Last December, POSCO and Ilsin Logistics held a christening ceremony for “Green Iris,” an LNG-powered bulk carrier. Green Iris is equipped with an LNG fuel tank made of POSCO’s high manganese steel, giving it its green name. Also, at 50,000 dwt, it is the largest carrier in the world.
Upon completion, the Green Iris will transport limestones from the port of Donghae in Gangwon-do to Gwangyang Works from the beginning of 2018.
POSCO’s high manganese steel allows the fuel tank to withstand temperatures as low as -196℃, so that it can store and transfer LNG. Moreover, it is highly weldable and cost-efficient compared to other common materials for LNG fuel tanks such as nickel steel or aluminum alloys.
POSCO developed the technology for its high manganese steel after 10 years of research since the late 2000s. Now, it is one of POSCO’s leading World Premium Products (WPP). Due to strengthening environmental regulations worldwide on emissions of sulfur oxides, nitrogen oxides and carbon dioxide from vessels, demand for high manganese steel for LNG tanks are expected to increase dramatically.
Cover photo courtesy of Gas Asia Summit.