ISO 148-1

Charpy Impact Testing

Charpy impact testing measures the energy absorbed by a standardised notched specimen when struck by a swinging pendulum. It characterises a material’s toughness and brittle-to-ductile transition temperature. ISO 148-1 is mandatory for structural steels, pressure vessels, and pipelines operating at low temperatures or in impact-prone environments.

What it measures

  • Absorbed impact energy (KV2, KU2) in joules
  • Lateral expansion
  • Fracture appearance (percentage shear area)
  • Ductile-to-brittle transition temperature (DBTT)
🇧🇪 NBN EN ISO 148-1 🇩🇪 DIN EN ISO 148-1 🇬🇧 BS EN ISO 148-1 🇫🇷 NF EN ISO 148-1 🇮🇹 UNI EN ISO 148-1 🇪🇸 UNE EN ISO 148-1 🇳🇱 NEN EN ISO 148-1 🇧🇪 NBN EN ISO 148-2 🇩🇪 DIN EN ISO 148-2 🇬🇧 BS EN ISO 148-2 🇫🇷 NF EN ISO 148-2 🇮🇹 UNI EN ISO 148-2
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Industries

Oil & Gas Offshore Pressure Vessels Structural Steel Pipelines

Related Standards

  • ISO 148-1 Charpy pendulum impact test -- Test method
  • ISO 148-2 Verification of testing machines
  • ASTM E23 Standard Test Methods for Notched Bar Impact Testing

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