1200 Aluminum Disk

Al 1200 Aluminum Disk is a commercially pure 1xxx series aluminum disk with a minimum aluminum content of 99.0%, offering a defined planar geometry with consistent surface area and thickness for corrosion testing, electrochemical studies, and industrial sample applications where the slightly higher strength of 1200 relative to 1050 or 1070 is advantageous. With electrical conductivity of ~55–57% IACS and thermal conductivity of ~205 W/m·K, 1200 has the lowest conductivity of the commercially pure 1xxx series disks — a reflection of its higher permitted iron and silicon content, which increases solid-solution electron scattering relative to purer grades. The naturally passivating oxide layer provides a reproducible corrosion-resistant surface, and the higher impurity content gives 1200 slightly improved mechanical properties and wear resistance compared to 1050 at equivalent temper. Al 1200 disks are used as corrosion test coupons in salt-spray, immersion, and electrochemical studies where the alloy's commercial-purity composition is the test variable, as working electrodes in electrochemical cells requiring a standard-grade aluminum surface, and as anodization blanks for industrial oxide coatings where surface uniformity is required but 4N-grade purity is not. The fixed disk geometry supports use as thermal diffusivity specimens and stamped blanks for further forming in prototype and small-batch manufacturing. Al 1200 is a standard reference alloy for commercial-purity aluminum processing research.