Robo Charpy Impact Testing System
Vector Robo Charpy system for metal notch toughness per ISO 148-1 and ASTM E23 — manual, semi-automatic or robotic lines from 300 J to 750 J with sub-zero option.
- iso-148-1
- astm-e23
- +1 more
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Kinetic energy lost by the pendulum striker when a notched specimen fractures, reported in joules after friction corrections per Charpy or Izod methods.
Impact testing
Absorbed Impact Energy
Kinetic energy lost by the pendulum striker when a notched specimen fractures, reported in joules after friction corrections per Charpy or Izod methods.
Formula
KV = E0 − E1
E0 is initial pendulum energy and E1 is residual energy after fracture; ISO 148-1 / ASTM E23 define friction and geometry corrections.
What it measures
Absorbed energy is the energy dissipated in notch fracture during a pendulum impact test. It is a screening toughness metric for metals and some plastics, not a direct fracture mechanics parameter.
How it is tested
A calibrated pendulum releases from a fixed height, strikes the specimen, and records rise after fracture. Machine software or tables convert angle/height to energy with periodic verification using certified reference specimens.
Standards and reporting
Report method (Charpy V, Izod), specimen size, and temperature. Sub-size specimens require notation per standard (e.g., KV2 for 10×10 mm Charpy).
Common errors
Worn strikers, loose anvils, incorrect notch orientation, and neglecting friction calibration bias energy low or high.
Related standards
Compatible equipment
Related calculator
Compute pendulum absorbed energy, machine capacity, and impact strength (kJ/m² or Izod J/m) from Charpy or Izod test inputs per ISO 148-1, ASTM E23, ISO 179-1, and ASTM D256.
Open calculator →Related terms
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Charpy Impact Test
A notched bar is broken by a swinging pendulum striker; absorbed energy KV or KU (joules) characterizes toughness and ductile-to-brittle transition versus temperature.
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Izod Impact Test
A notched cantilever specimen is struck on its notched face by a pendulum; absorbed energy reflects toughness with a different stress distribution than Charpy.
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Ductile-to-Brittle Transition
Temperature range where ferritic steels shift from high absorbed impact energy (ductile) to low energy (brittle) fracture; mapped with Charpy or Izod energy versus test temperature.