hardness test
41Knoop hardness number — See under number. * * * a number indicative of the degree of relative hardness of a material, calculated from the load employed and the length of the long axis of the impression made by the rhomboidal pyramid of a diamond pressed into the surface …
42Bri|nell hardness — «brih NEHL», the relative hardness of a metal, determined by pressing a steel ball under a given pressure into the substance under test. ╂[< J. A. Brinell, 1849 1925, Swedish engineer, who devised the test for it] …
43Vickers hardness number — (HV or VHN) or Vickers pyramid number (VPN) a measure of the hardness of a metal introduced by Vickers in 1922. In the Vickers test (suitable for surface hardened metals), a pyramidal diamond is pressed into the material being tested. The… …
44Brinell hardness number — Metall. a rating obtained from a test (Brinell test) to determine the hardness of a metal by pressing a steel ball of a standard size into the metal using a standard force. Also called Brinell number. Abbr.: Bhn [named after J.A. Brinell (1849… …
45Brinell hardness number — Bri•nell′ hard′ness num ber [[t]brɪˈnɛl[/t]] n. mel a rating obtained from a test(Brinell′ test )to determine the hardness of a metal by pressing a steel ball of a standard size into the metal using a standard force. Abbr.: Bhn • Etymology: after …
46Brinell hardness number — Metall. a rating obtained from a test (Brinell test) to determine the hardness of a metal by pressing a steel ball of a standard size into the metal using a standard force. Also called Brinell number. Abbr.: Bhn [named after J.A. Brinell (1849… …
47Jominy test — a method for determining the hardenability of steel. The Jominy test is covered by BS 4437:1987. A standard test piece 25 mm x 100 mm is heated to a pre determined temperature and quenched by a jet of water sprayed onto one end. When the specimen …
48fire test — noun : a test by fire (as one to determine the burning point of an oil or one to determine the resistance of porcelain or concrete to heat) see time temperature curve * * * fire test, 1. a test to determine the temperature at which kerosene or… …
49international rubber hardness degree — (IRHD) a unit used to measure the hardness of rubber and similar materials (technically known as elastomers). Measurements are made using an IRHD durometer, and the results are usually similar, but not identical, to readings made with the… …
50Brinell hardness — A test of a metal s hardness by hydraulically pressing a hard ball into the metal …
