Heat resisting steels.

摘要

A heat-resisting steel suitable for use in valve parts of internal combustion engine is disclosed, which consists by weight percentage of 0.3 - 0.5% of C, 0.5 - 2.5% of Si, 0.1 - 2.0% of Mn, 0.5 - 7.0% of Cr, 0.3 - 2.0% of Mo and 0.1 - 1.0% of V as basic ingredients, at least one of 0.3 - 2.0% of Cu and 0.001 - 0.05% of REM as sub-ingredients, and if necessary, at least one of 0.1 ~ 2.0% of Ni, 0.1 ~ 1.5% of W and 0.03 - 1.0% of Nb + Ta, and the balance of Fe and inevitable impurities.