Sulphide Stress Cracking of API Carbon Steels

• Autorzy: Sojka, J. , Jonšta, P. , Váňová, P. , Sozańska, M.
• Konferencja: International Conference on Modelling in Mechatronics (9 ; 02-04.09.2004 ; Kazimierz Dolny, Poland)
• Języki publikacji: EN

Abstrakty

EN

In this paper results of SSC resistance of the same carbon steels are summarized. Several grades of steels have been tested, conforming to API grades X52 and X70 (API 5L Specification). Steels were tested in an as-received state or after laboratory heat treatments including quenching and termpering. Results showed that the resistance of steels to SSC depends strongly on their microstructure. Heats containing bands of non-tempered martensite or bainite exhibited rather poor resistance to SSC and failed and stresses well below the yield strength when tested according to the NACE TM 0177, Method A. It must be pointed out that hardness of all studied steels was well bellow the limit of 22 HRC. Tempering or quenching had a beneficial effect on resistance of steels to SSC despite the fact that mechanical properties (and hardness) increased. All the results indicate that microstructure plays important role also in the case of SSC. If this fact is not respected, a material non resistant to SSC can be chosen.

Słowa kluczowe

EN

sulphide stress cracking; microstructure; fish eyes

• Czasopismo: Machine Dynamics Problems
• Rocznik: 2004
• Tom: Vol. 28, No. 4
• Strony: 121-126
• Opis fizyczny: Bibliogr. 5 poz.

Twórcy

autor

Sojka, J.

• VSB - Technical University of Ostrava, Department of Materials Engineering,

autor

Jonšta, P.

• VSB - Technical University of Ostrava, Department of Materials Engineering

autor

Váňová, P.

• VSB - Technical University of Ostrava, Department of Materials Engineering

autor

Sozańska, M.

• Department of Materials Science, Silesian University of Technology, Katowice

Bibliografia

• Asahi, H., Sogo, Y., Ueno, M., Higashiyama, H., 1988, Metal. Trans., 19A, p. 2171.
• Kobayashi, J., Ouchi, H., Mabuchi, H., Kikutake, T., 1994, Proceedings of the Second Int. Conf. on Interaction of Steels with Hydrogen in Petroleum Industry Pressure Vessel and Pipeline Service, Vienna, Austria, p. 143.
• Sojka, J., 2001, Odolnost konstrukčnich ocelí vůči agresivnimu působeni prostředí obsahujících sirovodík [Resistance of structural steels to aggressive impacts of environment containing hydrogen sulphide], Inaugural dissertation, VŠB - TU Ostrava.
• NACE Standard TM 0177-96: Laboratory Testing of Metals for Resistance to Sulfide Stress Cracking in H2S Environments, NACE Int., Houston Texas, USA.
• NACE Standard MR 0175-95: Sulfide Stress Cracking Resistant Metallic Materials for Oldfield Equipment, NACE Int., Houston Texas.