High-performance permanent magnetic solutions engineered for global industrial and micro-motor architectures.
An authoritative deep dive into soft magnetic carriers and their symbiotic performance with permanent NdFeB systems.
In modern industrial magnetic circuit design, the choice of yoke materials dictates the efficiency, flux concentration, and operational limits of the entire system. Low carbon steels—specifically those containing carbon levels below 0.10% (such as AISI 1006, 1008, or ultra-low carbon electric steels)—serve as the foundational backbone for high-performance magnetic assemblies. By understanding their intrinsic electromagnetic attributes, developers can significantly minimize core losses, mitigate magnetic saturation, and maximize the energy output ($(BH)_{max}$) of high-energy NdFeB permanent magnets.
Low carbon steels possess an exceptionally high maximum relative magnetic permeability ($\mu_r$) compared to alloy steels. This property measures the material's ability to support the formation of a magnetic field within itself. Under an applied external magnetic field ($H$), the magnetic domains within the low carbon steel align rapidly, yielding high magnetic flux density ($B$). The narrow hysteresis loop typical of high-purity low carbon steel indicates low coercivity ($H_c$) and minimal core loss, categorizing it as an outstanding soft magnetic material. The high saturation magnetization ($B_s \approx 2.1$ Tesla) ensures that the steel can guide and concentrate high-density magnetic flux without reaching saturation limits prematurely, making it perfect for motor stator poles, sensor housings, and flux return paths (yokes).
Enables maximum flux carrying capacity up to ~2.15 Tesla, allowing engineers to design thinner, lighter return yokes without incurring magnetic leakage or saturating the circuit.
Maintains minimal residual magnetization when demagnetized, crucial for high-speed alternating fields in dynamic industrial motors and precision voice coil actuators.
Combines reliable physical structural properties with excellent ductility, facilitating ultra-tight tolerances during CNC machining of complex custom yokes and magnetic rings.
| Material Standard | Carbon Content (%) | Max Permeability ($\mu_r$) | Saturation Induction ($B_s$ - Tesla) | Coercivity ($H_c$ - A/m) | Primary Electromagnetic Use Case |
|---|---|---|---|---|---|
| AISI 1006 / SPCC | ≤ 0.06% | 3,500 - 4,500 | 2.08 - 2.12 | ≤ 120 | Standard Motor Yokes & Pole Pieces |
| AISI 1008 / DT4C | ≤ 0.08% | 3,000 - 4,000 | 2.05 - 2.10 | ≤ 150 | Custom Magnet Pots & Enclosures |
| Ultra-Low Carbon (Pure Iron) | ≤ 0.01% | 5,000 - 8,000 | 2.15 | ≤ 60 | High-Precision VCMs & Laboratory Shields |
Your Trusted National High-Tech Partner in Rare Earth Magnetics & Soft Magnetic Carriers
Founded in 1999, Zhejiang Laysun Magnetics Ltd. has built a reputation for pioneering technological excellence. With a sprawling 100,000 square meter state-of-the-art facility located in Suining, Sichuan, and headquarters in Hangzhou, China, our team of 300+ professionals ensures the delivery of up to 5,000 tons of premium rare earth magnets and specialized magnetic assemblies annually.
Our core capabilities center on high-performance rare earth NdFeB permanent magnets integrated with precision-machined low carbon steel yokes. We control the complete process from vacuum induction melting and jet milling to pressing, sintering, and electroplating.
Providing key components to power the global transition towards electrification and industrial automation.
The global demand for high-efficiency electromagnetic components is driven by major structural shifts: the adoption of electric vehicles, the miniaturization of consumer electronics, and the deployment of precision robotics. In each of these fields, combining a permanent magnet with a soft magnetic low carbon steel plate or pot is standard engineering practice to control the magnetic circuit.
In electric vehicles, Electronic Power Steering (EPS) systems require ultra-precise torque feedback and reliable performance. Sintered NdFeB arc segment magnets, paired with high-permeability low carbon steel rotor poles, ensure high torque density and low cogging torque. Zhejiang Laysun Magnetics offers custom-machined iron yokes designed to limit stray magnetic fields, keeping passenger cabins safe and preventing interference with nearby onboard electronics.
For modern robotic joints and drone BLDC motors, weight and power output are critical design constraints. Low carbon steel yokes allow engineers to use thinner sheets while maintaining high flux concentration. This optimization enables lighter motors, extending drone battery life and improving the dynamic response of industrial robotic arms.
High-precision rotor and stator assemblies engineered to provide rapid dynamic response and maximum power density for multi-axis joints.
Lightweight motor systems utilizing optimized low carbon steel yokes to maximize lifting capacity and increase power efficiency.
Drive motors, EPS sensors, and auxiliary actuators designed to meet strict automotive safety standards and withstand high operating temperatures.
Reliable permanent magnets and housings engineered to handle mechanical vibration and high current loads in professional-grade tools.
Micro-sized VCMs, acoustic drivers, and magnetic phone mounts designed for high packaging density and clean visual aesthetics.
Efficient compressor motors for air conditioning units and household appliances, designed to reduce vibration and operating noise.
Explore our diverse range of rare earth permanent magnets and engineered magnetic assemblies.
In globalized supply chains, raw material origin and compliance certification are as important as technical performance. Zhejiang Laysun Magnetics Ltd. provides complete material traceability, confirming that our low carbon steel substrates and rare earth elements comply with international standards. We maintain certifications for ISO 9001, ISO 14001, ISO 18001, API 6D, API 607, and CE.
Our quality management systems ensure consistent performance, minimizing magnetic drift across production batches. Whether your application requires compliance with RoHS, REACH, or Conflict Mineral declarations, we provide the documentation needed for direct entry into the European Union, Americas, and Asia-Pacific markets.
ISO9001 Quality Certified
ISO14001 Environmental Care
ISO18001 Safety Management
Innovating new magnetic material technologies for next-generation systems.
Developing ultra-low carbon steel with interstitial elements carbon and nitrogen under 50 ppm, pushing material saturation limits to 2.2 Tesla.
New multi-layer coatings combining chemical vapor deposition (CVD) with electrodeposited alloys to provide long-term corrosion resistance for harsh marine and automotive environments.
Integrating closed-loop scrap recycling processes to reclaim and reprocess rare earths, supporting global corporate sustainability targets.
The next decade of magnetic technology belongs to systems that achieve high efficiency with minimal environmental footprint. By refining raw material processing and developing integrated production lines that link permanent magnet sintering with precision soft magnetic steel pressing, Laysun Magnetics helps engineers minimize magnetic air-gap losses and build more efficient drive units.
Headquartered in Hangzhou, China, with production facilities and logistics networks designed to support customers worldwide.
Our main manufacturing hub in Suining, Sichuan handles raw material refining, vacuum smelting, sintering, and assembly. To improve delivery times, we manage distribution facilities near major shipping lanes in Zhejiang and Guangdong, facilitating sea, air, and overland freight.
Our engineering support teams provide design assistance during the early phases of magnetic circuit layout, finite element analysis (FEA) simulation, and mechanical design verification. We work with customer teams to optimize the fit and alignment between permanent magnets and low carbon steel yokes, reducing potential assembly errors.
Detailed answers to common engineering questions regarding soft magnetic materials and permanent magnet assemblies.
High-quality, cost-efficient magnetic solutions designed for demanding industrial applications.
Submit your specifications or structural drawings. Our application engineers will review your requirements and respond within 24 hours.
Laysun Magnetics