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Similarities and differences between bearing steel balls and stainless steel balls

Update:06-09-2021
Summary:

There are also different types of steel balls. The gene […]

There are also different types of steel balls. The general classification is based on its metallographic morphology. This can be divided into stainless steel balls and bearing steel balls, as well as carbon steel balls. So what is the difference between stainless steel ball, bearing steel ball and carbon steel ball. Are there similarities? The main and obvious difference is the rust resistance.

Stainless steel balls, no matter which grade of stainless steel balls, have a certain degree of rust resistance. But the bearing steel ball does not have any rust resistance. However, among the stainless steel balls, different grades of steel balls have different rust resistance. According to the brand, the stainless steel balls with the prefix "3", such as 304, 304L, 316, 316L, etc., have good rust resistance. Stainless Steel Ball Because it contains more chemical element nickel content. In addition, there are stainless steel balls with the prefix "4", which also contain a certain degree of rust resistance. But at the same time it contains relatively high carbon elements. Such as stainless steel ball 440/440C, stainless steel ball 420/420C, etc.

Bearing steel balls are more wear-resistant, and the precision of the steel balls is also very good. What is lacking is rust resistance. Therefore, many bearing steel balls need to be coated with anti-rust oil immediately after they are finished to achieve the effect of anti-rust.