Hardness tests determine the various properties of a specific metal, such as resistance to wear, toughness, and formability.
Different test scales were created to assist engineers in selecting the appropriate metals and hardness for their specific application.

We utilize these tests to ensure the finished products meet required specifications to ensure a proper match between the hardness of the sprocket and the hardness of the chain. The folowing are the two common tests performed in our industry.

Brinell Hardness Test

The first widely used standardized hardness test, the Brinell method determines the indentation hardness of metal materials and is typically used for materials with a coarse surface or a surface too rough to be tested through other methods.

The Brinell test is not useful for fully hardened steel or other hard materials, however, and often leaves a large impression on the metal. The Brinell test is also very slow.

Rockwell Hardness Test

Developed to provide a less destructive alternative to the Brinell test, this differential-depth method eliminates the errors associated with mechanical imperfections.

Quicker and cheaper than the Brinell tests, the Rockwell test requires no material prep, and hardness value is easily readable without any extra equipment, making this one of the most commonly used methods of measuring metal hardness.

Metal Hardness Chart

Rockwell-Birnell Chart