4021 Aluminum alloy,Aluminum 4021 alloy,E FORU

### **Product Introduction: Aluminum 4021 Alloy** **Overview** Aluminum 4021 Alloy is a high-performance aluminum-silicon casting alloy specifically designed for applications requiring excellent mechanical properties at elevated temperatures, superior wear resistance, and good corrosion resistance. This heat-treatable alloy is particularly valued in automotive, aerospace, and high-performance industrial applications for its outstanding combination of high-temperature stability, strength, and castability. --- ### **1. Chemical Composition (Typical Weight %)** | Element | Content (%) | |---------|-------------| | **Aluminum (Al)** | Balance | | **Silicon (Si)** | 11.0 - 13.0 | | **Copper (Cu)** | 0.8 - 1.3 | | **Magnesium (Mg)** | 0.8 - 1.3 | | **Iron (Fe)** | ≤ 0.15 | | **Manganese (Mn)** | 0.10 - 0.30 | | **Nickel (Ni)** | 0.8 - 1.3 | | **Zinc (Zn)** | ≤ 0.10 | | **Titanium (Ti)** | 0.10 - 0.20 | | **Others (Each)** | ≤ 0.05 | | **Others (Total)** | ≤ 0.15 | --- ### **2. Physical Properties** | Property | Value / Description | |----------|---------------------| | **Density** | 2.68 g/cm³ | | **Melting Range** | 505 - 580 °C | | **Electrical Conductivity** | 28-33% IACS | | **Thermal Conductivity** | 115-135 W/m·K | | **Coefficient of Thermal Expansion** | 19.8 × 10⁻⁶/°C | | **Modulus of Elasticity** | 76 GPa | | **Specific Heat Capacity** | 0.95 J/g·°C | --- ### **3. Mechanical Properties (by Temper Condition)** | Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | |--------|------------------------|----------------------|----------------| | **F (As-cast)** | 190-230 | 140-180 | 1-2 | | **T5** | 260-300 | 220-260 | 1-2 | | **T6** | 320-360 | 280-320 | 1-3 | | **T7** | 290-330 | 250-290 | 2-4 | --- ### **4. International Standards** | Standard Body | Designation | |---------------|-------------| | **Aluminum Association (AA)** | AA 4021 | | **European Standard (EN)** | EN AW-4021 | | **ISO** | AlSi12Cu1MgNi | | **UNS** | A94021 | | **JIS H** | A4021 | --- ### **5. Product Applications** **Automotive Industry:** - High-performance engine pistons - Cylinder heads for turbocharged engines - Engine blocks for racing applications - Turbocharger housings - High-temperature engine components **Aerospace Applications:** - Aircraft piston engine components - Missile and rocket parts - Satellite structural components - Aircraft brake system components - Jet engine accessories **Industrial Applications:** - High-temperature pump bodies - Compressor components for hot gases - Industrial furnace parts - Die-casting machine components - High-wear machinery parts **Specialized Applications:** - Racing engine components - High-performance automotive parts - Nuclear industry components - Defense equipment parts - Specialized tooling components --- ### **6. Key Characteristics & Advantages** - **Excellent High-Temperature Strength**: Maintains mechanical properties at temperatures up to 300°C - **Superior Wear Resistance**: Outstanding performance in abrasive environments - **Good Thermal Stability**: Minimal dimensional changes under thermal cycling - **Excellent Castability**: Superior fluidity with reduced hot tearing tendency - **Good Corrosion Resistance**: Adequate for most industrial environments - **Excellent Heat Treatability**: Responsive to solution treatment and aging processes - **Low Thermal Expansion**: Good dimensional stability under temperature variations --- ### **7. Special Features** **High-Temperature Performance:** - Stable microstructure at elevated temperatures - Excellent creep resistance - Good thermal fatigue properties - Minimal property degradation after prolonged high-temperature exposure **Enhanced Mechanical Properties:** - High hardness and wear resistance - Good fatigue strength under dynamic loading - Excellent pressure tightness - Superior dimensional stability **Manufacturing Advantages:** - Suitable for sand casting and permanent mold processes - Good response to modification treatments - Predictable solidification characteristics - Excellent surface finish in as-cast condition - Good machinability after heat treatment --- ### **8. Quality and Performance Standards** - Meets automotive and aerospace quality requirements - Suitable for high-temperature structural applications - Consistent performance in volume production - Good impact resistance at elevated temperatures - Reliable for safety-critical high-temperature components **Disclaimer:** The information provided is for reference purposes only. Specific properties may vary depending on casting methods, section thickness, heat treatment parameters, and foundry practices. For critical applications, especially those involving high temperatures, consult technical data sheets from material suppliers and conduct appropriate testing. Mechanical properties at elevated temperatures are particularly dependent on exposure time and temperature conditions.

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 1745 gallon liquid totes Special package is available on request.