Overview
Scrap copper core consists of discarded copper conductors, primarily from electrical cables, motors, or transformers. As one of the most recycled metals globally, copper retains over 90% of its original properties after reprocessing, making it a sustainable material choice. Recycling scrap copper reduces mining demand and energy consumption by up to 85% compared to virgin copper production. B2B buyers often categorize it by grade (e.g., Bare Bright, #1 Copper) based on purity and form.
Physical and Chemical Properties
Copper’s atomic structure grants it exceptional conductivity—second only to silver among pure metals. Its face-centered cubic lattice allows easy electron flow, yielding 58 MS/m electrical conductivity and 401 W/(m·K) thermal conductivity. Chemically, copper resists corrosion via a protective oxide layer but may tarnish in humid or sulfur-rich environments. Scrap cores typically exhibit 99–99.9% purity, with trace elements like oxygen or iron affecting performance in high-end applications.
Main Applications
Recycled copper cores are remelted into rods or wires for electrical infrastructure, including building wiring (60% of recycled use) and power transmission lines. The automotive industry uses them in alternators and connectors. Non-electrical applications include plumbing fittings, heat exchangers, and antimicrobial surfaces. Lower-grade scrap may be alloyed with zinc (brass) or tin (bronze) for decorative or mechanical components.
Safety and Storage
While copper is non-flammable and non-toxic, scrap cores may harbor insulation residues or metal shards. Store in sealed containers to minimize oxidation; moisture accelerates patina formation, reducing conductivity. Recycling facilities often use electrostatic separators or cryogenic processing to isolate copper from plastics. Workers should wear cut-resistant gloves and goggles when handling fragmented scrap.
B2B Procurement Guide
Buyers should request mill test reports (MTRs) confirming purity levels—Bare Bright scrap must be ≥99.9% Cu. Magnetic separation tests help detect iron contamination. Pricing follows LME (London Metal Exchange) benchmarks plus regional premiums. Bulk shipments (20+ metric tons) often secure 5–10% discounts. Consider proximity to smelters to reduce logistics costs, as copper’s density makes transportation expensive.
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