... graphite boat ,melted in a melting furnace at about 3000ºC,and held for a certain time to obtain alloy casting ... cost 2.Main Physical Specificationsitemchief components %Impurity Content,% MaxWT.C.F.C.FeCrVN.V.RTi+Ta+NbCo+Ni+MoYZ-Ⅰ95~963.9 ... ~75 YZ200~400f-200~+40075~38 YZ400f-40038 Physical and Mechanical Propertieshardness,HRAMicrohardness,kg/mm²Density,g/cm³Melting Point ...