1050 Aluminum Foil

Al 1050 Aluminum Foil is a commercially pure 1xxx series aluminum foil with a minimum aluminum content of 99.5%, combining high electrical conductivity (~57–59% IACS), thermal conductivity of ~218 W/m·K, and low density (2.71 g/cm³) in a flexible sheet format available across a range of gauges and tempers. The low total alloying element content of 1050 minimizes solid-solution electron scattering, preserving conductivity close to that of pure aluminum while the small additions of iron and silicon provide slightly improved mechanical strength and work-hardening response compared to higher-purity grades. The naturally passivating oxide layer provides corrosion resistance without surface treatment, and the alloy's high ductility enables deep drawing, embossing, and precision cutting without cracking. In the annealed condition, 1050 foil is used in flexible packaging, thermal barrier laminates, and EMI shielding wraps where barrier performance and formability are the primary requirements. Hard and half-hard tempers supply increased tensile strength for capacitor electrode stock, heat exchanger fin material, and cable shielding applications where dimensional stability under mechanical load is needed. Surface quality and anodization response also support use in decorative and functional oxide coating applications. Al 1050 foil is a standard reference material in research on 1xxx series thermomechanical processing and conductivity optimization.