ASTM G99 is the globally recognized standard for measuring the wear and friction characteristics of material pairs using a or ball-on-disk apparatus. This standard provides a laboratory procedure to evaluate how materials behave when sliding against each other under controlled conditions, making it essential for industries like automotive, aerospace, and medical implants. The current active version of this standard is ASTM G99-23 . Overview of ASTM G99
Usually a cylindrical pin with a flat end or a spherical ball. Common dimensions for pins are 6–12mm in diameter and 25–30mm in length. astm g99 pdf
The standard specifies the pin-on-disk tribometer requirements: ASTM G99 is the globally recognized standard for