ROCKWELL HARDNESS


Meaning of ROCKWELL HARDNESS in English

ˈräˌkwel-, -_kwəl- noun

Usage: usually capitalized R

Etymology: after Stanley P. Rockwell, 20th century American metallurgist

: the hardness of a metal or alloy measured by an apparatus in which a diamond-pointed cone is pressed into the metal to a standard depth to determine the relative resistance to penetration as indicated automatically by a number on a dial

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.