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Creep Property Group

In order to reduce CO2 emissions, it is required to improve the efficiency of high temperature equipment such as power generation and jet engine. Development of a 700 ˚C class advanced ultra-supercritical (A-USC) power generation are ongoing, which can reduce CO2 emissions by more than 10%. Because the temperature and stress conditions for heat resisting alloys become severe, it is important to develop the safety and reliability assessment technologies and to improve the high temperature strength of heat resisting alloys. Creep property group has been conducting research and development concerning high temperature strength of heat resisting alloys and components. The preset research subjects are as follows:

"Large creep testing machine (Maximum load: 50 ton)" Image

Large creep testing machine (Maximum load: 50 ton)


"Creep crack growth test" Image

Creep crack growth test


  1. Development of the new technologies for next generation thermal power plant/Creep damage evaluation of Ni base alloys used for A-USC plant.
  2. International standardization of high temperature fracture mechanics test method (creep-fatigue crack growth test method) for heat resisting alloy and weld.
  3. Evaluation of multi-axial stress effect on the creep life of the welded component for high Cr steels.
  4. Development of the high B-9Cr steel and evaluation for long-term reliability.
  5. Improvement of heat resisting property of Ti alloys.





"Long-term creep strength for 9Cr steel and weld" Image

Long-term creep strength for 9Cr steel and weld



"Advanced ultra-supercritical (A-USC) power plant that reduces CO2 emissions more than 10%." Image

Advanced ultra-supercritical (A-USC) power plant that reduces CO2 emissions more than 10%.



"Creep strength of developed steel in NIMS (MARBN steel) and dissimilar weld joint for A-USC power plant." Image

Creep strength of developed steel in NIMS (MARBN steel) and dissimilar weld joint for A-USC power plant.



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Creep Property Group
1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047 JAPAN
E-Mail: TABUCHI.Masaaki=nims.go.jp(Please change "=" to "@")