Gogan Hardness of Brake Lining J379_200408

Hardness measurements are used as a quality control check of the consistency of formulation and processing of brake linings. Gogan hardness is nondestructive (the penetrator causes shallow surface deformation.). Gogan hardness method alone does not show anything about a lining’s ability to develop friction or to resist fade when used as a friction element in brakes.

The hardness and the range of hardness are peculiar to each formulation, thickness, and contour; therefore, the acceptable values and ranges must be established for each formulation and part configuration by the manufacturer.

J379_201702

2017-02-02

Latest

Stabilized

J379_200908

2009-08-26

Historical

Reaffirmed

J379_200408

2004-08-16

Historical

Revised