4145A Aluminum alloy,Aluminum 4145A alloy,E FORU

### **Product Introduction: Aluminum 4145A Alloy** **Overview** Aluminum 4145A Alloy is an enhanced version of the standard 4145 aluminum-silicon-copper welding filler metal, featuring tighter composition controls and improved consistency for high-integrity welding applications. This specialized alloy is designed for welding high-strength aluminum alloys, particularly those with significant copper content, offering superior performance in critical aerospace, defense, and automotive applications. --- ### **1. Chemical Composition (Typical Weight %)** | Element | Content (%) | |---------|-------------| | **Aluminum (Al)** | Balance | | **Silicon (Si)** | 9.5 - 10.5 | | **Copper (Cu)** | 3.5 - 4.5 | | **Iron (Fe)** | ≤ 0.5 | | **Manganese (Mn)** | ≤ 0.10 | | **Magnesium (Mg)** | ≤ 0.10 | | **Zinc (Zn)** | ≤ 0.15 | | **Titanium (Ti)** | 0.05 - 0.15 | | **Other Elements** | ≤ 0.03 each | | **Total Others** | ≤ 0.10 | --- ### **2. Physical Properties** | Property | Value / Description | |----------|---------------------| | **Density** | 2.75 g/cm³ | | **Melting Range** | 522 - 582 °C | | **Solidus Temperature** | 522 °C | | **Liquidus Temperature** | 582 °C | | **Electrical Conductivity** | 33-38% IACS | | **Thermal Conductivity** | 128-148 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** | 230-290 MPa | | **Yield Strength (0.2% Offset)** | 150-210 MPa | | **Elongation (in 50mm)** | 5-12% | | **Hardness (Brinell)** | 85-105 HB | | **Shear Strength** | 175-215 MPa | | **Fatigue Strength** | 95-115 MPa | --- ### **4. International Standards** | Standard Body | Designation | |---------------|-------------| | **Aluminum Association (AA)** | AA 4145A | | **European Standard (EN)** | EN AW-4145A | | **ISO** | AlSi10Cu4 (ISO 18273) | | **UNS** | A94145 | | **AWS** | A5.10 ER4145 | | **AMS** | 4158 | --- ### **5. Product Applications** **High-Performance Welding Applications:** - Aerospace structural components - Military aircraft structures - Missile and defense systems - Space vehicle components - Racing automotive frames **Critical Industry Applications:** - Nuclear industry components - Defense vehicle structures - High-performance machinery - Pressure vessel fabrication - Structural components in extreme environments **Base Metal Compatibility:** - 2014, 2024, 2219 aerospace alloys - High-strength 2xxx series alloys - Aluminum-copper casting alloys - Other copper-containing aluminum alloys --- ### **6. Key Characteristics & Advantages** - **Enhanced Consistency**: Tighter composition controls for reliable performance - **Superior Crack Resistance**: Optimized silicon content for maximum hot cracking resistance - **Improved Weld Quality**: Reduced porosity and inclusion content - **Excellent Mechanical Properties**: High strength maintenance in welded joints - **Better Arc Stability**: Consistent welding performance - **Quality Assurance**: Meets stringent aerospace and defense standards - **Reduced Variability**: Improved batch-to-batch consistency --- ### **7. Special Features of 4145A Variant** **Quality Enhancements:** - Reduced iron content for improved ductility - Titanium addition for grain refinement - Tighter control of copper and silicon ratios - Lower impurity levels - Enhanced surface quality on wire products **Performance Benefits:** - More consistent weld bead appearance - Reduced spatter in welding operations - Improved wetting characteristics - Better fatigue performance in welded joints - Enhanced corrosion resistance --- ### **8. Processing Guidelines** **Welding Parameters:** - Strict parameter control required - Recommended shielding gas: High-purity Argon - Preheating: 150-200°C for thick sections - Interpass temperature control essential **Quality Control Requirements:** - Certified material traceability - Regular chemical analysis verification - Surface quality inspections - Welding procedure qualifications - Comprehensive documentation **Post-Weld Treatment:** - Solution treatment: 495-505°C - Artificial aging: 155-165°C - Stress relief when required - Non-destructive testing mandatory **Disclaimer:** The information provided is for reference purposes only. The 4145A variant is designed for critical applications requiring the highest level of quality and consistency. Users must implement strict quality control procedures and conduct thorough welding procedure qualifications. Always adhere to applicable industry standards and customer-specific requirements for aerospace, defense, and other high-reliability applications.

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 1764 gallon liquid totes Special package is available on request.