An alloy for brake disc with decreased judder and car brake disc therefrom

摘要

PURPOSE: An alloy for brake disc with decreased judder is provided, which has improved wear resistance and braking performance. CONSTITUTION: The alloy for brake disc with decreased judder comprises C 3.7-3.8 wt%, Si 1.8-2.1 wt%, Mg 0.7-0.8 wt%, P 0.1 wt% or less(preferably 0.03 wt% or less), S 0.1 wt% or less, Cr 0.4-0.6%, Cu 0.3-0.5 wt%(preferably 0.4-0.5 wt%), Sn 0.06-0.08 wt%(preferably 0.07-0.08 wt%), Ca 0.01-0.04 wt%, and a balance of Fe.