The paper examines the performance characteristics of a material by analyzing hardness test data more especially the effect of different test parameters including, maximum load and penetration depth. Severity, which is another significant property defining materials’ ability to resist deformation, was quantified as GPa (GigaPascals) and HV (Vickers hardness). All the tests were performed with different samples, and the maximum applied loads ranged from 24. 49mN to 24. 81mN, and the depth of penetration from 0. 50µm to 0. 86µm. These conditions influenced the hardness readings from 82. 37 GPa to 195. 87 GPa depending on the carbon nanotube attributes – in particular, diameter.