DIFF Subgroup
G01N 3/40 Investigating hardness or rebound hardness
Introduced: September 1968
Full Title
Investigating strength properties of solid materials by application of mechanical stress > Investigating hardness or rebound hardness
Of 6 combined children, 5 exist in both systems.
1 codes are CPC-only extensions.
4 shared codes have differing titles between IPC and CPC.
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) IPC+CPC Available in IPC and CPC
- G01N 3/48 by performing impressions under impulsive load by indentors, e.g. falling ball (G01N3/54 takes precedence) IPC+CPC Available in IPC and CPC
- G01N 3/50 by measuring rolling friction, e.g. by rocking pendulum (G01N3/54 takes precedence) IPC+CPC Available in IPC and CPC
- G01N 3/52 by measuring extent of rebound of a striking body (G01N3/54 takes precedence) IPC+CPC Available in IPC and CPC