Milestone MS9
“… short-time creep strength better than P91.” The diagram shows that the creep strength is even much better than that of P92. Some of the tests show 20 times longer lifetime than P92, and are still running (arrows).
Upscaling: Large forging (12 t)
Due to the size of the forging the hold times during the heat treatment must be longer than for the laboratory specimens. Hence the mechanical properties are not exactly the same.
Multipass welding of thick-section ring from large forging (33 passes)
Temperature in the heat affected zone during the last passes at R = 145 mm
Hoop stress after welding
The Z-Ultra project is funded by FP7 under NMP.2012.2.2-3 - Advanced materials for high-temperature power generation call with Grant agreement no: 309916.
Fraunhofer Institute for Mechanics of Materials IWM
