Alloy mould: Diamond sand wheel. Hard alloy Alloy moulds:Grade : J101,J901,F23,YWN15,YGX15,YGX1,YG8T,YG15C,YG20C1:Characteristics of Alloy moulds:A: Hard alloy ... tenacity resistant to high speed repetitive impact.YWN15: The alloy is for moulds forming magetic products such as NdFeB magn ... magets as well as batteries.One of the National 6.5 projects certified by a national institute.YGX1:Used in ...