Material Degradation in KS D 3503 SS400 Rolled Steel at $179^{\circ}C$

KS D 3503 SS400 압연강 $179^{\circ}C$에서의 재질열화 연구

  • Baek, Un-Bong (Safety Metrology Group, Korea Research Institute of Standards and Science) ;
  • Park, Jong-Seo (Safety Metrology Group, Korea Research Institute of Standards and Science) ;
  • Nahm, Seung-Hoon (Safety Metrology Group, Korea Research Institute of Standards and Science)
  • 백운봉 (한국표준과학연구원 안전그룹) ;
  • 박종서 (한국표준과학연구원 안전그룹) ;
  • 남승훈 (한국표준과학연구원 안전그룹)
  • Published : 2006.08.31


In spite of frequent defect in industrial boilers, life assessment or diagnostic method for them has not been actively studied. In this research, SS400 carbon steel used in industrial boilers is simulated with artificial aging heat treatment. To do qualitative life assessment, differences in micro-structures and hardness of SS400 by the degradation time are studied. In addition, variation in material properties by aging was observed with the tensile test at room temperature and $179^{\circ}C$ and changes in ductile to brittle transition temperature was observed with the charpy impact test performed at several test temperature.


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