Al–7Si alloy was prepared by melting commercially pure aluminum (99.7%) along with Al–20%Si master alloy in clay graphite crucible in a pit type resistance furnace under a cover flux (45% NaCl +45% KCl + 10% NaF) and the melt was held at 720 °C. After degassing with 1% solid hexachloroethane, master alloy chips duly packed in aluminum foil were added to the melt for grain refinement. For modification Al–10%Sr master alloy was used with addition level being kept constant at 0.02 wt.% Sr