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2. Mohs scale - Wikipedia

   en.wikipedia.org/wiki/Mohs_scale

   The Mohs scale (/ moʊz / MOHZ) of mineral hardness is a qualitative ordinal scale, from 1 to 10, characterizing scratch resistance of minerals through the ability of harder material to scratch softer material. The scale was introduced in 1812 by the German geologist and mineralogist Friedrich Mohs, in his book Versuch einer Elementar-Methode ...

3. Hardnesses of the elements (data page) - Wikipedia

   en.wikipedia.org/wiki/Hardnesses_of_the_elements...

   Print/export Download as PDF; Printable version; In other projects ... Mohs scale of mineral hardness; Mohs hardness of materials (data page) Vickers hardness test;

4. Scratch hardness - Wikipedia

   en.wikipedia.org/wiki/Scratch_hardness

   The first scientific attempt to quantify materials by scratch tests was by mineralogist Friedrich Mohs in 1812 (see Mohs scale). [3] [4] The Mohs scale is based on relative scratch hardness of different materials; with talc assigned a value of 1 and diamond assigned a value of 10. [5] Mohs's scale had two limitations: it was not linear, and ...

5. Janka hardness test - Wikipedia

   en.wikipedia.org/wiki/Janka_hardness_test

   The Janka hardness test results tabulated below followed ASTM D 1037-12 testing methods. Lumber stocks tested range from 1" to 2" (25-50 mm) thick. The tabulated Janka hardness numbers are an average. There is a standard deviation associated with each species, but these values are not given. [citation needed] No testing was done on actual flooring.

6. Friedrich Mohs - Wikipedia

   en.wikipedia.org/wiki/Friedrich_Mohs

   Carl Friedrich Christian Mohs (/ m oʊ z / MOHZ, German: [ˈfʁiːdʁɪç ˈmoːs]; 29 January 1773 – 29 September 1839) was a German chemist and mineralogist. He was the creator of the Mohs scale of mineral hardness. [1] Mohs also introduced a classification of the crystal forms in crystal systems independently of Christian Samuel Weiss. [2]

7. File:Mohs-Hardness-Graph.svg - Wikipedia

   en.wikipedia.org/wiki/File:Mohs-Hardness-Graph.svg

   File:Mohs-Hardness-Graph.svg. File. File history. File usage. Metadata. Size of this PNG preview of this SVG file: 360 × 480 pixels. Other resolutions: 180 × 240 pixels | 576 × 768 pixels | 768 × 1,024 pixels | 1,536 × 2,048 pixels. Original file ‎ (SVG file, nominally 360 × 480 pixels, file size: 26 KB) This is a file from the ...

8. Hardness comparison - Wikipedia

   en.wikipedia.org/wiki/Hardness_comparison

   Hardness comparison. 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.

9. Hardness - Wikipedia

   en.wikipedia.org/wiki/Hardness

   When testing coatings, scratch hardness refers to the force necessary to cut through the film to the substrate. The most common test is Mohs scale, which is used in mineralogy. One tool to make this measurement is the sclerometer. Another tool used to make these tests is the pocket hardness tester. This tool consists of a scale arm with ...