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ROCKWELL HARDNESS SCALE BASED ON INDENTATION HARDNESS OF A MATERIAL WITH A 120° DIAMOND SPHEROCONICAL UNDER 150 KGF
Rockwell hardness test; Rockwell Hardness Scale; Rockwell hardness scale; Rockwell+scale; Rockwell hardness; Rockwell Constant Hardness Rating; Rockwell test
D. Henry Rockwell
MEMBERS OF THE WISCONSIN STATE ASSEMBLY
David Henry Rockwell (July 27, 1823 - 1899) was a miller from Oconomowoc, Wisconsin (originally from New York) who served a single one-year term as a member of the Wisconsin State Assembly in 1849 (the 2nd Wisconsin Legislature).State of Wisconsin Legislative Reference Bureau "Members of the Wisconsin Legislature 1848–1999".
Rockwell D. Hunt
AMERICAN HISTORIAN
Rockwell Dennis Hunt
Rockwell Dennis Hunt (1868–1966) was an eminent California historian, a professor at the University of Southern California and the University of the Pacific, and prolific author. He was named Mr.
Dick Rockwell
![Secret Six]]; cover art by Rockwell.<!--confirmed: both penciled and inked-->](https://commons.wikimedia.org/wiki/Special:FilePath/Action629.jpg?width=200 "Secret Six]]; cover art by Rockwell.<!--confirmed: both penciled and inked-->")
ARTIST (1920-2006)
Dick rockwell; Richard Rockwell
Richard Waring Rockwell (December 11, 1920 – April 18, 2006)Dick Rockwell at the Lambiek Comiclopedia was an American comic strip and comic book artist best known as Milt Caniff's uncredited art assistant for 35 years on the adventure strip Steve Canyon. Rockwell was a nephew of the famed painter and illustrator Norman Rockwell.
ويكيبيديا
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). There are different scales, denoted by a single letter, that use different loads or indenters. The result is a dimensionless number noted as HRA, HRB, HRC, etc., where the last letter is the respective Rockwell scale. Higher numbers correspond to harder materials.
When testing metals, indentation hardness correlates linearly with tensile strength.
