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  2. Hardness comparison - Wikipedia

    en.wikipedia.org/wiki/Hardness_comparison

    Rockwell C HRC (120 degree cone 150 kg) ... "Standard Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness ...

  3. Rockwell scale - Wikipedia

    en.wikipedia.org/wiki/Rockwell_scale

    The Brinell hardness test ... is made with a conical diamond of 120° ± 0.35° included angle and a tip radius of 0.200 ± 0 ... HRC 55–66 (Hardened High Speed ...

  4. Brinell scale - Wikipedia

    en.wikipedia.org/wiki/Brinell_scale

    The Brinell hardness is designated by the most commonly used test standards (ASTM E10-14 [2] and ISO 6506–1:2005) as HBW (H from hardness, B from brinell and W from the material of the indenter, tungsten (wolfram) carbide). In former standards HB or HBS were used to refer to measurements made with steel indenters.

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

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

    number symbol name Mohs hardness [1] Vickers hardness (MPa) [1] Brinell hardness (MPa) [1] Brinell hardness (MPa) [note 1] [2] 3: Li: lithium: 0.6: 5: 4: Be: beryllium: 5.5: 1670: 590–1320: 5: B: boron

  6. Indentation hardness - Wikipedia

    en.wikipedia.org/wiki/Indentation_hardness

    Brinell hardness test (HB) BHN and HBW are widely used [7] Knoop hardness test (HK), for measurement over small areas, widely used to test glass or ceramic material. [8] Janka hardness test, for wood; Meyer hardness test; Rockwell hardness test (HR), principally used in the USA. HRA, HRB and HRC scales are most widely used. [9]

  7. Abrasion resistant steel - Wikipedia

    en.wikipedia.org/wiki/Abrasion_resistant_steel

    Average Brinell Hardness Numbers (BHNs) for Abrasion Resistant Steel Grades [4] Grade BHN AR200 & AR235: 180-260 AR400: 360-440 AR450: 430-480 AR500: 460-544 AR600 ...

  8. Dying To Be Free - The Huffington Post

    projects.huffingtonpost.com/dying-to-be-free...

    There's A Treatment For Heroin Addiction That Actually Works. Why Aren't We Using It?

  9. 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 ...