1199 Aluminum Coil

Al 1199 Aluminum Coil is a laboratory-grade 1xxx series aluminum coil with a minimum aluminum content of 99.99%, supplied in a continuous-feed reel format and representing the highest-purity designation within the standard 1xxx series. With electrical conductivity of ~61–62% IACS and thermal conductivity approaching 234 W/m·K, 1199 achieves the maximum conductivity available in a wrought 1xxx series product — a direct consequence of the near-total elimination of iron, silicon, and other elements from the aluminum matrix, minimizing solid-solution electron scattering to the lowest achievable level in commercial coil form. The native oxide layer is exceptionally thin and chemically uniform, supporting precise anodization control and high-quality oxide film formation in roll-to-roll processing. Al 1199 coil is used as a conductivity reference standard in electrical and thermal conductivity research, where its well-characterized purity makes it the benchmark against which alloy conductivity reductions from added elements are measured. In processing applications, it is used for precision transformer winding, high-frequency inductor stock, and capacitor electrode material where maximum conductivity and minimal resistive losses are required. Roll-to-roll anodization of 1199 coil produces anodic aluminum oxide films with exceptionally ordered pore structures due to the very low impurity density. Al 1199 is recognized in the literature as the standard high-purity reference for 1xxx series conductivity studies.