Creep performance of steels for challenging applications

Pertti Auerkari, Pekka Nevasmaa, J. Salonen, Stefan Holmström

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

Increasing thermal loads, temperatures and pressures can be attractive to improve the efficiency and operational economy of power and process plants. With increasingly variable supply from renewable sources, however, thick-wall components and their materials like steels that may perform well under steady loads at high temperatures and pressures can be significantly challenged by the new regime of service. In addition, in high temperature plant the issue can arise also in the creep dominated base load case, when higher strength structural material is selected to limit section size, but other material and weldment properties intervene with complications from reduced creep ductility, unfavourable weld behaviour or less than optimal thermal properties. In this paper, we compare conventional and newer low and high alloy creep resistant steels in terms of expected and observed material properties and suitability for the changing modes of operation. Examples include the experience and suggested limitations in power plant application with e.g. welded T/P23 and T/P24 in comparison with conventional low alloy steels, and with newer and conventional austenitic steels
Original languageEnglish
Title of host publicationProceedings of 3rd International ECCC- Creep & Fracture Conference
Number of pages10
Publication statusPublished - 2014
MoE publication typeA4 Article in a conference publication
Event3rd International ECCC- Creep & Fracture Conference "Creep & Fracture in High Temperature Components, Design & Life Assessment" - Rome, Italy
Duration: 5 May 20147 May 2014

Conference

Conference3rd International ECCC- Creep & Fracture Conference "Creep & Fracture in High Temperature Components, Design & Life Assessment"
CountryItaly
CityRome
Period5/05/147/05/14

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Creep
Steel
Austenitic steel
Thermal load
High strength steel
Temperature
Ductility
Materials properties
Power plants
Welds
Thermodynamic properties

Cite this

Auerkari, P., Nevasmaa, P., Salonen, J., & Holmström, S. (2014). Creep performance of steels for challenging applications. In Proceedings of 3rd International ECCC- Creep & Fracture Conference [61]
Auerkari, Pertti ; Nevasmaa, Pekka ; Salonen, J. ; Holmström, Stefan. / Creep performance of steels for challenging applications. Proceedings of 3rd International ECCC- Creep & Fracture Conference. 2014.
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Auerkari, P, Nevasmaa, P, Salonen, J & Holmström, S 2014, Creep performance of steels for challenging applications. in Proceedings of 3rd International ECCC- Creep & Fracture Conference., 61, 3rd International ECCC- Creep & Fracture Conference "Creep & Fracture in High Temperature Components, Design & Life Assessment", Rome, Italy, 5/05/14.

Creep performance of steels for challenging applications. / Auerkari, Pertti; Nevasmaa, Pekka; Salonen, J.; Holmström, Stefan.

Proceedings of 3rd International ECCC- Creep & Fracture Conference. 2014. 61.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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N2 - Increasing thermal loads, temperatures and pressures can be attractive to improve the efficiency and operational economy of power and process plants. With increasingly variable supply from renewable sources, however, thick-wall components and their materials like steels that may perform well under steady loads at high temperatures and pressures can be significantly challenged by the new regime of service. In addition, in high temperature plant the issue can arise also in the creep dominated base load case, when higher strength structural material is selected to limit section size, but other material and weldment properties intervene with complications from reduced creep ductility, unfavourable weld behaviour or less than optimal thermal properties. In this paper, we compare conventional and newer low and high alloy creep resistant steels in terms of expected and observed material properties and suitability for the changing modes of operation. Examples include the experience and suggested limitations in power plant application with e.g. welded T/P23 and T/P24 in comparison with conventional low alloy steels, and with newer and conventional austenitic steels

AB - Increasing thermal loads, temperatures and pressures can be attractive to improve the efficiency and operational economy of power and process plants. With increasingly variable supply from renewable sources, however, thick-wall components and their materials like steels that may perform well under steady loads at high temperatures and pressures can be significantly challenged by the new regime of service. In addition, in high temperature plant the issue can arise also in the creep dominated base load case, when higher strength structural material is selected to limit section size, but other material and weldment properties intervene with complications from reduced creep ductility, unfavourable weld behaviour or less than optimal thermal properties. In this paper, we compare conventional and newer low and high alloy creep resistant steels in terms of expected and observed material properties and suitability for the changing modes of operation. Examples include the experience and suggested limitations in power plant application with e.g. welded T/P23 and T/P24 in comparison with conventional low alloy steels, and with newer and conventional austenitic steels

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Auerkari P, Nevasmaa P, Salonen J, Holmström S. Creep performance of steels for challenging applications. In Proceedings of 3rd International ECCC- Creep & Fracture Conference. 2014. 61