Premium rare earth components optimized for high-reliability applications, delivered directly to developers and manufacturers across Southern California.
Founded in 1999, Zhejiang Laysun Magnetics Ltd. has established itself as an industry-leading, national high-tech enterprise. Specializing in the research, development, engineering, and manufacturing of sintered rare earth NdFeB permanent magnets, we serve as a vital link in the supply chains of electric vehicles (EV), precision aerospace actuators, industrial robots, and high-fidelity acoustics globally.
Our expansive 100,000 m² state-of-the-art production complex produces 5,000 tons of rare earth magnets annually. Backed by a dedicated workforce of over 300 skilled engineers and metallurgical technicians, we maintain absolute control over the entire manufacturing lifecycle, from raw material smelting to final vacuum plating.
Years of Industrial Innovation
Advanced Production Facilities
Annual Sintered Magnet Capacity
Metallurgy & Engineering Experts
A comprehensive examination of metallurgical trends, mechanical performance, and supply chain security for modern engineering projects.
Greater Los Angeles represents one of the world's most dense concentrations of aerospace innovation (Hawthorne, El Segundo, Long Beach), electric mobility pioneers, and autonomous marine robotics startups. Each of these industries relies heavily on high-energy-density NdFeB magnets. Standard commercial magnets often fail under the extreme conditions required by sub-orbital aerospace flight, marine corrosion, or high-RPM automotive motors. Achieving reliable performance requires specialized metallurgical formulations developed for the unique application environments of local contractors.
Standard grade Neodymium magnets begin to lose magnetic properties irreversibly at temperatures above 80°C. For industrial environments, Laysun Magnetics manufactures customized high-temperature grades (M, H, SH, UH, EH, AH). By adding heavy rare earth elements (HREE) like Dysprosium (Dy) and Terbium (Tb), we increase intrinsic coercivity, allowing stable operations at up to 230°C. Selecting the precise grade involves balancing maximum energy product (BH)max and temperature tolerance to prevent unexpected in-field demagnetization.
Rare earth magnets are inherently prone to oxidation due to their high iron content (approx. 65%). For the coastal and marine environments of Los Angeles and Long Beach, proper plating is critical. Laysun provides robust surface finishes, including Multi-Layer Nickel-Copper-Nickel (Ni-Cu-Ni), high-durability Epoxy resins, Zinc (Zn) passivation, and specialty Parylene coatings. These advanced barriers protect the magnetic core from salt spray, humidity, and chemical solvents, ensuring operational lifespans exceeding 20 years.
Understanding the mechanical and magnetic thresholds of different sintered NdFeB classifications facilitates precise engineering designs.
| Material Class | Remanence (Br) - kGs | Coercivity (Hcb) - kOe | Intrinsic Coercivity (Hcj) - kOe | Max Energy Product (BHmax) - MGOe | Max Operating Temp (°C) |
|---|---|---|---|---|---|
| N35 - N52 (Standard) | 11.7 - 14.8 | ≥ 10.5 - 11.2 | ≥ 12.0 | 33 - 53 | 80 |
| N35M - N50M (Medium) | 11.7 - 14.3 | ≥ 11.1 - 11.5 | ≥ 14.0 | 33 - 51 | 100 |
| N33H - N48H (High) | 11.3 - 13.9 | ≥ 10.5 - 11.0 | ≥ 17.0 | 31 - 49 | 120 |
| N30SH - N45SH (Super High) | 10.8 - 13.6 | ≥ 10.1 - 10.7 | ≥ 20.0 | 28 - 46 | 150 |
| N28UH - N40UH (Ultra High) | 10.2 - 12.8 | ≥ 9.6 - 10.2 | ≥ 25.0 | 26 - 41 | 180 |
| N28EH - N38EH (Extra High) | 10.2 - 12.5 | ≥ 9.0 - 9.8 | ≥ 30.0 | 26 - 39 | 200 |
Procuring raw magnetic materials at scale requires robust logistical integration to keep assembly lines running smoothly. Zhejiang Laysun Magnetics operates with deep integration into global shipping lanes, moving large-scale annual contracts through direct cargo routes from China's coastal hubs to the Port of Los Angeles and Port of Long Beach. This direct pipeline minimizes transit times and ensures stable shipping schedules.
Additionally, we maintain full compliance with complex global regulatory frame works. For defense contractors and critical technology builders in Southern California, we provide transparent chemical testing reporting (RoHS, REACH) and detailed demagnetization curves to streamline domestic testing and certification processes.
Providing high-precision magnet solutions engineered for high performance in demanding operational environments.
Addressing key technical and metallurgical questions asked by system integrators, design engineers, and global procurement departments.
We mitigate demagnetization through precise alloy formulations, introducing Dysprosium and Terbium to increase the material's intrinsic coercivity (Hcj). We also subject all design variations to Finite Element Analysis (FEA) modeling. This simulates thermal and reverse-field demagnetization curves to ensure the magnetic assemblies perform reliably under target operational tolerances.
For custom geometries, prototyping and tooling development take approximately 10-15 days. Production run processing requires 20-25 days. Fast shipping options to Los Angeles, including air freight, take 5-7 business days, while standard ocean freight direct to the Port of Los Angeles takes 18-22 days.
For high-humidity or marine applications, standard zinc or single-layer nickel plating is typically insufficient. We recommend double-barrier systems: a base of multi-layer Ni-Cu-Ni followed by an organic Black Epoxy or a vacuum-deposited Parylene coating. This combination passes ASTM salt spray test standards exceeding 120 hours without degradation.
As an IATF 16949 certified factory, Zhejiang Laysun Magnetics monitors the entire production cycle from alloy smelting and hydrogen decrepitation to sintering, machining, and final magnetic measurement. Each production batch undergoes testing via ICP-OES spectroscopy to confirm alloy composition, and hysteresisgraph testing is completed to verify magnetic parameters prior to dispatch.
Explore our complete catalog of precision-manufactured permanent NdFeB products, featuring custom dimensions, grades, and premium finishes.
Laysun Magnetics