IPC Subgroup
G01N 3/4 Investigating hardness or rebound hardness
Introduced: September 1968
Last revised: January 2006
Full Title
Investigating strength properties of solid materials by application of mechanical stress > Investigating hardness or rebound hardness
Classification Context
- Section:
- PHYSICS
- Class:
- MEASURING; TESTING
- Subclass:
- INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
Related Keywords
CHARPY hardness testinvestigating HARDNESSSCLEROSCOPES
5 direct subcodes
Child Classifications
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- G01N 3/42 by performing impressions under a steady load by indentors, e.g. sphere, pyramid
- G01N 3/48 by performing impressions under impulsive load by indentors, e.g. falling ball
- G01N 3/5 by measuring rolling friction, e.g. by rocking pendulum
- G01N 3/52 by measuring extent of rebound of a striking body
- G01N 3/54 Performing tests at high or low temperatures