pärast keevitamist enamasti terase termomõju tsoonis karastumise ja vesiniku difusiooni toimel tekkinud praod (vrd kuumpragu, korduvkuumutuspraod)
Hea teada
Tänapäevane termin külmpragude kohta on vesinikpraod.
a type of weld cracking that usually occurs below 205 oC which may occur during or after cooling to room temperature, sometimes with considerable time delay (compare: hot crack, reheat cracking)
Hea teada
Three factors combine to produce cold cracks: stress, hydrogen and susceptible microstructure.
