Product Overview
67/33 Copper Zirconium is a copper-zirconium master alloy with a nominal composition of 67% Cu and 33% Zr. Zirconium acts as a grain refiner and deoxidizer in copper alloys producing finer as-cast microstructures that improve mechanical properties — particularly elongation, fatigue strength, and work hardening response — while preserving the high electrical conductivity that is the defining property of copper alloys for electrical applications. This master alloy is used for zirconium additions to copper, beryllium copper, chrome copper, and other precipitation-hardening copper alloy systems where grain refinement of the as-cast structure improves response to subsequent age hardening treatments. The 67/33 composition provides a copper-rich matrix that promotes dissolution in copper alloy heats while delivering a high concentration of zirconium per addition unit. Available in 1 inch x 6 inch x 12 inch broken slabs and 5 gram and down pieces to serve both production foundry and precision small-scale addition requirements.
