RCK has various meanings in the Music category. Discover the full forms, definitions, and usage contexts of RCK in Music.
A measure of the surface hardness of a material. A value derived from the increase in depth of an impression as the load of a steel indenter is increased from a fixed minimum value to a higher value and then returned to the minimum value. The values are quoted with a letter prefix corresponding to a scale relating to a given combination of load and indenter. Rockwell hardness is the resistance of a material to indentation of a defined steel ball.
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