Vickers and Knoop Hardness Testers are used for measuring the hardness of metals, both ferrous and non-ferrous. The purpose of this metal hardness testing is to identify the material's resistance to deformation and permanent depth change. It is the most unique method of hardness testing due to its independent testing nature. The Vickers test allows for a uniform hardness testing value along the complete range of testing loads; regardless of which force is applied on any given material. Vickers Hardness Value, symbolized as HV, or the Diamond Pyramid Hardness Value, symbolized as DPH are the units of hardness in Vickers and Knoop Hardness Testing. The Vickers Hardness Scale has a very extensive load range to cover all possible testing applications.
