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

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

    Mohs hardness [1] Vickers hardness ... cobalt: 5.0: 1043: 470–3000: 1291 28: Ni: nickel: 4.0: 638: ... Vickers hardness test; Brinell scale This page was last ...

  3. Cobalt - Wikipedia

    en.wikipedia.org/wiki/Cobalt

    Pauling scale: 1.88 : Ionization energies: 1st: 760.4 kJ/mol ... Cobalt is a chemical element; ... hardness, and resistance to ...

  4. List of blade materials - Wikipedia

    en.wikipedia.org/wiki/List_of_blade_materials

    Less common materials in blades include cobalt and titanium alloys, ceramic, obsidian, and plastic. The hardness of steel is usually stated as a number on the Rockwell C scale (HRC). The Rockwell scale is a hardness scale based on the resistance to indentation a material has.

  5. Mohs scale - Wikipedia

    en.wikipedia.org/wiki/Mohs_scale

    Mohs hardness kit, containing one specimen of each mineral on the ten-point hardness scale. The Mohs scale (/ m oʊ z / 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.

  6. Template:Infobox cobalt - Wikipedia

    en.wikipedia.org/wiki/Template:Infobox_cobalt

    Cobalt, 27 Co; Cobalt ... Pauling scale: 1.88 : Ionization energies: 1st: 760.4 kJ/mol ... Poisson ratio comment = | Mohs hardness = | Mohs hardness ref = | Mohs ...

  7. Heterogenite - Wikipedia

    en.wikipedia.org/wiki/Heterogenite

    Mohs scale hardness: 4–5: Density: 4.13 – 4.47, Average = 4.3 ... Heterogenite is formed by the oxidation of cobalt-sulfides and accumulated as residual deposits ...

  8. Hardness scales - Wikipedia

    en.wikipedia.org/wiki/Hardness_scales

    Hardness scales may also refer to: Methods of measuring the deposit formation by hard water. The scale of Pencil hardness This page was last edited on 11 ...

  9. Hardness comparison - Wikipedia

    en.wikipedia.org/wiki/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 .