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A Study on the Materials Characteristics of SM570TMC Plates  

Im, Sung Woo (포항산업과학연구원 강구조연구소)
Kim, Yo Suk (포항산업과학연구원 강구조연구소)
Chang, In Hwa (포항산업과학연구원 강구조연구소)
Publication Information
Journal of Korean Society of Steel Construction / v.17, no.3, 2005 , pp. 365-373 More about this Journal
Abstract
There is increasing need for high-strength steel especially for the high-rise steel building structure. High- strength steels, however, may have mechanical properties that are significantly different from those of the conventional steels.The application of high-strength steels to building structures should be reviewed as to whether inelastic behavior equivalent to that of conventional steels can be attained or not. In this study, SM570TMC steel, which was developed recently in Korea, was tested to evaluate mechanical properties and welding characteristics for use as a structural steel. Yield phenomenon of SM570TMC steel, which is continuous yielding, is quite different from that of conventional steel. The distributions of yield strength of SM570TMC steel were uniform regardless of thickness, while the minimum yield strength was 440MPa. Also, the flat distributions of hardness in z-direction were found to comprise one of the important properties. Results of the charpy impact tests at -5oC revealed toughness values of SM570TMC steel, which were higher than those of equivalent as rolled steel. Carbon equivalent(Ceq) values of SM570TMC steel, which were related to welding performance, were lower than those of equivalent as rolled steel.
Keywords
Continuous Yielding; Yield Ratio; Lamellar Tear; y-groove Cracking Test; TMC; Microstructure; Welding Process;
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  • Reference
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