N55sh

N55SH represents a high-energy grade of Neodymium (NdFeB) magnets with superior temperature resistance. The 'N55' refers to a Maximum Energy Product (BHmax) of 52-55 MGOe, while the 'SH' suffix indicates a high intrinsic coercivity (Hjc) of ≥20 kOe, allowing the magnet to operate effectively at temperatures up to 150°C (302°F) without significant irreversible demagnetization. When sourcing, you must verify the remanence (Br) typically ranging between 1.47-1.52 Tesla.

Due to their extreme magnetic strength and thermal stability, N55SH magnets are primarily used in high-performance electric motors, automotive sensors, wind turbine generators, and aerospace components. They are also ideal for miniaturized medical devices where maximum magnetic force is required within a limited spatial footprint. Their ability to withstand 150°C makes them the gold standard for under-the-hood automotive applications and industrial automation.

Ensure the supplier is ISO 9001:2015 certified for quality management. For electronics and global trade, products must be RoHS and REACH compliant to ensure they are free from hazardous substances. For specialized industries like automotive, look for IATF 16949 certification. Always request a Demagnetization Curve (Hysteresis Loop) report for the specific batch to confirm the magnetic properties meet the N55SH grade requirements.

Neodymium magnets are highly prone to corrosion. You should specify coatings based on the environment: Ni-Cu-Ni (Nickel) for standard protection, Zinc (Zn) for cost-effectiveness, or Epoxy for superior moisture and salt spray resistance. Demand a Salt Spray Test (SST) report, typically requiring 24 to 96 hours of resistance depending on your application's severity.

The biggest risk is Grade Substitution, where a supplier provides N52 or N50SH instead of N55SH to save on raw material costs (Dysprosium/Terbium). To mitigate this, use third-party inspection services to conduct magnetic flux testing before shipment. Another risk is Magnetic Leakage during transit, which can interfere with aircraft navigation; ensure the supplier uses specialized magnetic shielding packaging that complies with IATA PI953 regulations for air freight.

Leverage the raw material price index for PrNd (Praseodymium-Neodymium) during negotiations, as magnet prices fluctuate with rare earth market trends. For security, conduct transactions through Made-in-China.com's secured payment services to ensure funds are only released upon proof of shipment. Request a tiered pricing model where the unit price drops by 10-15% for volumes exceeding 5,000 pieces.

Magnets are classified as 'Dangerous Goods' for air transport if not properly shielded. Ensure your supplier provides a Magnetic Test Report for Air Transport. For sea freight, ensure the inner packaging includes desiccant packs and vacuum sealing to prevent oxidation during long transit times in humid maritime environments. Always clarify Incoterms (e.g., FOB or DAP) to understand who bears the cost of customs clearance and import duties.