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http://dx.doi.org/10.5781/JWJ.2014.32.3.89

Cryogenic Charpy Impact Test based on GTAW Method of AISI 304 Stainless Steel for LNG Pipeline  

Kim, Jeong-Hyeon (Dept. of Naval Architecture and Ocean Engineering, Pusan National University)
Choi, Sung-Woong (Dept. of Extreme Energy Systems, Korea Institute of Machinery and Materials)
Park, Doo-Hwan (Dept. of Naval Architecture and Ocean Engineering, Pusan National University)
Lee, Jae-Myung (Dept. of Naval Architecture and Ocean Engineering, Pusan National University)
Publication Information
Journal of Welding and Joining / v.32, no.3, 2014 , pp. 89-94 More about this Journal
Abstract
AISI 304 austenitic stainless steel is widely used for LNG pipes for LNG transmission thanks to its good metallurgical and mechanical properties. In the present research, impact toughness of a gas tungsten arc welded AISI 304 stainless steel pipe was evaluated between room and liquid nitrogen ($-196^{\circ}C$) test temperatures. In addition, a comparative study was made of the fracture behavior of FCC crystal structured stainless steel weldments and BCC crystal structured mild steels(A-grade and SS400). The results showed a slight decrease in the impact energy of the AISI 304 base metal, heat affected zone(HAZ), and welded zone with decreasing test temperature. In addition, the welded metal has the highest absorbed impact energy, followed by HAZ and the base metal.
Keywords
Charpy V-notch impact test; Welded LNG pipe; AISI 304 austenitic stainless steel;
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Times Cited By KSCI : 1  (Citation Analysis)
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