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Toggle the table of contents. Hardnesses of the elements (data page) ... Mohs scale of mineral hardness; Mohs hardness of materials (data page)
Bearing metals and other very soft or thin materials: 130: 500 R: HRR: 60: 1 ⁄ 2 in (12.70 mm) ball: Thermoplastics, bearing metals, and other very soft or thin materials: 130: 500 S: HRS: 100: 1 ⁄ 2 in (12.70 mm) ball: Bearing metals and other very soft or thin materials: 130: 500 V: HRV: 150: 1 ⁄ 2 in (12.70 mm) ball: Bearing metals and ...
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.
Toughness tends to be small for brittle materials, because elastic and plastic deformations allow materials to absorb large amounts of energy. Hardness increases with decreasing particle size. This is known as the Hall-Petch relationship. However, below a critical grain-size, hardness decreases with decreasing grain size.
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 ...
Hardness measurements quantify the resistance of a material to plastic deformation. Indentation hardness tests compose the majority of processes used to determine material hardness, and can be divided into three classes: macro, micro and nanoindentation tests. [2] [3] Microindentation tests typically have forces less than 2 N (0.45 lb f ...