Patent ID: 8288928

Claim:
An electrode material for a spark plug comprising from 0.5 to 1.5 wt. % of Si, from 0.5 to 1.5 wt. % of Al, from 0.02 to 1.0 wt. % of at least one of Ti, V, Zr, Nb and Hf, from 0.03 to 0.09 wt. % of C, 95.5 wt. % or more of Ni, and 0.5 wt. % or less of Cr and Mn in total; and having a specific resistance at 20Â° C. of 25 Î¼Î©cm or less, wherein said electrode material has an initial average crystal grain diameter of 35 Î¼m or less and has an average crystal grain diameter of 300 Î¼m or less after being held at 900Â° C. for 100 hours.