CPC Subgroup
G01N 3/40 Investigating hardness or rebound hardness
Full Title
Investigating strength properties of solid materials by application of mechanical stress > Investigating hardness or rebound hardness
6 direct subcodes
Child Classifications
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- G01N 3/42 by performing impressions under a steady load by indentors, e.g. sphere, pyramid (G01N3/54 takes precedence)
- G01N 3/48 by performing impressions under impulsive load by indentors, e.g. falling ball (G01N3/54 takes precedence)
- G01N 3/50 by measuring rolling friction, e.g. by rocking pendulum (G01N3/54 takes precedence)
- G01N 3/52 by measuring extent of rebound of a striking body (G01N3/54 takes precedence)
- G01N 3/54 Performing tests at high or low temperatures