1.It is made of hard mental and cement carbide 2With high hardness and strong abrasion resistance 3Tungsten steel,tungsten cop It is made of hard mental and cement carbide,with high hardness and strong abrasion resistance.Here provide RD30,RD50,FD15,FD25.High hardness:86-93HRA which is equal to 69-81hrc; Good hot hardness:900-1000°C;long life.Tungsten Steel,tungsten copper ,silver tungsten. ...