A fracture assessment requires knowledge of the fracture toughness of the steel and/or weld metal, which may be estimated from the Charpy energy or CVN test results. (10, 14) Unlike fatigue, the susceptibility to fracture is strongly dependent on the type of material and even the particular heat of steel or lot of weld metal. (See references 10, 11, 15, and 16.) CVN results may be obtained from the mill reports for the steel and from the certifications for the weld metal, if records were retained.