Grades and physical properties of Sintered NdFeB magnets


Note:
•    All data of magnetic parameters and physical properties are measured at room temperature of 20 oC
•    Maximum service temperature of magnet may vary due to its shape and magnetic circuit factors.
•    Density range: 7.4 ~7.6g/cm3; reversible temperature coefficient Br: -0.09 ~ -0.13%/oC; iHc: -0.50 ~ -0.80%/oC;
•    Curie Temperature Tc: N series, 312oC; M series, 320oC; H series, 330oC; SH series, 340oC; UH and EH series, 380oC
•    Symbol “N” in grade name stands for the normal coercivity magnets; “M”, “H”, “SH”, “UH” and “EH” stand for the medium, high, super, ultra and extreme coercivity magnets, respectively:'



L-T SERIES MAGNETS

Normally Sintered NdFeB magnet will be rusted without any coating  ,                        
so magnets will be coated with Nickel , Epoxy or Parylene accordingly .                        
But now more and more magnets to be used in elevotors and motors application,                         
the customers need higher requirements on Corrosion Resistance of sineted NdFeB magnets ,                        
In order to meet these requirements , our R&D team develop NdFeB magnet with feature of                        
low temperature coefficient and low weight loss .                    

    
Please check the following tabelfor more details:   


Low weight loss test data                
☆ Two standards for low weight loss test                 
→ USA PCT (121℃ ±1℃ ,2atm,100%RH)                
→ EUROPE PCT (130℃ ±2℃ ,3atm,100%RH) 

☆ Relationship between weight and testing time