Nil Ductility Transition Temperature of steel is most important to be known before application especially at low temperature. Steels that are ductile in room temperature become to be brittle at low temperature. Transition temperature of high strength steel for wall ship application has been studied with using drop weight test method. This Method had been used extensively to investigate conditions required for initiation of brittle fracture in structural steel. Range temperature of examination was -40drajatC to -65drajatC with using alcohol media that was colded by dry ice. Result examinatian shown that the nil-ductility transition temperature of the high strength steel is -63drajatC. Keywords: nil-ductility transition temperature, ductile, brittle, high strength steel. Kurman M.-BPPT
