Copper Cathode Grade A

Description

1. Product Overview

Copper Cathode Grade A is a 99.99% minimum purity, electro-refined copper sheet produced under LME standards. It is the primary raw material for producing copper wire, rods, strips, and high-conductivity alloys used in power transmission, electric vehicles, and industrial electronics. The key value proposition lies in its ultra-low impurity profile (notably low lead, arsenic, and oxygen), which ensures high electrical conductivity (≥101% IACS), excellent cold workability, and minimal breakage during wire drawing. Strategically, it is critical as global copper demand outpaces mine supply; securing LME Grade A material de-risks production schedules and guarantees eligibility for premium futures contracts and physical delivery.

2. Key Specifications & Technical Characteristics

• Chemical composition (max impurities): Cu ≥ 99.99%; Ag ≤ 25 ppm; O₂ ≤ 10 ppm; Pb ≤ 2 ppm; As ≤ 2 ppm; Bi ≤ 1 ppm; S ≤ 15 ppm; Fe ≤ 10 ppm; Ni ≤ 10 ppm; Sb ≤ 2 ppm; Se ≤ 2 ppm; Te ≤ 2 ppm; total other impurities ≤ 30 ppm

• Purity level / grade: LME Grade A (equivalent to ASTM B170-99, BS 6017-1981, GB/T 467-2010)

• Physical characteristics: Flat sheet form, metallic reddish-orange color; sheet dimensions: 914mm x 914mm to 1050mm x 1050mm (±3mm); thickness: 12mm–14mm; each cathode weight: 65–125 kg; bulk density ~8.94 g/cm³

• Packaging options: Unitized bundles (1–2 MT) with steel strapping, shrink-wrapped; palletized 20–25 MT per container; or loose-loaded in 20ft/40ft containers with edge protectors

• Shelf life: Indefinite under dry, non-corrosive storage (avoid direct acid/alkali contact and high humidity >80% RH to prevent surface oxidation)

3. Core Industrial Applications

• Power & electrical cable manufacturing: Drawn into 0.10mm–20mm diameter wire for transmission lines, transformers, and EV charging infrastructure — outperforms lower-grade copper (99.90%) by reducing annealing frequency by 30% and improving conductivity by 4–5%.

• Renewable energy components: Used in photovoltaic ribbon, wind turbine generator coils, and battery busbars; low oxygen content eliminates hydrogen embrittlement during brazing.

• Industrial machinery & heat exchangers: Formed into tubes for HVAC and industrial radiators; high ductility allows tight-radius bending without cracking, cutting reject rates.

• Semiconductor & advanced alloys: Serves as base for oxygen-free high-conductivity (OFHC) alloys and copper-chromium contacts for vacuum interrupters — impurity profile extends contact life by 15–20% versus standard cathodes.

4. Competitive Advantages

• Quality consistency: Every production batch is spectrographically analyzed and issued with a Certificate of Analysis (CoA) traceable to refiner LME-registered code.

• Supply reliability: Direct supply agreement with integrated smelters operating at >90% capacity; ability to deliver 5,000–20,000 MT monthly on 15-day rolling schedule.

• Logistics capability: Pre-inspected, containerized loading at port of origin with experienced forwarders; demurrage risk <1% over 250+ shipments.

• Price competitiveness: LME-linked pricing minus negative basis (via long-term tolling agreements) plus fixed logistics adder — eliminating spot-market volatility premiums.

• Sustainability & compliance: Low-arsenic cathodes (As ≤ 2 ppm) reduce hazardous waste disposal costs; 100% of supply from mines adhering to ICMM (International Council on Mining and Metals) standards, supporting Scope 3 emissions reporting.

• Technical support: On-demand smelting and wire-drawing yield modeling provided by in-house metallurgists; custom packaging documentation for bonded warehouse or in-transit financing.

5. Commercial & Supply Information

• Minimum order quantity (MOQ): BULK 20MT (one standard loose-loaded or bundled 20ft equivalent)

• Loading capacity: 20–25 MT per 20ft dry container (if palletized); 20 MT flat per 20ft container (standard loose-loaded); 48–50 MT per 40ft HC container (double-stacked pallets)