materjali võime enne purunemist absorbeerida löögienergiat ja plastselt deformeeruda (vt löögienergia; vrd löögitugevus)
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Viiakse tavaliselt läbi sälgatud katsekehal/teimikul, rakendades Charpy või Izod löökpaindeteimi. Iseloomustab nii materjali tugevust kui ka plastsust. (vt Charpy löökpaindekatse, Izod löökpaindekatse)
ability of a material to absorb impact energy and deform plastically before fracturing (see: impact energy; compare: impact strength)
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Since a notched specimen is usually considered for impact testing, the impact toughness is commonly called notch toughness. This property includes both strength and ductility. Usually measured by means of a Charpy or Izod test. (see: Charpy impact test, Izod impact test)
