The hardness of steel balls is generally tested using a Rockwell hardness tester, and is usually expressed as HRC+ value.
1. The hardness of bearing steel balls is generally HRC60-66; 2. The hardness of stainless steel balls is generally around HRC26; 3. The hardness of carbon steel balls is generally HRC55-65.
4. The hardness of the soft carbon steel ball is approximately HRC30;





















