356 Aluminum Casting AlloyFabricating Characteristics Rating Resistance to Hot Cracking E Pressure Tightness E Fluidity E Solidification Shrinkage E Elev. Temperature Strength G Corrosion Resistance VG Machining F Polishing G Gas Welding E Arc Welding E Brazing No Normally Heat Treated Yes RatingsE - Excellent VG - Very Good G - Good F - Fair P - PoorChemical Composition Silicon 6. 5% to 7. 5% Iron . 50% max. Copper . 25% max. Manganese . 35% max. Magnesium . 25% to . 45% Zinc . 35% max. Titanium . 25% max. Aluminum 91. 0% to 93. 0% Outstanding Characteristics