411 REFERENCE · Wiktionary
Rockwell scale
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Rockwell hardness test
Noun
en materials science A hardness scale based on the indentation hardness of a material.
Coordinate terms
en HRA HRB HRC HRD HRE HRF HRG
Related terms
en Rockwell hardness
en eponyms