1. 59%, lighter than steel balls, which means less centrifugal force and less grooving at high speed and acceleration. 2. The modulus of elasticity is 44%, which means less load deformation. 3. Rockwell hardness 92. 4. Smaller friction coefficient. 5. Only 1/4 of the coefficient of thermal expansion of steel can withstand high temperature. 6. Excellent surface finish can be achieved. Ra can be 4-6. 7. Can withstand high temperature, high hardness and strength up to 1050 degree C. 8. Never rust. There can be no lubricant. 9. More resistant to corrosion than steel. |