Excellent heat resistance and corrosion resistance are required for rings which are always exposed to high temperature gas and oil or molten metals. Used for piston ring of die casting machine and oil seal of supercharger.
Uniform distribution of nodular graphite in the tempered Martensite or Bainite structure, It has good oil scraping and gastight properties, good break resistance and durability, suitable 2nd ring of for four-cycle engines.
Steel combined oil ring, Hard Cr plating and lapping on rails working faced, most effective for improving oil consumption performance and durability. for diesel engines used in small-sized passenger cars.
Salt bath soft nitride of spacer exp., gas nitrided of stainless steel rails.
Low inertia force at the time of high speed operation because of light weight, wide passage area for oil draining, excellent durability.