Property Aluminium Ingots Aluminium Billets Shape Rectangular with tapered ends Cylindrical with a uniform cross-section Weight Typically 6-25 kg per ingot Varies, typically 500-2000 kg per billet Length Typically 600-800 mm Varies, usually 3-7 meters Width Typically 150-300 mm Diameter varies, usually 100-500 mm Thickness Typically 50-150 mm Not applicable Surface Finish Generally smooth, sometimes with visible marks Smooth, often with a matte or polished surface Purity Usually 99.7% to 99.9% Varies, depending on alloy composition