3.5mm 3.969mm 4mm 4.5mm 4.763mm 3/16inch Shine Bright Surface Zirconia Ceramic Ball for Valve Part/Ball Bearing/Bearing

3.5mm 3.969mm 4mm 4.5mm 4.763mm 3/16inch Shine Bright Surface Zirconia Ceramic Ball for Valve Part/Ball Bearing/Bearing. High Temperature Resistance: Working temperature reaches 700-800 degrees Celsius with thermal shock resistance up to 200 degrees. Superior Hardness: Hardness ranges from 85-90 with Moh's hardness greater than 6.5 and Vickers hardness of 1300. Chemical Stability: Resistant to acid, alkali, and organic solvents with acid resistance over 99.6% and alkali resistance over 85%. Customizable Sizes: Available sizes range from 1mm to 50.8mm or can be customized according to customer drawings and requirements. Low Water Absorption: Features low water absorption rate of less than 0.5% and low bulk density for reduced centrifugal load. Self-Lubricating: Designed with self-lubricating properties, eliminating the need for external lubricants in operation. High Crush Strength: Offers exceptional crush strength up to 56 KN for 2-inch balls, ensuring durability under pressure. ISO Certified Quality: Manufactured with advanced technology and certified by ISO9001, ISO14001, and RoHS standards.