Industry Insight: Stringent Demands for Material Precision in Heat Exchange and Manufacturing

In modern industrial manufacturing, automotive heat exchange systems (such as condensers and evaporators), and precision electronic tube processing, the chemical composition tolerances, physical dimension accuracies, and cladding integrity of aluminum alloy strips and foils determine the yield rate of subsequent stamping, forming, and brazing. Standard commercial grades often fail to simultaneously meet high-strength, anti-corrosion, and specific brazing requirements. WONDERY satisfies these critical needs through specialized rolling and micron-level multi-layer cladding technologies.

Technical Solutions and Parameterized Evidence

1. Premium 3003 Aluminium Alloy Strips (Aluminium Coil)

To balance tensile strength and ductility during continuous stamping, WONDERY implemented strict grain structure control for the 3003 alloy:

• Multi-Specification Rolling: This project involved the concurrent delivery of two distinct widths of heavy-duty coils under the same grade (Aluminium Alloy 3003). The specifications are: Thickness 1.5 mm / Width 38 mm (ID: 500mm) and Thickness 1.5 mm / Width 16 mm (ID: 500mm), with 15 rolls (~1200 kg in total) delivered for each specification.

• Quality Consistency: Precision winding guarantees burr-free edges and micron-level thickness tolerances throughout hundreds of meters of uncoiling, preventing strip breakage or premature die wear during high-speed stamping.

2. Advanced 4343/3003/4343 Three-Layer Clad Aluminium Foil (Aluminium Strip)

The core challenge in manufacturing heat exchanger fins and tubes lies in brazing performance. WONDERY resolved this by providing high-performance clad sandwich materials:

• Structural Composition: Features a multi-layer Aluminium Alloy 4343/3003/4343 composite structure with a thickness of just 0.1 mm and a width of 16 mm (ID: 200mm). A total of 25 rolls (~1000 kg) were delivered.

• Brazing Process Optimization: The core layer (3003) provides excellent structural strength and corrosion resistance, while the outer clad layers (4343) act as low-melting-point filler metals. During controlled atmosphere brazing (CAB) or vacuum brazing, the outer layers melt to form seamless joints while the core remains intact, eliminating the risks of cold joints or leakage.

• Bonding Integrity: Utilizing advanced hot-roll bonding, molecular-level interface fusion is achieved, preventing any delamination during subsequent reduction down to 0.1mm.

3. 0.08mm Ultra-Thin Radiator Aluminium Foil

• Ultra-Thin Processing: For high-efficiency cooling fin manufacturing, WONDERY delivered Aluminium Alloy 3003 foil with an ultra-thin specification of 0.08 mm thickness and 44 mm width (ID: 200mm), totaling 25 rolls (~1000 kg).

• Packaging and Protection: Because 0.08mm foil is highly susceptible to wrinkling and damage, a standardized moisture-proof and impact-resistant roll packaging method was adopted, restricting the unit weight to approx. 40 kg/roll to ensure perfect edges and zero oxidation upon arrival.

Delivery Specifications and Trade Terms

WONDERY strictly adheres to international trade execution protocols to ensure seamless and transparent supply chain fulfillment:

• Trade Term: FOB Shanghai, facilitating flexible logistics arrangements for global buyers.

• Lead Time: Full-scale precision rolling, slitting, quality inspection, and packaging were finalized within 30 days upon receipt of deposit.

• Shipping Strategy: Dispatched via centralized shipment (Partial Shipment Not Allowed) to guarantee that the entire batch arrives simultaneously, maintaining raw material homogeneity for the client's production line.