
90W-7Ni-3Fe tungsten alloy ball has incredible strength, consistent durability and long-lasting value. It is especially used in precision instrument fields, such as mobile phone vibrator, clock cube, self-winding watches, anti-vibration toll holders, flywheel weights and more. The properties of 90W-7Ni-3Fe tungsten alloy ball are: Alloy Type:W 90%、Ni 7%、Cu 3% MIL-T-21014: Class 1 SAE-AMS-T-21014: Class 1 AMS 7725 C: 7725 C ASTM B777-87: Class 1 Density: 17.1 g/cc and 0.614 lbs/ in3 Hardness Rockwell: 25 C Ultimate Tensile Strength Min: 120,000…