Patents Assigned to Isuzu Motors Limited and Nippon Steel Corporation
  • Steel for machine structural use and machine parts made from such steel
    Patent number: 5993571
    Abstract: A steel for machine structural use, essentially having the following chemical composition:C: 0.45-0.60 wt %,Si: 0.50-2.00 wt %,Mn: 0.10-0.30 (0.30 not inclusive) wt %,P: 0.01-0.10 wt %,S: 0.01-0.20 wt %,V: 0.08-0.15 wt %, andN: 0.0020-0.0050 (0.0050 not inclusive) wt %. The remainder is Fe and impurities inevitably included. The inner structure of the steel is a ferrite-pearlite structure.
    Type: Grant
    Filed: November 18, 1998
    Date of Patent: November 30, 1999
    Assignee: Isuzu Motors Limited and Nippon Steel Corporation
    Inventors: Hirohito Eto, Hiromasa Takada, Tetsuroh Hashiguchi, Osamu Ohyama