The difference between grinding steel balls and wear-resistant steel balls
Friends who frequently come into contact with steel balls often hear about wear-resistant steel balls and grinding steel balls. Do they share the same meaning, but with different names? Actually, there is a difference between the two.
Wear-resistant steel balls, as the name suggests, are wear-resistant steel balls. To be wear-resistant, one must have a high hardness, usually reaching a Rockwell hardness of HRC58 or above. Only such steel balls can truly achieve wear resistance, which is the professional term for low wear. In reality, many steel balls with a hardness lower than HRC58, also known as wear-resistant steel balls, are not actually wear-resistant and have high wear.
Grinding steel balls, as the name suggests, are steel balls used for grinding things, which are a type of grinding medium. Therefore, wear-resistant steel balls are also a type of grinding steel balls, and wear-resistant and non wear-resistant steel balls belong to the category of grinding steel balls as long as they are used for grinding. For example, large quantities of cast balls (high chromium balls, medium chromium balls, low chromium balls), forged balls, rolled steel balls, etc.
The most important data on whether the grinding steel ball is wear-resistant is hardness testing, which can be tested using a Rockwell hardness tester. Practice has shown that the service life of steel balls above HRC60 is twice that of HRC40-50.
Of course, the higher the hardness, the better. It depends on what kind of material is being ground, and the hardness of this material is used to determine which type of steel ball is more suitable.
