we could produce Tungsten powder , according to the standard :GB/T3458-1982 1.Molecular Formula:FW 2.Appearance: Tungsten powder is dark grey.Spaying tungsten powder bright grey 3.Application: mostly used as material for production of Tungsten plate, bar and Cemented carbide products4.Contents:TUNGSTEN POWDER Grade: 1.FW-1: W≥99.95% 2.FW-2: W≥99.8%Impurity Content:GradeFW-1FW-2Impurity Content % ...