The 'Charpy V-notch impact test' for steel measures:
Choose the correct answer
Tensile yield strength
Notch toughness (energy absorbed) — resistance to brittle fracture at specified temperature
Hardness (Brinell number)
Fatigue life directly
Correct Answer
B. Notch toughness (energy absorbed) — resistance to brittle fracture at specified temperature
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Charpy test (IS 1757): measures notch toughness (energy absorbed by standard notched specimen struck by pendulum hammer at specified temperature). Value in Joules (J). Higher J = more ductile, better resistance to brittle fracture. IS 2062 specifies minimum Charpy energy for different subgrades: E250A/B/C with different impact requirements. Critical for bridges and structures in cold climates.
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