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  2. Rockwell scale - Wikipedia

    en.wikipedia.org/wiki/Rockwell_scale

    The Rockwell scale is a hardness scale based on indentation hardness of a material. The Rockwell test measures the depth of penetration of an indenter under a large load (major load) compared to the penetration made by a preload (minor load). [1] There are different scales, denoted by a single letter, that use different loads or indenters.

  3. 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.

  4. Indentation hardness - Wikipedia

    en.wikipedia.org/wiki/Indentation_hardness

    Indentation hardness tests are used in mechanical engineering to determine the hardness of a material to deformation. Several such tests exist, wherein the examined material is indented until an impression is formed; these tests can be performed on a macroscopic or microscopic scale. When testing metals, indentation hardness correlates roughly ...

  5. Barcol hardness test - Wikipedia

    en.wikipedia.org/wiki/Barcol_hardness_test

    Barcol hardness is measured on a scale from 0 to 100 with the typical range being between 50B and 90B. A measurement of 60B is roughly equivalent to a Shore hardness of 80D or a Rockwell hardness M100. [4] [6] As defined in ASTM D 2583 the scale divisions from 0-100 should each indicate a depth of 0.0076 mm or the equivalent 0.0003 inches. [7]

  6. Engineering drawing abbreviations and symbols - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing...

    hardness, Rockwell, A scale: See Rockwell scale. HRB: hardness, Rockwell, B scale: See Rockwell scale. HRC: hardness, Rockwell, C scale: See Rockwell scale. HRS: hot rolled steel: HT TR: heat treat, heat treatment: H&T or H/T or HT: hardened and tempered: A form of heat treatment in which the metal is first hardened and then tempered. Compare N&T.

  7. Leeb rebound hardness test - Wikipedia

    en.wikipedia.org/wiki/Leeb_rebound_hardness_test

    The Leeb Rebound Hardness Test (LRHT) invented by Swiss company Proceq SA is one of the four most used methods for testing metal hardness. This portable method is mainly used for testing sufficiently large workpieces (mainly above 1 kg). [citation needed] It measures the coefficient of restitution. It is a form of nondestructive testing.

  8. Brinell scale - Wikipedia

    en.wikipedia.org/wiki/Brinell_scale

    Brinell scale. The Brinell scale / brəˈnɛl / characterizes the indentation hardness of materials through the scale of penetration of an indenter, loaded on a material test-piece. It is one of several definitions of hardness in materials science.

  9. List of blade materials - Wikipedia

    en.wikipedia.org/wiki/List_of_blade_materials

    The most common blade materials are carbon steel, stainless steel, tool steel, and alloy steel. 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 ...