Hardness is the property of a material that enables it to resist plastic deformation, usually by penetration. However, the term hardness may also refer to resistance to bending, scratching, abrasion or cutting.
Hardness is not an intrinsic material property dictated by precise definitions in terms of fundamental units of mass, length and time. A hardness property value is the result of a defined measurement procedure.
Common hardness testing types include :
- Rockwell testing is the most commonly used method by virtue of the quick results generated and is typically used on metals and alloys; advantages: No optical system required, not depent on operator’s skill, less affected by the surface roughness.
Rockwell hardness tester DAKOMASTER 300
- Vickers testing are more suitable for thin materials, coatings, and mounted metallographic components.
Vicker hardness tester WIKI 200 JS4
- Brinell testing applications generally include large, inaccurate devices such as cast irons, large steel frames and aluminum; not for testing hard materials, thin plates or curved surfaces.
Brinell hardness tester Integral 1
- Rockwell testing: HRA, HRB, HRC, HRD...
- Vickers tessting: HV
- Brinell testing: HB
Source: TECOTEC HCM