KUČERA Pavel VŠB - Technická univerzita

The 34CrMo steel is widely used material type for various applications, including high strength ones such as piping, offshore applications or materials for storage of natural gas. High level of mechanical properties is most commonly achieved by variety of heat treatment. In this paper resistance of the 34CrMo steel to sulphide stress cracking (SSC) is investigated as it is required by the certification authorities in case of materials for high pressure steel cylinders used for CNG (compressed natural gas). The specimens were prepared by special methods to obtain three sets with different final surfaces roughness. Differences in the SSC are discussed.