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A390.1 Aluminum Alloy
Hypereutectic Al-Si alloy (77.9% Al, 17% Si, 4.5% Cu, 0.6% Mg) with superior wear resistance and low thermal expansion. Engine...Hypereutectic Al-Si alloy (77.9% Al, 17% Si, 4.5% Cu, 0.6% Mg) with superior wear resistance and low thermal expansion. Engine block grade. 4-18 ingot.Lead-freeSuperior Wear Resistance Low Thermal Expansion Hypereutectic Si Engine Block GradeSolidus945°F (507°C)Liquidus1,200°F (649°C)Density0.099 lbs/in³ (2.73 g/cm³)Primary ElementsAl · Si · Cu · MgNominal Composition0.6% Mg, 17% Si, 4.5% Cu, 77.9% Al
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