4104 Aluminum alloy,Aluminum 4104 alloy,E FORU

### **Product Introduction: Aluminum 4104 Alloy** **Overview** Aluminum 4104 Alloy is a specialized aluminum-silicon brazing alloy specifically designed for use in controlled atmosphere brazing (CAB) processes without the need for flux. This alloy contains magnesium as a key addition, which acts as a getter to disrupt the oxide layer on aluminum surfaces during brazing, enabling excellent flow and bonding characteristics in inert atmosphere furnaces. --- ### **1. Chemical Composition (Typical Weight %)** | Element | Content (%) | |---------|-------------| | **Aluminum (Al)** | Balance | | **Silicon (Si)** | 6.3 - 7.7 | | **Magnesium (Mg)** | 1.2 - 2.0 | | **Iron (Fe)** | ≤ 0.8 | | **Copper (Cu)** | ≤ 0.25 | | **Manganese (Mn)** | ≤ 0.10 | | **Zinc (Zn)** | ≤ 0.20 | | **Other Elements** | ≤ 0.05 each | | **Total Others** | ≤ 0.15 | --- ### **2. Physical Properties** | Property | Value / Description | |----------|---------------------| | **Density** | 2.68 g/cm³ | | **Melting Range** | 559 - 591 °C | | **Solidus Temperature** | 559 °C | | **Liquidus Temperature** | 591 °C | | **Electrical Conductivity** | 36-41% IACS | | **Thermal Conductivity** | 145-165 W/m·K | | **Coefficient of Thermal Expansion** | 22.0 × 10⁻⁶/°C | | **Modulus of Elasticity** | 72 GPa | --- ### **3. Mechanical Properties (As-brazed Condition)** | Property | Value Range | |----------|-------------| | **Tensile Strength** | 130-170 MPa | | **Yield Strength (0.2% Offset)** | 60-100 MPa | | **Elongation (in 50mm)** | 10-18% | | **Hardness (Brinell)** | 45-60 HB | | **Shear Strength** | 110-140 MPa | --- ### **4. International Standards** | Standard Body | Designation | |---------------|-------------| | **Aluminum Association (AA)** | AA 4104 | | **European Standard (EN)** | EN AW-4104 | | **ISO** | AlSi7Mg (ISO 18273) | | **UNS** | A94104 | | **JIS H** | A4104 | --- ### **5. Product Applications** **Controlled Atmosphere Brazing:** - Automotive heat exchangers - Radiators and cooling systems - Charge air coolers - Evaporators and condensers - HVAC system components **Fluxless Brazing Applications:** - Complex heat exchanger assemblies - Multi-circuit cooling systems - Aluminum plate heat exchangers - Microchannel heat exchangers - Precision brazed components **Industrial Applications:** - Automotive industry components - Refrigeration equipment - Aerospace heat exchangers - Industrial cooling systems - Electronic cooling devices --- ### **6. Key Characteristics & Advantages** - **Fluxless Brazing Capability**: Eliminates need for corrosive fluxes in controlled atmosphere brazing - **Excellent Oxide Disruption**: Magnesium content effectively breaks down surface oxides - **Good Flow Characteristics**: Superior wetting and spreading in nitrogen atmosphere - **Corrosion Resistance**: No flux residues to cause post-braze corrosion - **Environmental Friendly**: Eliminates flux-related environmental concerns - **Process Efficiency**: Suitable for high-volume production lines - **Consistent Performance**: Reliable results in controlled atmosphere furnaces --- ### **7. Special Features** **Brazing Mechanism:** - Magnesium vapor disrupts aluminum oxide layer - Enables direct metal-to-metal contact - Works effectively in nitrogen atmosphere - Requires specific temperature ramp rates - Optimal performance in well-controlled furnaces **Manufacturing Advantages:** - Clean, flux-free brazing process - Reduced post-braze cleaning requirements - Suitable for complex internal passages - Excellent for high-volume production - Minimal environmental impact --- ### **8. Processing Guidelines** **CAB Process Requirements:** - Brazing temperature: 590-605°C - Nitrogen atmosphere with low oxygen content (<100 ppm) - Controlled heating and cooling rates - Proper magnesium vapor containment - Adequate furnace maintenance **Joint Design Considerations:** - Optimal joint clearance: 0.05-0.20 mm - Good fit-up essential for proper capillary flow - Adequate venting for magnesium vapor - Consideration of thermal expansion differences **Quality Control:** - Visual inspection for complete flow and fillets - Leak testing for pressure-containing assemblies - Cross-section analysis for joint integrity - Corrosion testing for long-term performance **Disclaimer:** The information provided is for reference purposes only. Successful application of 4104 alloy requires proper control of brazing atmosphere, temperature profiles, and joint design. Users should conduct thorough process development and qualification for specific applications. Always follow equipment manufacturer recommendations and maintain proper safety procedures when operating controlled atmosphere brazing furnaces.

Packing of Standard Packing: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 1760 gallon liquid totes Special package is available on request.