scratch hardness scale

scratch hardness scale
шкала твердости по Мосу

English-Russian dictionary of chemistre. 2014.

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  • scratch hardness — resistance of a material, as a stone or metal, to scratching by one of several other materials, the known hardnesses of which are assembled into a standard scale, as the Mohs scale of minerals. [1925 30] * * * …   Universalium

  • scratch hardness — resistance of a material, as a stone or metal, to scratching by one of several other materials, the known hardnesses of which are assembled into a standard scale, as the Mohs scale of minerals. [1925 30] …   Useful english dictionary

  • Mohs hardness scale —    a 1 10 scale for estimating the hardness of a mineral, introduced by the German geologist Friedrich Mohs (1773 1839) in 1812. To apply the scale, one attempts to scratch the mineral with standard minerals assigned hardness numbers as follows:… …   Dictionary of units of measurement

  • Hardness — This article is about mechanical properties of materials. For other uses, see Hard. Hardness is the measure of how resistant solid matter is to various kinds of permanent shape change when a force is applied. Macroscopic hardness is generally… …   Wikipedia

  • hardness — /hahrd nis/, n. 1. the state or quality of being hard: the hardness of ice. 2. a relative degree or extent of this quality: wood of a desirable hardness. 3. that quality in water that is imparted by the presence of dissolved salts, esp. calcium… …   Universalium

  • hardness —    a measure of the hardness of a metal or mineral. Hardness is a property easy to appreciate but difficult to quantify and measure.    The Mohs hardness scale is used in geology to give a rough estimate of hardness by testing which minerals are… …   Dictionary of units of measurement

  • pencil hardness —    a traditional measure of the hardness of the leads (actually made of graphite) in pencils. The hardness scale, from softer to harder, takes the form ..., 3B, 2B, B, HB, F, H, 2H, 3H, 4H, .... The letters stand for Black, Hard, and Firm. (There …   Dictionary of units of measurement

  • Hardness — Hard ness, n. [AS. heardness.] 1. The quality or state of being hard, literally or figuratively. [1913 Webster] The habit of authority also had given his manners some peremptory hardness. Sir W. Scott. [1913 Webster] 2. (Min.) The cohesion of the …   The Collaborative International Dictionary of English

  • scale — 1. A standardized test for measuring psychological, personality, or behavioral characteristics. SEE ALSO: score, test. 2. SYN: squama. 3. A small thin plate of horny epithelium, resembling a fish s., cast off from the skin …   Medical dictionary

  • hardness — noun Date: before 12th century 1. the quality or state of being hard 2. a. the cohesion of the particles on the surface of a mineral as determined by its capacity to scratch another or be itself scratched compare Mohs scale b. resistance of metal …   New Collegiate Dictionary

  • hardness — /ˈhadnəs/ (say hahdnuhs) noun 1. the state or quality of being hard. 2. an instance of this quality. 3. that quality in impure water which is imparted by the presence of dissolved salts, especially calcium sulphate. 4. Mineralogy the comparative… …  


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