Charpy impact test

A notched specimen is broken by a swinging pendulum and the absorbed energy (J) is recorded. It measures toughness, especially at low temperature — grades with a J2/K2 suffix guarantee 27 J at −20/−50 °C respectively.

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Annealing · Austenite · Bainite · Carbon equivalent (CEV) · Carburizing · Case hardening · Cold drawn · Decarburization · Elongation (A) · ESR (electroslag remelting) · Ferrite · Grain size