Ø3mm tungsten heavy alloy ball price is 67.00USD/KG on Oct. 29, 2019. The composition of the rod is 75WNIFE with density of about 14~15g/cm3. The ball is uniformly hardened and tempered throughout their entire diameter to achieve maximum strength and quality. Ball hardness is controlled within the 60-67 HRC range as measured on parallel flat surfaces. Custom heat treating is available for special hardness and dimensional stability requirements.