Engineered Rare Earth solutions designed to meet precise magnetic orientation, flux density, and dimensional tolerances.
At Zhejiang Laysun Magnetics Ltd., we bridge the gap between complex industrial designs and reliable magnetic chemistry. Sintered Neodymium-Iron-Boron (NdFeB) represents the pinnacle of modern magnetics, providing unmatched energy products (BHmax) up to 52 MGOe.
Operating from our 100,000 square meter high-tech manufacturing plant in Suining, Sichuan, we maintain control over the entire metallurgy process: from vacuum induction melting and strip casting to jet milling, magnetic field alignment, sintering, and electroplating. Watching our raw manufacturing sequence demonstrates how we consistently meet the sub-micron tolerances required by today's EV motors and medical diagnostic instruments.
An authoritative analysis of magnetic chemistry, material grades, coating technologies, and the economics of global OEM procurement.
Sintered Neodymium magnets (NdFeB) are highly anisotropic materials, processed through powder metallurgy. The grade of the magnet (e.g., N35, N52, 45SH, 38EH) indicates its Maximum Energy Product (BHmax) in MegaGauss-Oersteds (MGOe) and its intrinsic coercivity (Hcj), which determines its thermal stability.
Selecting the correct grade is a balance between raw magnetic pull strength and the environment's thermal challenges. For instance, while an N52 magnet offers the highest field density at room temperature, it loses magnetic performance rapidly if operating temperatures exceed 80°C. For industrial motors and automotive electric power steering (EPS), design engineers specify high-coercivity grades like H, SH, UH, EH, or AH, which integrate Dysprosium (Dy) and Terbium (Tb) to withstand temperatures up to 220°C without permanent demagnetization.
Due to the high iron content (~65%) in the NdFeB alloy, raw magnets are highly susceptible to oxidation and corrosion in humid or acidic environments. To secure long-term performance, Zhejiang Laysun Magnetics applies multi-layer coatings:
| Material Class | Grade Range | Max Working Temp | Typical Applications |
|---|---|---|---|
| Standard (N-Series) | N35 - N52 | 80°C (176°F) | Consumer electronics, packaging, sensor assemblies, magnetic rings. |
| Medium-High (H-SH Series) | 35H - 48SH | 120°C - 150°C | Servo motors, wind turbine generators, automotive actuators. |
| Ultra-Coercivity (UH-EH-AH) | 33UH - 38AH | 180°C - 220°C | EV main traction motors, aerospace sensors, high-temperature industrial pumps. |
China accounts for more than 85% of the world’s rare earth refining and NdFeB magnet manufacturing capability. By establishing our manufacturing plant in Sichuan—close to primary mining and separation assets—Zhejiang Laysun Magnetics bypasses intermediate supply chain loops, locking in competitive rates for raw Neodymium (Nd), Praseodymium (Pr), and heavy rare earths (Dy, Tb).
This localization translates to a direct cost advantage for global buyers, stabilizing our price lists against extreme commodity market swings. Furthermore, our 5,000-ton annual output guarantees high volume order scalability without production bottlenecks.
From micro-actuators in smartphones to multi-megawatt wind turbine rotors, our magnets power global industrial technologies.
Understanding the complexities of transporting magnetic materials is a critical component of our global service framework. Sintered Neodymium magnets are classified as "Dangerous Goods" under international transit laws (IATA Class 9) if their magnetic field is not properly shielded, as they can disrupt airplane navigation systems.
To simplify the procurement process for our global partners, Zhejiang Laysun Magnetics Ltd. provides complete air and sea cargo shielding services. We utilize specialized multi-layer packaging (interspersed steel plates and non-conductive wood/foam layers) to neutralize external magnetic fields to below 0.0052 Gauss at 15 feet. This permits seamless transport via standard commercial carriers without logistical delays.
Our worldwide shipping footprint, backed by active customs brokerages in Europe, the United States, and Asia, guarantees on-time delivery directly to your production lines.
Addressing the technical, commercial, and logistical challenges encountered by procurement officers and magnetic engineers.
The price list is determined by: 1) Raw Material Market Index (fluctuations in Neodymium, Praseodymium, Dysprosium, and Terbium prices); 2) Chosen Grade (higher coercivity SH/UH grades require expensive heavy rare earths); 3) Coating specifications (standard Ni-Cu-Ni is more economical than custom Teflon or Parylene); 4) Geometric Complexity and machining tolerances; 5) Volume scale discount tiers.
All materials produced by Laysun are systematically tested and certified. Our coatings are free of Lead, Mercury, Cadmium, and Hexavalent Chromium. We maintain full traceability files for European and North American customs clearance, ensuring that every import batch complies with the latest RoHS and REACH chemical guidelines.
We strongly advise against post-magnetization machining. Sintered Neodymium is highly brittle, hard, and chemically reactive. Machining generates extreme heat, which will demagnetize the material, and cracks the protective plating, exposing the inner alloy to rapid oxidation and degradation. All machining must occur before magnetization and plating.
For custom sizes and geometries, we typically complete custom tooling and raw sintering within 10 to 15 business days. Surface finishing, quality testing, and magnetization add another 5 days. For standard catalog shapes, samples can be prepared and dispatched within 3-5 days.
For high-humidity or sub-sea environments, a double coating of Epoxy or a specialized Plastic/Rubber casing is optimal. For medical devices, Parylene coating provides a biocompatible layer that resists bodily fluids and chemical sterilization processes.
We execute standard quality control protocols including Hysteresisgraph testing to confirm demagnetization curves, salt spray tests for coating integrity, dimensional checks using automated optical measurement systems, and flux testing to guarantee magnetic consistency across all batches.
Explore our highly-requested industrial designs, built for industrial wear, mechanical mounting, and electronic applications.
Established at the turn of the millennium in 1999, Zhejiang Laysun Magnetics Ltd. has evolved from a local manufacturer into a state-certified high-tech enterprise. Our modern 100,000 square meter factory floor hosts vacuum induction furnaces, automated jet mills, inert-gas alignment chambers, and multi-stage electroplating lines.
Our team of 300 experienced professionals handles every aspect of production, from initial powder metallurgy formulation to final quality inspections. This strict operational standard allows us to produce 5,000 tons of rare earth magnets annually, serving major sectors including industrial automation, automotive drive systems, wind power, and premium consumer electronics.
Submit your project parameters and target specifications (dimensions, grade, coating, and quantities). Our engineering team will review the details and provide a formal quote within 24 hours.
API 6D, API 607, CE, ISO9001, ISO14001, ISO18001, TS certifications. All production lines follow strict international quality controls.
Laysun Magnetics