Figure 5. Copper Substitution Eligibility Framework for AI, Grid, and Thermal Infrastructure

From a systems-engineering perspective, the framework treats electrical, thermal, mechanical, operational, and supply-chain performance as coupled variables. A substitute should not receive strategic credit simply because it reduces copper content in an individual component. It must also preserve required current-carrying or heat-transfer capability, fit within available space and routing constraints, integrate safely with adjoining materials and interfaces, satisfy applicable standards, remain maintainable over its intended service life, and avoid creating a more concentrated or difficult-to-reproduce dependency.

The figure is intended to support analysis of AI data centers, grid modernization, transformers, conductors, bus systems, cooling loops, cold plates, heat exchangers, and other mission-critical electrical and thermal infrastructure. It may also assist Congress, federal agencies, utilities, manufacturers, researchers, and procurement authorities in evaluating grants, tax incentives, standards, research programs, and industrial-policy interventions involving alternative materials.

The framework is not a certification standard or a universal ranking of substitute materials. It is a structured diagnostic screen intended to improve transparency, comparability, qualification discipline, and lifecycle decision-making. Its governing principle is that the appropriate policy objective is not maximum copper displacement, but a verified reduction in total infrastructure burden per unit of reliable, productive, maintainable, and resilient capacity.