Explore our engineering capabilities across high-intensity permanent magnets, specialized assemblies, and custom-configured rare-earth solutions.
A trusted global leader in the engineering, R&D, and large-scale manufacturing of high-integrity permanent magnets since 1999.
Founded at the turn of the millennium, Zhejiang Laysun Magnetics Ltd. has evolved from a visionary developer to a national high-tech powerhouse. Headquartered in the dynamic city of Hangzhou, with a massive production hub covering 100,000 square meters in Sichuan, we serve leading industrial and technology companies worldwide.
We specialized initially in high-performance sintered and bonded NdFeB magnets, and have integrated comprehensive engineering capabilities to design and manufacture permanent Alnico magnet solutions, multi-pole assemblies, and custom pot magnets for rugged industrial environments.
Scale, precision, and efficiency metrics that define our market leadership.
A comprehensive metallurgical guide to one of the most stable magnetic alloys known to modern engineering.
Alnico (Aluminum-Nickel-Cobalt) alloys boast the lowest reversible temperature coefficient of any commercial magnet material. With a Curie point of approximately 860°C and a maximum operating temperature reaching up to 525°C, Alnico magnets remain highly functional in extreme heat environments where NdFeB or SmCo magnets would suffer irreversible demagnetization.
Alnico magnets exhibit exceptional induction values (remanence, Br) up to 13,500 Gauss, making them highly effective for precision sensing applications. Furthermore, their metallic composition provides inherently high corrosion resistance, negating the absolute need for anti-oxidation coatings like nickel or epoxy under standard operating conditions.
| Magnetic Alloy Type | Remanence (Br) - Gauss | Coercivity (Hc) - Oersteds | Max Energy Product (BH max) | Max Temp Limit (°C) |
|---|---|---|---|---|
| Cast Alnico 5 | 12,500 - 12,800 | 600 - 640 | 5.0 - 5.5 MGOe | 525°C |
| Cast Alnico 8 | 8,000 - 8,400 | 1,650 - 1,800 | 5.0 - 6.0 MGOe | 525°C |
| Sintered Alnico 5 | 10,500 - 11,500 | 550 - 600 | 3.5 - 4.0 MGOe | 525°C |
| Rare Earth NdFeB (N52) | 14,200 - 14,800 | 11,000 - 12,000 | 50 - 53 MGOe | 80°C |
How industries leverage Permanent Magnet Alnico today and what lies ahead on the technology horizon.
Alnico magnets are the standard for high-reliability systems, including aircraft tachometers, magnetic compasses, military radar systems, and downhole petroleum exploration sensors. Their minimal magnetic variance over wide thermal variations ensures consistent calibration. In automotive sensors and classic electric guitar pickups, Alnico provides a specific, warm tonal coloration and steady output unmatched by synthetic alloys.
As rare earth elements face volatile supply disruptions, modern metallurgical R&D is focusing on hybrid permanent magnet configurations. Zhejiang Laysun Magnetics is currently researching advanced anisotropic sintered Alnico structures with improved coercivity. By introducing micro-alloying elements and utilizing advanced magnetic field heat treatment, we are aiming to double the energy product of standard Alnico to bridge the gap between traditional metals and modern rare-earth magnets.
Sustainability is driving innovation. Our technical roadmap incorporates eco-friendly binder jetting 3D printing of Alnico magnets. This allows the production of complex geometries with zero tooling waste, paving the way for optimized, lightweight rotor components for next-generation aerospace generators.
How Laysun Magnetics optimizes manufacturing value for international partners.
Zhejiang Laysun Magnetics maintains long-term supply agreements with leading state-owned mineral hubs. This guarantees stable access to high-purity Cobalt, Nickel, and rare earth precursors (Neodymium, Dysprosium), buffering our clients from market price shocks.
Our 100,000 square meter factory controls the entire manufacturing loop: from raw metal induction melting to vacuum sintering, continuous heat treatment under intense magnetic fields, precision grinding, and 100% automated flux testing.
Our corporate headquarters in Hangzhou enables rapid coordination with global shipping lanes. With nearby access to Ningbo and Shanghai deep-water ports, we offer multi-modal freight setups to streamline delivery times to Europe, the Americas, and Southeast Asia.
At Zhejiang Laysun Magnetics, our operation rests on four pillars: Quality, Credibility, Technology, and Innovation. As an ISO 9001, ISO 14001, and ISO 18001 certified company, we perform strict visual inspections and precision testing to ensure every magnet shipped aligns with our clients' specifications.
Empowering precision movement, sensing, and holding technologies across international markets.
Our advanced permanent magnets are certified to meet international standards. We supply API 6D, API 607, CE, ISO9001, ISO14001, and ISO18001 compliant materials. This ensures smooth import clearance and seamless integration into critical automotive, medical, and defense supply lines.
Global customer support, commercial trade operations, and engineering consulting.
100,000 m² primary manufacturing facility dedicated to heavy sintering and chemical processing.
Expert answers to common engineering questions regarding selection, design, and performance.
Review additional precision-made magnetic systems engineered for high mechanical stress and demanding parameters.
Laysun Magnetics
