4043-O Aluminum alloy,Aluminum 4043-O alloy,E FORU

### **Product Introduction: Aluminum 4043-O Alloy** **Overview** Aluminum 4043-O Alloy is a non-heat-treatable aluminum-silicon alloy supplied in the annealed (O) temper condition. Primarily used as a welding filler metal, this alloy in the O temper offers maximum ductility, excellent formability, and superior feeding characteristics in welding applications. The annealed condition provides the softest state, making it ideal for applications requiring easy handling and optimal welding performance. --- ### **1. Chemical Composition (Typical Weight %)** | Element | Content (%) | |---------|-------------| | **Aluminum (Al)** | Balance | | **Silicon (Si)** | 4.5 - 6.0 | | **Iron (Fe)** | ≤ 0.8 | | **Copper (Cu)** | ≤ 0.30 | | **Manganese (Mn)** | ≤ 0.15 | | **Magnesium (Mg)** | ≤ 0.15 | | **Zinc (Zn)** | ≤ 0.20 | | **Titanium (Ti)** | ≤ 0.15 | | **Others (Each)** | ≤ 0.05 | | **Others (Total)** | ≤ 0.15 | --- ### **2. Physical Properties** | Property | Value / Description | |----------|---------------------| | **Density** | 2.69 g/cm³ | | **Melting Range** | 575 - 630 °C | | **Solidus Temperature** | 575 °C | | **Liquidus Temperature** | 630 °C | | **Electrical Conductivity** | 42-47% IACS | | **Thermal Conductivity** | 160-180 W/m·K | | **Coefficient of Thermal Expansion** | 22.5 × 10⁻⁶/°C | | **Modulus of Elasticity** | 71 GPa | --- ### **3. Mechanical Properties (O Temper Condition)** | Property | Value Range | |----------|-------------| | **Tensile Strength** | 130-170 MPa | | **Yield Strength (0.2% Offset)** | 55-95 MPa | | **Elongation (in 50mm)** | 14-22% | | **Hardness (Brinell)** | 35-50 HB | | **Shear Strength** | 90-120 MPa | | **Fatigue Strength** | 60-80 MPa | --- ### **4. International Standards** | Standard Body | Designation | |---------------|-------------| | **Aluminum Association (AA)** | AA 4043-O | | **European Standard (EN)** | EN AW-4043-O | | **ISO** | AlSi5 (ISO 18273) | | **UNS** | A94043 | | **AWS** | A5.10 ER4043 | | **ASTM** | B211 | --- ### **5. Product Applications** **Welding Applications:** - TIG welding (as rod) - MIG welding (as wire) - Repair and maintenance welding - Automotive aluminum welding - Structural aluminum fabrication - Pipe and tube welding **Base Metal Compatibility:** - 6061, 6063 series alloys - 3003, 3004 series alloys - 5052, 5086 series alloys - Most cast aluminum alloys - Various wrought aluminum alloys **Industry Applications:** - Automotive industry components - Marine and shipbuilding structures - Structural engineering applications - Pressure vessel fabrication - Heat exchanger manufacturing - General fabrication and repair --- ### **6. Key Characteristics & Advantages** - **Excellent Ductility**: Maximum formability in O temper condition - **Superior Weldability**: Excellent welding characteristics with smooth bead appearance - **Good Fluidity**: Optimal flow characteristics during welding operations - **Low Melting Point**: Easy control of welding parameters - **Reduced Hot Cracking**: Low susceptibility to solidification cracking - **Good Corrosion Resistance**: Comparable to most base metals - **Easy Handling**: Soft temper allows for easy feeding and manipulation --- ### **7. O Temper Specific Features** **Annealing Characteristics:** - Fully recrystallized microstructure - Elimination of residual stresses - Maximum ductility and softness - Uniform mechanical properties - Optimal condition for welding applications **Welding Performance:** - Smooth and stable arc characteristics - Easy slag removal - Excellent wetting action - Minimal spatter generation - Consistent deposition rates - Good bead appearance --- ### **8. Processing and Handling Guidelines** **Welding Parameters:** - Suitable for both TIG and MIG processes - Optimal with Argon or Argon/Helium shielding gases - Standard welding techniques applicable - Preheating generally not required for thin sections **Storage and Handling:** - Store in dry, controlled environments - Protect from moisture and contamination - Use clean handling procedures - Maintain proper wire spool conditions - Avoid mechanical damage to soft wire **Quality Assurance:** - Regular visual inspection for surface defects - Monitor for oxidation or contamination - Verify wire feeding performance - Conduct weld procedure qualification tests **Disclaimer:** The information provided is for reference purposes only. The O temper condition offers optimal ductility and welding performance but requires careful handling due to its soft nature. Welding results may vary depending on specific equipment, parameters, and base materials. Always conduct appropriate testing for critical applications and follow manufacturer recommendations for storage, handling, and welding procedures.

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 1753 gallon liquid totes Special package is available on request.