Development of a 12% Cr Steel Rotor Forging for Geothermal Power Plants
- Conference
- New Zealand Geothermal Workshop
- Year
- 2001
- Session
- Materials, Corrosion & Scaling
- Language
- English
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Abstract
In order to increase the stress corrosion cracking (SCC) resistance of geothermal turbine rotor materials, a new 12%Cr steel has been developed. A fundamental study of the effect of alloying elements on SCC resistance was carried out, and an alloy composition of Fe-0.04%C-12%Cr-5%Ni- 0.05%N was selected. Verification tests conducted on a full size turbine rotor forging showed excellent results.
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