4943 Aluminum alloy,Aluminum 4943 alloy,E FORU

### **Product Introduction: Aluminum 4943 Alloy** **Overview** Aluminum 4943 Alloy is an advanced aluminum-silicon welding filler metal developed as an enhanced alternative to traditional 4043 alloy. With higher silicon content and improved chemistry control, it offers superior mechanical properties, better fluidity, and enhanced performance characteristics for demanding welding applications, particularly in structural and high-strength components. --- ### **1. Chemical Composition (Typical Weight %)** | Element | Content (%) | |---------|-------------| | **Aluminum (Al)** | Balance | | **Silicon (Si)** | 6.3 - 7.7 | | **Iron (Fe)** | ≤ 0.8 | | **Copper (Cu)** | ≤ 0.25 | | **Manganese (Mn)** | ≤ 0.15 | | **Magnesium (Mg)** | ≤ 0.10 | | **Zinc (Zn)** | ≤ 0.20 | | **Titanium (Ti)** | ≤ 0.15 | | **Other Elements** | ≤ 0.05 each | | **Total Others** | ≤ 0.15 | --- ### **2. Physical Properties** | Property | Value / Description | |----------|---------------------| | **Density** | 2.68 g/cm³ | | **Melting Range** | 574 - 610 °C | | **Solidus Temperature** | 574 °C | | **Liquidus Temperature** | 610 °C | | **Electrical Conductivity** | 38-43% IACS | | **Thermal Conductivity** | 155-175 W/m·K | | **Coefficient of Thermal Expansion** | 21.8 × 10⁻⁶/°C | | **Modulus of Elasticity** | 73 GPa | --- ### **3. Mechanical Properties (As-Welded Condition)** | Property | Value Range | |----------|-------------| | **Tensile Strength** | 185-225 MPa | | **Yield Strength (0.2% Offset)** | 105-145 MPa | | **Elongation (in 50mm)** | 8-15% | | **Hardness (Brinell)** | 60-75 HB | | **Shear Strength** | 140-170 MPa | | **Fatigue Strength** | 85-105 MPa | --- ### **4. International Standards** | Standard Body | Designation | |---------------|-------------| | **Aluminum Association (AA)** | AA 4943 | | **European Standard (EN)** | EN AW-4943 | | **ISO** | AlSi7 (ISO 18273) | | **UNS** | A94943 | | **AWS** | A5.10 ER4943 | --- ### **5. Product Applications** **Structural Welding Applications:** - Bridge and building structures - Marine and shipbuilding structures - Heavy equipment manufacturing - Transportation infrastructure - Architectural frameworks **High-Strength Applications:** - Military vehicle structures - Aerospace components - Racing automotive frames - High-performance bicycle frames - Structural members in extreme environments **General Welding Applications:** - 6xxx series aluminum alloys - 5xxx series aluminum alloys - Cast aluminum components - Repair and maintenance welding - Fabrication of thick sections --- ### **6. Key Characteristics & Advantages** - **Higher Strength**: Approximately 20% stronger than 4043 alloy in as-welded condition - **Improved Fluidity**: Better flow characteristics for superior weld appearance - **Reduced Hot Cracking**: Enhanced resistance to solidification cracking - **Better Color Match**: Excellent anodizing match with 6xxx series base metals - **Increased Ductility**: Improved elongation compared to traditional filler metals - **Superior Fatigue Performance**: Better resistance to cyclic loading - **Enhanced Weld Quality**: Reduced porosity and improved bead contour --- ### **7. Special Features** **Welding Performance:** - Smoother arc characteristics - Reduced spatter generation - Excellent bead profile - Easy slag removal - Consistent deposition rates **Mechanical Advantages:** - Higher yield and tensile strength - Improved toughness - Better performance in thick sections - Enhanced properties in multi-pass welds - Superior performance in stress-critical applications --- ### **8. Processing Guidelines** **Welding Parameters:** - Suitable for both TIG and MIG processes - Recommended shielding gas: Argon or Argon/Helium mixtures - Can use same parameters as 4043 but with improved results - Preheating beneficial for sections over 25mm thickness **Quality Control:** - Visual inspection for weld appearance - Dye penetrant testing for surface defects - Radiographic examination for internal quality - Mechanical testing for critical applications **Best Practices:** - Proper joint preparation essential - Maintain consistent travel speed - Use appropriate gas flow rates - Store wire in dry conditions **Disclaimer:** The information provided is for reference purposes only. While 4943 alloy offers improved performance characteristics over traditional 4043, users should conduct appropriate testing and procedure qualifications for their specific applications. The alloy is particularly beneficial for structural applications where higher strength and improved fatigue performance are required. Always follow manufacturer recommendations and applicable industry standards for welding procedures and quality control.

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 1768 gallon liquid totes Special package is available on request.