Standard Test Method for Rockwell Hardness of Graphite Materials

Importancia y uso:

4.1 A Rockwell L scale hardness number is a number derived from the net increase in depth of impression as the load on a 6.3500 mm ± 0.0025 mm diameter steel-ball indenter is increased from a fixed 10 kg minor load to a 60 kg major load and then returned to the minor load.

4.2 A Rockwell hardness number is directly related to the indentation hardness of a material; the higher the Rockwell L scale reading, the harder the material. The test is useful in the evaluation and the manufacturing control of carbon and graphite materials.

Subcomité:

D02.F0

Referida por:

D7775-21

Volúmen:

05.05

Número ICS:

71.060.10 (Chemical elements)

Palabras clave:

carbon; graphite; hardness; indenter; Rockwell L;