Thor™ 115


The improved solution to maximize efficiency for gas turbines

Thor™ 115 is a new steel alloy for tubes developed by Tenaris to ensure better steam oxidation at high temperature.

An evolution of the ASTM grade 91, Thor™ 115 has an increased Cr content that, besides allowing a better steam oxidation resistance, provides suitable alloying balance to provide a fully martensitic microstructure and stability of the strengthening precipitates after long-term ageing.

Because of its high-performance characteristics, Thor™ 115 allows power plant engineers to reach the full potential of modern gas and steam turbines in combined cycle power plants.

Thor™ 115 provides these advantages:

  • Increased steam oxidation resistance (working at above 600°C)
  • Long term stability based on modified microstructure
  • Superior creep behavior than grade 91.

Steam Oxidation

Thor™ 115 went through long duration steam oxidation testing at the Oak Ridge National Laboratory along with SA-213 T91 .The results confirmed that Thor™ 115’s oxidation is similar from 600 to 650 °C, while T91 oxidation accelerates.


Our Site uses cookies. By using our Site (through any device) you agree that our rules on use of cookies as contemplated in our Terms & Conditions shall apply.
We may revise and update the applicable rules at anytime, therefore, we recommend visitors and users to periodically review the rules of use of cookies to ensure that visitors and users are aware of any changes.