Applicability of newly developed 610MPa class heavy thickness high strength steel to boiler pressure vessel
- Ishikawajima-Harima Heavy Industries Corp., Yokohama (Japan)
- Ishikawajima-Harima Heavy Industries Corp., Tokyo (Japan)
- Ishikawajima-Harima Heavy Industries Corp., Aioi (Japan)
Construction of a 350 MW Class PFBC (Pressurized Fluidized Bed Combustion) boiler plant is under planning in Japan. Design temperature and pressure of the vessel are maximum 350 C and 1.69 MPa, respectively. As the plate thickness of the vessel exceeds over 100 mm, high strength steel plate of good weldability and less susceptible to reheat cracking was required and developed. The steel was aimed to satisfy the tensile strength over 610 MPa at 350 C after postweld heat treatment (PWHT), with good notch toughness. The authors investigated the welding performances of the newly developed steel by using 150 mm-thick plate welded by pulsed-MAG and SAW methods. It was confirmed that the newly developed steel and its welds possess sufficient strength and toughness after PWHT, and applicable to the actual pressure vessel.
- OSTI ID:
- 122650
- Report Number(s):
- CONF-950740--; ISBN 0-7918-1328-2
- Country of Publication:
- United States
- Language:
- English
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