... can affect the cutting wheel hardness:The amount of resin bond to join,Forming density of abrasive,Sintering temperature ... /AO/SA raw material with special material;2.Imported resin bonded makes our wheel/disc stronger;3.Two reinforce ... example ferrous metal,nonferrous metal,mild steel,alloy steel,stainless steel,cast steel,high tensile steel,steel tubes,steel pipe,steel bar,angle iron,cast iron etc ...