Custom Double-Sided Copper Aluminum Composite Plates

Short Description:

Product Specifications
Name： Double-Sided Copper-Clad Aluminum Cu-Al-Cu Sandwich Plate
Standard： ASTM B432 (Cladding), ASTM B209 / B152, RoHS Compliant, REACH Compliant
Material： C11000 Pure Copper Layer (both sides) + High-Purity Aluminum Core (e.g., 1050 or 6063)
Surface： Mill Finish or Tin-Plated, Optional Protective Film
Thickness： 3mm – 30mm (Copper Layer 0.5-5mm per side)
Width： 300mm – 1500mm
Length： 1000mm – 6000mm (custom cut-to-length available)
Product Features:
Combines copper’s superior conductivity on both surfaces with aluminum’s lightweight advantage · Strong, permanent metallurgical bond with no delamination · Excellent corrosion resistance and long-term reliability · Cost-effective alternative to solid copper plates · Good thermal dissipation and mechanical strength · Easy to machine, bend, and install · Stable performance under vibration and thermal cycling
Application Field:
New energy vehicle battery packs and power distribution, Industrial switchgear and control panels, Renewable energy inverters and storage systems, Data center power rails, Transformer and generator bus systems, Marine and offshore electrical equipment

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Double-Sided Copper-Clad Aluminum Cu-Al-Cu Sandwich Plate – Process & Quality Assurance Statement
Our double-sided copper-clad aluminum Cu-Al-Cu sandwich plates are engineered to provide the optimal balance of conductivity, weight, and cost for modern high-current electrical systems, particularly in new energy vehicles and power distribution applications.

Key process features

Production integrates advanced cladding technology with precision rolling to ensure a strong, reliable bond on both sides:

●Material Preparation: High-purity aluminum core and C11000 copper sheets are selected and machined to create precise mating surfaces.
●Cladding Process: Explosion bonding or roll bonding creates a true metallurgical bond at the atomic level on both sides of the aluminum core.
●Hot Rolling / Consolidation: Controlled rolling further strengthens the interfaces while maintaining excellent electrical continuity.
●Annealing: Protective atmosphere annealing relieves residual stresses and optimizes conductivity without compromising the bond.
●Precision Finishing: Plates are leveled, cut to size, and edges chamfered as required; optional tin plating is applied for enhanced corrosion resistance.
●Surface Treatment: Final cleaning ensures pristine surfaces ready for immediate use.
●Packaging: Plates are interleaved with protective film and securely crated to arrive undamaged and ready for fabrication.

Quality control system

● Full traceability from raw copper and aluminum materials to finished plate
● Material test reports including conductivity, bond strength, and dimensional data provided with every shipment
● Sample retention ≥3 years for third-party verification (SGS, BV, TÜV, etc.)
● 100% inspection of essential parameters:
• Chemical composition and purity of both layers (spectrometric analysis)
• Bond integrity (ultrasonic and shear testing on both sides)
• Dimensional accuracy (CMM and ultrasonic thickness; typical tolerance ±0.2mm)
• Surface quality and plating thickness (where applicable; X-ray fluorescence)
• Electrical conductivity (eddy current testing)
● Internal standards exceed ASTM B432 and industry cladding requirements. Typical performance:
Conductivity approaching pure copper at contact surfaces while maintaining aluminum’s weight advantage, Excellent thermal transfer, Strong metallurgical bond with no delamination under thermal cycling or vibration.
● ISO 9001:2015 certified production ensures every double-sided copper-clad aluminum Cu-Al-Cu sandwich plate delivers consistent quality, reliability, and performance for your critical power systems.