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Pages for logged out editors learn ... move to sidebar hide (Top) 1 Notes. 2 References. 3 See also. Toggle the table of contents. Hardnesses of the elements (data ...
A variety of hardness-testing methods are available, including the Vickers, Brinell, Rockwell, Meyer and Leeb tests. Although it is impossible in many cases to give an exact conversion, it is possible to give an approximate material-specific comparison table for steels.
Each of the ten hardness values in the Mohs scale is represented by a reference mineral, most of which are widespread in rocks. The Mohs scale is an ordinal scale . For example, corundum (9) is twice as hard as topaz (8), but diamond (10) is four times as hard as corundum.
I know the problem, but can't find a consistent replacement set. Hardness depends on pretreatment (see ref. 2) and form (say, iron). Thus I came out with set 4 and changed some infobox values accordingly (tin - now, some others before, but not all, as there is some rough agreement between sets 3 and 4).
The unit of hardness given by the test is known as the Vickers Pyramid Number (HV) or Diamond Pyramid Hardness (DPH). The hardness number can be converted into units of pascals, but should not be confused with pressure, which uses the same units. The hardness number is determined by the load over the surface area of the indentation and not the ...
Meyer's law is often used to relate hardness values based on the fact that if the weight is quartered, the diameter of the indenter is halved. For instance, the hardness values are the same for a test load of 3000 kgf with a 10 mm indenter and for a test load of 750 kgf with a 5 mm diameter indenter.
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Pages for logged out editors learn more. ... (Top) 1 Methods of measuring mineral hardness. 2 Other hardness scales. Toggle the table of contents. Hardness scales ...