of their resistance. G65 is often used for The ASTM G65 standard - "Standard Test Method for Measuring Abrasion Using the Dry Sand/Rubber Wheel Apparatus" - is one of the most widely used laboratory procedures for evaluating the abrasion resistance of metallic materials and coatings. In this test, a rubber wheel is rotated against a flat specimen while a controlled flow of silica sand is introduced between the wheel and the test surface, producing a three-body abrasion condition that simulates sliding wear in service.

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