... , Boron and some other transitive metallic elements to make it strong. 2.Grade:N33-N52,N33M-N50M,N33H-N48H,N35SH-N45SH,N30UH ... Specifications 1.High remanence,high coercive force,high magnetic force. 2.Excellent cost to performance ratio 3.Perfect Consistence 4.Low ... weight loss 5.small size, metallic in appearance. 6.Super strong magnetic force and high intrinsic coercive force and also with ...