Specification:
Device Name: Rockwell Hardness
Device model:
Manufacturer:
Country of manufacture:
Description of test:
Hardness is defined as the resistance of a material to permanent deformation. This device measures the hardness of plastic samples as resistance to depression under load. The Rockwell method measures the depth of stable penetration created by a force / load applied to the penetrator. Hardness is a dimensionless number, and a higher number on any scale means harder material
Sample preparation
- The sample required for this test must be at least 6 mm thick cut from the molded or cut from the plate and have a minimum surface area of 25 mm square, or if cut from other shapes have a minimum surface area of 6 cm cm .
- Make sure that the sample has smooth parallel surfaces to be well placed on the anvil and to avoid slight contact deviation.
Applicable standards
- ASTM D785 For plastics
- ASTM E18 For metals