A 14-year US Department of Energy (DOE) and Ohio Coal Development Office (OCDO) program to develop the materials technology to build and operate an advanced ultra-supercritical (A-USC) boiler and turbine with steam conditions up to 760°C (1400°F) and 35MPa (5000psi) has been completed...
The target stress value for 100 000 h creep-rupture strength is usually 100 MPa for base metal at the operating temperature. Critical issues for long-term safe operation of candidate Ni-base alloys and martensitic 9%−12% Cr steels for A-USC power plants include oxidation resistance in ...