4145 Aluminum alloy,Aluminum 4145 alloy,E FORU

### **Product Introduction: Aluminum 4145 Alloy** **Overview** Aluminum 4145 Alloy is a high-silicon aluminum welding filler metal specifically designed for welding high-strength aluminum alloys, particularly those with high copper content. This alloy provides excellent weldability, reduced hot cracking susceptibility, and good mechanical properties in the as-welded condition, making it ideal for challenging welding applications involving 2xxx series aluminum alloys. --- ### **1. Chemical Composition (Typical Weight %)** | Element | Content (%) | |---------|-------------| | **Aluminum (Al)** | Balance | | **Silicon (Si)** | 9.3 - 10.7 | | **Copper (Cu)** | 3.3 - 4.7 | | **Iron (Fe)** | ≤ 0.8 | | **Manganese (Mn)** | ≤ 0.15 | | **Magnesium (Mg)** | ≤ 0.15 | | **Zinc (Zn)** | ≤ 0.20 | | **Chromium (Cr)** | ≤ 0.15 | | **Other Elements** | ≤ 0.05 each | | **Total Others** | ≤ 0.15 | --- ### **2. Physical Properties** | Property | Value / Description | |----------|---------------------| | **Density** | 2.75 g/cm³ | | **Melting Range** | 520 - 585 °C | | **Solidus Temperature** | 520 °C | | **Liquidus Temperature** | 585 °C | | **Electrical Conductivity** | 32-37% IACS | | **Thermal Conductivity** | 125-145 W/m·K | | **Coefficient of Thermal Expansion** | 21.2 × 10⁻⁶/°C | | **Modulus of Elasticity** | 75 GPa | --- ### **3. Mechanical Properties (As-Welded Condition)** | Property | Value Range | |----------|-------------| | **Tensile Strength** | 220-280 MPa | | **Yield Strength (0.2% Offset)** | 140-200 MPa | | **Elongation (in 50mm)** | 4-10% | | **Hardness (Brinell)** | 80-100 HB | | **Shear Strength** | 170-210 MPa | --- ### **4. International Standards** | Standard Body | Designation | |---------------|-------------| | **Aluminum Association (AA)** | AA 4145 | | **European Standard (EN)** | EN AW-4145 | | **ISO** | AlSi10Cu4 (ISO 18273) | | **UNS** | A94145 | | **AWS** | A5.10 ER4145 | --- ### **5. Product Applications** **Welding Applications:** - TIG and MIG welding of 2xxx series alloys - Aerospace component welding - Military equipment fabrication - High-strength structural welding - Repair welding of cast aluminum components **Base Metal Compatibility:** - 2014, 2024, 2219 alloys - 2030, 2048 alloys - High-copper aluminum castings - Other copper-containing aluminum alloys **Industry Applications:** - Aerospace structures - Military vehicle components - High-performance automotive parts - Structural components in defense - Specialized machinery components --- ### **6. Key Characteristics & Advantages** - **Excellent Crack Resistance**: High silicon content prevents hot cracking in high-copper alloys - **Good Strength**: Maintains high mechanical properties in welded joints - **Superior Weldability**: Specifically formulated for challenging aluminum alloys - **Reduced Porosity**: Minimal gas porosity in properly made welds - **Good Fluidity**: Excellent flow characteristics during welding - **Color Match**: Reasonable color match after anodizing - **Versatile Application**: Suitable for both TIG and MIG processes --- ### **7. Special Features** **Welding Performance:** - Stable arc in both TIG and MIG processes - Good wetting on high-copper alloys - Minimal spatter generation - Easy slag removal - Consistent bead appearance **Metallurgical Properties:** - Eutectic composition reduces cracking tendency - Compatible with high-strength base metals - Good response to post-weld heat treatment - Stable microstructure in as-welded condition --- ### **8. Processing Guidelines** **Welding Parameters:** - Suitable for TIG and MIG welding processes - Recommended shielding gas: Argon or Argon/Helium mixtures - Preheating often required (150-200°C) - Controlled interpass temperature recommended **Post-Weld Heat Treatment:** - Solution treatment: 495-505°C - Aging treatment: 150-170°C - Can improve mechanical properties - Reduces residual stresses **Quality Control:** - Dye penetrant testing for surface defects - Radiographic examination for internal defects - Mechanical testing for critical applications - Microstructural analysis for quality verification **Disclaimer:** The information provided is for reference purposes only. Welding high-strength aluminum alloys requires careful procedure development and qualification. Always conduct appropriate testing for specific applications and follow established welding procedures. The alloy is specifically designed for challenging applications involving high-copper aluminum alloys and requires proper technique and parameter control to achieve optimal results.

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 1763 gallon liquid totes Special package is available on request.