Honda Giken Kogyo Kabushiki Kaisha

Daido Tokushuko Kabushiki Kaisha

Honda Giken Kogyo K.k.

Daido Tokushuko K.k.

Susumu Isobe

Yoshiaki Takagi

Kenkichi Matsunaga

Norikatsu Sato

An alloy for use in an exhaust valve of an automotive vehicle is disclosed, which consists of C: 0.01-0.15%, Si.ltoreq.2.0%, Mn.ltoreq.0.5%; Cr: 15-25%, Mo: 0.4-3.1% and W: 0.2-3.8% so that (Mo+1/2W) is 0.5 to 5.0%, Nb+Ta: 0.3-3.0%, Ti: 1.5-3.5%, Al: 0.5-2.5%, B: 0.001-0.02%, Fe.ltoreq.5% and the balance of Ni or Ni+Co.

Alloys for exhaust valve

An alloy for use in exhaust valves is disclosed, which consists by weight percentage of 0.01.about.0.15% of C, not more than 2.0% of Si, not more than 2.5% of Mn, 53.about.65% of Ni, 15.about.25% of Cr, 0.3.about.3.0% of Nb, 2.0.about.3.5% of Ti, 0.2.about.1.5% of Al, 0.0010.about.0.020% of B, and the remainder being substantially Fe. If necessary, the alloy further contains at least one element selected from 0.001.about.0.030% of Mg, 0.001.about.0.030% of Ca and 0.001.about.0.050% of REM.

Alloys for exhaust valves

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Aichi, Japan

Susumu Isobe