Select from our highly requested custom designs featuring precision engineering, premium coatings, and advanced magnetic properties.
Founded at the turn of the millennium in 1999, Zhejiang Laysun Magnetics Ltd. has evolved from an ambitious high-tech startup into an internationally recognized market leader in the research, manufacturing, and supply of rare earth permanent magnets. Headquartered in Hangzhou, with a manufacturing powerbase covering over 100,000 square meters in Suining, Sichuan, we operate with a dedicated workforce of 300+ professionals. Our state-of-the-art smelting, sintering, and machining facilities achieve an annual output of over 5,000 tons of high-performance NdFeB magnets, ensuring reliable, large-scale supply chains for multinational corporations.
Our core manufacturing specialties focus on high-performance Sintered and Bonded Neodymium-Iron-Boron (NdFeB) solutions. By optimizing the microstructures of neodymium magnetic matrices and refining cutting-edge electroplating options, including our proprietary Gold (Au) coating process, we provide magnets with unparalleled corrosion resistance, biocompatibility, and magnetic field stability at temperatures up to 220°C.
In high-reliability engineering, standard NdFeB magnets are highly susceptible to oxidation due to their reactive iron phase. To combat this, advanced surface treatments are required. Our Gold (Au) coating represents the pinnacle of surface engineering, utilizing a multi-layer protective system (Ni-Cu-Ni-Au) with a total thickness of 12-25 microns. The pure gold outer layer provides not only an aesthetically brilliant finish but also exceptional properties: excellent electrical conductivity, low contact resistance, resistance to high-humidity salt sprays, and complete biocompatibility for medical applications.
Understanding these magnetic properties involves key metrics: Remanence ($B_r$), Coercivity ($H_c$), and Maximum Energy Product ($(BH)_{max}$). When you opt for Laysun's OEM Gold-plated magnets, we maintain tight tolerances down to ±0.05mm and utilize premium dysprosium (Dy) and terbium (Tb) grain boundary diffusion techniques (GBD) to enhance temperature stability, minimizing thermal demagnetization in heavy-duty electric motors and automotive sensors.
| Material Grade | Remanence ($B_r$) [kG] | Coercivity ($H_{cb}$) [kOe] | Intrinsic Coercivity ($H_{cj}$) [kOe] | Max Energy Product ($(BH)_{max}$) [MGOe] | Max Working Temp [°C] |
|---|---|---|---|---|---|
| N35 - N52 (Standard) | 11.7 - 14.8 | ≥ 10.5 | ≥ 12.0 | 33 - 53 | 80 |
| 35M - 50M (Medium Temp) | 11.7 - 14.3 | ≥ 11.0 | ≥ 14.0 | 33 - 51 | 100 |
| 35H - 48H (High Temp) | 11.7 - 13.9 | ≥ 11.1 | ≥ 17.0 | 33 - 49 | 120 |
| 33SH - 45SH (Super High) | 11.3 - 13.6 | ≥ 10.8 | ≥ 20.0 | 31 - 46 | 150 |
| 30UH - 42UH (Ultra High) | 10.7 - 13.0 | ≥ 10.2 | ≥ 25.0 | 28 - 43 | 180 |
| 30EH - 38EH (Extra High) | 10.7 - 12.5 | ≥ 9.8 | ≥ 30.0 | 28 - 39 | 200 |
| 28AH - 35AH (Extreme High) | 10.2 - 12.1 | ≥ 9.5 | ≥ 33.0 | 26 - 36 | 220 |
Located in Suining, Sichuan, Laysun enjoys direct access to one of China's primary rare earth separation and extraction hubs. Sourcing heavy and light rare earth elements directly within the province dramatically reduces raw material transportation costs and mitigates volatility in global neodymium pricing.
Our production facilities utilize automated vacuum induction melting (VIM) furnaces and strip casting systems. These high-vacuum setups eliminate impurities and create ultra-homogeneous alloy ribbons, giving us strict control over grain size distributions before powder milling.
Operating a sprawling 100,000m² manufacturing complex with a highly skilled workforce of 300 professionals allows us to scale manufacturing processes, passing significant cost savings to our OEM partners without compromising on mechanical tolerances or magnetic stability.
Magnetic solutions are key to modern industrial automation. Zhejiang Laysun Magnetics Ltd. designs and manufactures high-performance permanent magnets customized for specific, demanding applications:
As the international community shifts toward clean energy, demand for ultra-high coercivity NdFeB magnets has soared. Procurement teams now require strict ESG (Environmental, Social, and Governance) compliance alongside high performance. Recycling programs and low-carbon production are critical factors for major tech buyers in North America and Europe.
Furthermore, structural designs are moving toward miniaturization and automation. Components must be lighter and smaller yet deliver higher magnetic flux density. This necessitates advanced manufacturing tolerances. We continue to invest in automated optical inspection systems and 3D coordinate measuring machines (CMM) to guarantee consistent dimensional performance across multi-million piece orders.
Our global sales and customer support operations are headquartered in Hangzhou, China, to serve international partners.
Located in Suining, covering 100,000 m² of highly automated rare earth sintering and electroplating production lines.
We hold certifications for API 6D, API 607, CE, ISO9001, ISO14001, ISO18001, and IATF 16949. Our state-of-the-art laboratory performs automated QA/QC testing, magnetic properties assessment, and environmental chamber testing.
Expert answers to the most common questions regarding gold magnetic properties and OEM neodymium magnet sourcing.
High-performance magnets engineered specifically for voice coil motors, automotive EPS systems, power generation, and structural lifting applications.
For custom parameters, gold-coating specifications, or volume pricing on rare earth neodymium magnets, please contact our engineering support team directly. We provide complete magnetic analysis reports and quotation breakdowns.
Headquarters: Hangzhou, Zhejiang Province, China
Manufacturing Base: Suining Development Zone, Sichuan, China
Sales & RFQs: For custom quotes, please send your technical drawings (STEP/DWG format) and magnet grade requirements to our global team.
Laysun Magnetics