Abstract
The 304HCu austenitic stainless steel tubes are being produced for the first time indigenously in India. Creep tests have been carried out at 923 and 973 K on two heats with different solution annealing conditions. Stress levels ranged from 180 to 300 MPa at 923 K and 100 to 170 MPa at 973 K. The creep curves showed a small instantaneous strain followed by primary, secondary and tertiary creep stages. The rupture lives varied in the range of 50–8700 hours. Higher rupture life was observed in the heat with higher solutionising temperature. The variation of creep rupture life with applied stress at different temperatures is compared with internationally reported data and it is found that the indigenous 304HCu SS tube material has creep rupture strength comparable with internationally reported data. The variation of steady state creep rate with stress showed a power law relationship. Rupture ductility was generally found to decrease with increase in rupture life. SEM fractography revealed mixed mode failure with predominance of intergranular creep cavitation.
Similar content being viewed by others
References
A. K. Bhaduri, K. Laha, S. K. Albert, T. Jayakuar and S. C. Chetal, Proceeding of 41 st MPA-Seminar, Stuttgart (2015).
H. Okada, Y. Sawaragi, F. Masuyama and N. Komai “Mechanical Properties and Microstructure of 0.1C-18Cr-9Cr-3Cu-Nb,N Steel Tube after Long Term Exposures in a Power Boiler” CREEP 7, Proc. Of the 7th International conference on Creep and Fatigue at Elevated Temperatures, The Japan Society of Mechanical Engineers, June 3–8, 2001, NIMS, Tsukuba, Japan.
Y. Sawaragi, K. Ogawa, S. Kato, A. Natori and S. Hirano, “Development of the Economical 18-8 Stainless Steel (SUPER 304H) having High Elevated Temperature Strength for Fossil Fired Boilers” The Sumitomo Research, No. 48, January, 1992, Sumitomo Metal Industries, Ltd., Osaka & Tokyo, Japan.
“DMV 304HCu” Salzgitter Mannesmamm Stainless Tubes-report
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Ganesan, V., Laha, K. & Bhaduri, A.K. Creep Rupture Properties of Indigenously Developed 304HCu Austenitic Stainless Steel. Trans Indian Inst Met 69, 247–251 (2016). https://doi.org/10.1007/s12666-015-0779-2
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12666-015-0779-2