Daewoo Shipbuilding & Marine Engineering has succeeded in developing high manganese steel for use in LNG storage systems. The company explained that the new development would contribute to the diversification of LNG storage system materials and the comparative advantage of the Korean shipbuilding industry against those of Japan and China.
At present, ultra-low temperature materials such as aluminum alloys, nickel alloy steel, and stainless steel are mainly used in LNG storage tanks, as LNG has to be transported in a liquefied state at minus 163 degrees Celsius below zero. However, these materials have their own limitations in terms of strength and the ease of processing. Besides, they contain an amount of nickel that is too expensive for price competitiveness to be ensured.
Meanwhile, manganese is much cheaper yet has ultra-low temperature properties. The unit cost of manganese is approximately 53 percent of that of an aluminum alloy, and a manganese-based LNG storage tank can be produced at 56 percent of the cost of an aluminum alloy-based one.
Daewoo Shipbuilding & Marine Engineering has worked on the high manganese steel since November 2010. The company is planning to apply the steel to the stand-alone LNG storage tanks it recently developed on its own, which are scheduled to be mounted on LNG carriers and FPSOs.
The Original Posted by Jung Suk-yee /BusinessKorea