ASTM E384 is the approved test method for determining a material’s Knoop and Vickers hardness.

Test loads can range from 1 gramme to 1,000 grammes, despite the fact that they are typically between 100 and 500 grammes.

The Vickers indenter frequently produces an indentation that is geometrically equivalent at all test forces.

The Knoop indenter does not produce a geometrically similar indentation as a function of test force. Because of its rhombic shape, a Knoop indentation has a shallower indentation depth than a Vickers impression under the same test conditions. Therefore, it can be very useful to evaluate thin coatings or hardness gradients on sectioned samples using the Knoop indenter.

ASTM E140 can be used to convert Knoop and Vickers hardness values into other hardness scales.

To answer your question, yes, NextGen’s Macro Vickers Hardness Tester – Analogue, Digital and Digital with CCD Optical Analysis Software implements ASTM E384 Standard

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