YIELDABILITY – The ability of the sand mixture to decrease in volume so as not to limit the contraction of a solidifying casting.

YELLOW BRASS – An alloy of about 70% copper and 30% zinc.

YIELD POINT – The stress at which a marked increase in deformation occurs without an increase in load stress as seen in mild steel or medium carbon steel. This phenomenon is not seen in non-ferrous metals and other alloy steels.