The completion of development of the high temperature corrosion resistance exhaust valve for 2 strokes diesel engines Commercialization to UE engine

Tokyo, Japan, April 4, 2016 - Mitsubishi Heavy Industries Marine Machinery & Engine Co., Ltd. (MHI-MME), apply DSAⓇ760,which is developed by DAIDO STEEL Co., Ltd , to the exhaust valve for UE engine to achieve the lifetime extension and higher reliability under low speed operation of 2 strokes diesel engines.

The exhaust valve made of DSAⓇ760 was verified that it has high corrosion resistance compared with NIMONIC one by verification examination on vessel with large bore sized UE engine for abt. 1.5 years. DSAⓇ760 exhaust valve will be commercialized to satisfy the customer needs for low speed operation.

This DSAⓇ760 is the heat-resistant alloy which added chromium and aluminum in proper balance to nickel. And It also has the high temperature strength compared with existing the heat-resistant alloy and the resistance of the high temperature corrosion, which become a problem by diesel engine.

It is estimated that the wear rate of combustion surface　decreases about 60%, and a lifetime extends about 2.5 times, as a result of verification examination.

MHI-MME will continue to propose various new technology development and high reliability measures to enhance seagoing energy efficiency and environmental preservation efforts.

※DSAⓇ760 is an abbreviation for Daido Super Alloy No.760. DSAⓇ is a registered
trademark of Daido Steel Co., Ltd.。