What is JIS G4805-2019?

JIS G4805-2019 is a Japanese Industrial Standard that specifies the requirements for high-carbon chromium bearing steels. It covers the chemical composition, mechanical properties, heat treatment, and inspection methods for these steels.

Chemical Composition

According to JIS G4805-2019, the chemical composition of high-carbon chromium bearing steels should meet specific requirements. These steels must contain a certain amount of carbon, chromium, and other elements such as silicon, manganese, and phosphorus. The precise composition varies depending on the grade of the steel.

Mechanical Properties

In terms of mechanical properties, JIS G4805-2019 sets out the necessary characteristics for high-carbon chromium bearing steels. This includes requirements for hardness, toughness, wear resistance, and dimensional stability. These properties are crucial for ensuring the performance and durability of bearings made from these steels.

Heat Treatment and Inspection

The standard also provides guidelines for the heat treatment of high-carbon chromium bearing steels. Heat treatment processes such as quenching and tempering are essential for achieving the desired properties in the steel. Additionally, JIS G4805-2019 specifies the inspection methods that should be employed to ensure the quality and conformity of these steels.

In conclusion, JIS G4805-2019 is an important standard for high-carbon chromium bearing steels. By defining the chemical composition, mechanical properties, heat treatment, and inspection methods, this standard helps to ensure the reliability and performance of these steels in various applications.