New Generation Ferritic Steels for more Efficient Power Plants
(Room Rheinsaal 2)
28 Jun 17
4:00 PM
-
5:30 PM
Tracks:
Track F - Steam Based Generation
Heat-recovery steam generators, downstream new generation gas turbines, aim at increasing efficiency by operating at higher steam temperature, thus presenting new challenges for material manufacturers. The creep strength-enhanced steel family is especially interesting for manufacturing a wide array of components, thanks to their ease of manufacturing, desirable physical properties, and weldability. Currently available 9% Cr grades are however temperature limited by oxidation, which causes material loss and clogging of the steam line; whereas 12% Cr solutions have often presented manufacturing challenges, and difficulties in guaranteeing long-term properties. In this frame, Tenaris has developed a new High Oxidation Resistance steel, Thor 115, which provides a significant improvement in oxidation resistance while maintaining manufacturability and reliable long-term properties, demonstrated by extensive testing. This work presents an overview of the new Tenaris material, covering laboratory testing and field trials, and illustrates potential applications in new generation power plants.