Neodymium Magnet (N48SH)

Description

1. Product Overview

The Neodymium Magnet (N48SH) is a high-energy, rare-earth permanent magnet engineered for extreme-temperature stability and maximum magnetic flux density. It is primarily used in advanced electric vehicle (EV) traction motors, high-performance industrial servos, and wind turbine generators where thermal resilience up to 150°C is critical. Its strategic value lies in enabling higher power-to-weight ratios and operational reliability under thermal stress—directly addressing the industry shift toward compact, efficient electrification systems.

2. Key Specifications & Technical Characteristics

• Chemical composition: Nd₂Fe₁₄B (Neodymium-Iron-Boron) with dysprosium and terbium additions for high coercivity

• Grade / Performance class: N48SH (Br: 13.6–14.0 kGs; Hcj: ≥ 20 kOe; Hcb: ≥ 11.5 kOe; (BH)max: 46–48 MGOe)

• Physical characteristics:

  • Form: Precision-sintered blocks, discs, rings, or custom CNC-machined shapes

  • Density: 7.5–7.6 g/cm³

  • Max operating temperature: 150°C (linear demagnetization curve)

  • Coating options: Ni-Cu-Ni (standard), Epoxy, Passivation, or Zn

• Packaging: Vacuum-sealed anti-corrosion bag + magnetically shielded cartons; desiccant included

• Shelf life: ≥10 years if stored below 40°C / <60% RH, un-magnetized state (delivery: fully magnetized unless specified)

3. Core Industrial Applications

• Primary industries: Automotive (EV/HEV), industrial robotics, aerospace actuators, high-speed spindles, medical imaging (MRI ancillary assemblies)

• Specific use cases:

  • EV rotor assemblies – maintains torque stability at sustained 140°C motor temperatures

  • Servo motor feedback systems – minimal flux loss over 20,000+ thermal cycles

  • Wind turbine pitch drives – corrosion-resistant coating integration with IP54 housings

• Performance advantage over alternatives:

  • Beats N42SH by 9% higher energy product, reducing motor length by ~12% for same torque

  • Outperforms ceramic ferrites in temperature stability (loss <3% at 150°C vs. >15% for ferrite)

  • Higher coercivity than standard N48 – eliminates irreversible demagnetization under load spikes

4. Competitive Advantages

• Quality consistency: Lot-to-lot BH curve deviation <±2%; 100% flux testing via Helmholtz coil; ISO 9001:2025 and IATF 16949 certified

• Supply reliability: 60-ton monthly capacity; 6-week lead time for standard shapes; buffer inventory held in regional hubs (Americas, EMEA, APAC)

• Logistics capability: Shock-resistant palletization with gauss-meter QA before dispatch; air and ocean options available

• Price competitiveness: Direct-sintered Chinese primary supply chain – 12–18% below EU/US specialty magnet houses for equivalent N48SH spec

• Sustainability & documentation: Conflict-free rare earth sourcing (REE audit trail); REACH and RoHS compliant; full material test reports (MTR) and FEA-ready BH curve data provided upon shipment

5. Commercial & Supply Information

• Minimum order quantity (MOQ): BULK 20MT (mixed dimensions allowed)

• Loading capacity: 22–24 MT per standard 20-foot container (depending on coating type and shape density)