The effect of weld repair on high temperature properties of aged 2.25Cr-1Mo steel

Yoshio Takagi, Shigeru Otsuki, Takuya Ito, Isamu Nonaka

Research output: Contribution to journalArticlepeer-review


The performance of repair welds on service-aged 2.25Cr-1Mo header using SMAW with post weld heat treatment was experimentally evaluated. Creep rupture life of the repair weldment was almost the same as that of service-aged base metal and repair weld was not a weak link. The remaining creep rupture life of aged weldment was improved by repair welding. In creep-fatigue test with strain holding, the fully repair-welded specimen showed almost the same creep-fatigue life as that of new weldment, however, the partially repair-welded specimen showed a shorter creep-fatigue life. FEM analysis revealed that the deformation behavior of repair weldment was quite different from that of new weldment and strain concentrated on softened aged metal.

Original languageEnglish
Pages (from-to)167-172
Number of pages6
JournalZairyo/Journal of the Society of Materials Science, Japan
Issue number2
Publication statusPublished - 2003 Feb


  • 2.25Cr-1Mo steel
  • Creep fatigue strength
  • Creep rupture life
  • FEM analysis
  • Weld repair

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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