Our portable hardness testers are made in three distinct models for testing brass, aluminum, copper , and mild steel. They allow you to quickly identify tempers and test a variety of shapes that other models simply cannot check-including tubing, extrusions, and flat stock.

The Model B tester is designed to cover the hardness of aluminum alloys from the 100 to the 7075 series.
The 20 graduations on the dial indicator cover the range between 25 and 110 on the Rockwell E Scale.


Developed to obtain a more sensitive response to slight changes in the upper range of hardness covered by the Model B, the Model B-75 Tester is particularly useful in testing the hardness of stronger aluminum alloys as well as of mild steep. The B-75 covers the range from annealed to full-hard for brass. It is accomplished by incorporationg a penetrator of slightly different contours and a heavier load spring than used in the Model B, and the 20 graduations on the dial indicator cover the range between 20 and 100 on the Rockwell B Scale.

Certain industries needed a method of rapidly testing the hardness of electrodeposited copper in the low hardness range. The Model BB-75 Tester was the solution. The penetrator is used to give sensitivity while the Model B load spring is employed to give light pressure. This combination allow users to test the soft range of many common materials. The graph below shows the range covered by this tester on copper.