-Reliability Relays & Magnetic Actuators: Sensitive electromagnetic relays, reed switches, and precision magnetic shielding wires in industrial instrumentation.

• Integrated Vacuum Metallurgy: Total process control from high-purity VIM/ESR ingot casting, hot rolling, multi-pass cold drawing, to continuous atmosphere annealing.
• 1,200 Tons Monthly Capacity: Robust mass-production infrastructure supporting global OEM supply chains with rapid lead times and full lot-to-lot traceability.
• Tight Electromagnetic Verification: Every batch undergoes B-H curve permeameter testing, eddy current flaw detection, and continuous laser diameter monitoring.
• Flexible Customization: Custom spooling (DIN 125, DIN 200, DIN 250), custom cut lengths, and tailored magnetic annealing instructions based on specific customer core geometries.

While 1J50 offers higher initial permeability, 1J36 provides significantly superior atmospheric and moisture corrosion resistance. Pure iron corrodes rapidly in moist air, leading to surface rust and mechanical binding of valve plungers. 1J36 solves this reliability issue without requiring electroplating, which can alter critical dimensional tolerances.

Yes. To achieve optimal soft magnetic properties (lowest coercivity and highest permeability), final magnetic annealing is recommended after cold forming or machining. Standard annealing is carried out at 1050∘C–1150∘C1050∘C–1150∘C in a dry hydrogen or high-vacuum atmosphere, followed by controlled slow cooling. DLX Alloy can also supply pre-annealed wire for direct winding/forming applications.

Our standard MOQ is 5 kg for standard stock diameters and 20–50 kg for custom wire gauges. Packaging options include precision plastic spools (carton packed) for fine wire, continuous coil bundles wrapped in moisture-barrier film, and reinforced wooden export cases for straightened rods.