6660 Aluminum alloy,Aluminum 6660 alloy，E FORU

### **Aluminum 6660 Alloy (EN AW-6660) - Product Introduction** **Aluminum 6660** is a heat-treatable aluminum-magnesium-silicon alloy designed for superior extrudability and excellent mechanical properties. This alloy belongs to the 6xxx series and offers an optimal balance of high strength, good corrosion resistance, and excellent surface quality, making it particularly suitable for demanding structural and architectural applications. --- #### **1. Chemical Composition** The chemical composition is carefully balanced to achieve optimal mechanical properties and extrudability: | Element | Content (%) (Typical) | Standard Range (EN 573-3) | |---|---|---| | **Aluminum (Al)** | Balance | Balance | | **Magnesium (Mg)** | 0.8 - 1.2 | 0.8 - 1.2 | | **Silicon (Si)** | 0.7 - 1.1 | 0.7 - 1.1 | | **Iron (Fe)** | ≤ 0.30 | ≤ 0.30 | | **Copper (Cu)** | 0.15 - 0.35 | 0.15 - 0.35 | | **Manganese (Mn)** | 0.10 - 0.40 | 0.10 - 0.40 | | **Chromium (Cr)** | 0.10 - 0.30 | 0.10 - 0.30 | | **Zinc (Zn)** | ≤ 0.15 | ≤ 0.15 | | **Titanium (Ti)** | ≤ 0.10 | ≤ 0.10 | | **Others (Each)** | ≤ 0.05 | ≤ 0.05 | | **Others (Total)** | ≤ 0.15 | ≤ 0.15 | *The optimized Mg/Si ratio combined with controlled copper content provides enhanced strength characteristics.* --- #### **2. Physical Properties** Aluminum 6660 exhibits excellent physical properties for structural applications: | Property | Metric Value | Imperial Value | |---|---|---| | **Density** | 2.71 g/cm³ | 0.0979 lb/in³ | | **Melting Range** | 580 - 650 °C | 1076 - 1202 °F | | **Electrical Conductivity** | 40-44 % IACS (T6 Temper) | 40-44 % IACS | | **Thermal Conductivity** | 165-180 W/m·K | 1145-1250 BTU·in/(hr·ft²·°F) | | **Coefficient of Thermal Expansion** | 23.5 × 10⁻⁶/K | 13.1 × 10⁻⁶/°F | | **Modulus of Elasticity** | 69 GPa | 10,000 ksi | | **Shear Modulus** | 26 GPa | 3,770 ksi | --- #### **3. Mechanical Properties** Typical mechanical properties for common tempers: | Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) | |---|---|---|---|---| | **T4** | 230-270 | 130-170 | 15-19 | 70-80 | | **T5** | 270-310 | 230-270 | 12-16 | 85-95 | | **T6** | 300-340 | 270-310 | 10-14 | 95-105 | | **T651** | 310-350 | 280-320 | 9-13 | 100-110 | --- #### **4. International Standards** Aluminum 6660 complies with the following international standards: * **European Standard (EN):** **EN AW-6660** (Material Number 3.3225) * **ISO:** **AlMgSiCu** under ISO 209 * **EN 755:** Aluminum and aluminum alloy extruded rod/bar, tube and profiles * **EN 13957:** Aluminum and aluminum alloys - Extruded round, coiled and drawn wire * **EN 12020:** Aluminum and aluminum alloys - Extruded precision profiles * **EN 15088:** Aluminum and aluminum alloys - Structural products for construction works * **ASTM:** **ASTM B221** for Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes * **National Equivalents:** DIN 3.3225 (Germany), BS (UK) --- #### **5. Product Applications** Aluminum 6660 is used in high-strength structural applications: * **Heavy Structural Components:** Building frameworks and support structures * **Transportation Systems:** Railway car body sections, truck chassis components * **Marine Structures:** Ship building components, offshore structures * **Bridge Components:** Structural elements for bridges and walkways * **Industrial Machinery:** Heavy equipment frames and structural supports * **Aerospace Components:** Non-critical aircraft structural parts * **Defense Applications:** Military vehicle components and structures * **Architectural Systems:** High-strength curtain wall systems and mullions --- #### **6. Key Advantages & Characteristics** * **High Strength Properties:** Superior mechanical strength among 6xxx series alloys * **Excellent Extrudability:** Good for complex profiles despite high strength * **Good Toughness:** Balanced combination of strength and ductility * **Corrosion Resistance:** Good resistance to atmospheric corrosion * **Weldability:** Can be welded using proper procedures and filler materials * **Fatigue Resistance:** Excellent performance under cyclic loading conditions * **Anodizing Response:** Suitable for protective surface treatments * **Thermal Stability:** Maintains properties at elevated temperatures * **Machinability:** Good machining characteristics in aged tempers **Heat Treatment Characteristics:** - Solution heat treatment: 520-540°C (968-1004°F) - Artificial aging: 160-180°C (320-356°F) for 6-10 hours - Good response to precipitation hardening - Stable mechanical properties after aging **Fabrication Properties:** - Moderate bendability in T4 temper - Good machinability with carbide tools - Weldable using GTAW and GMAW processes - Suitable for various joining methods **Structural Performance:** - High strength-to-weight ratio - Good impact resistance - Excellent load-bearing capacity - Suitable for safety-critical applications --- **Quality Assurance:** - Strict composition control - Comprehensive mechanical testing - Surface quality inspection - Certified material traceability **Conclusion:** Aluminum 6660 represents a high-strength variant in the 6xxx series aluminum alloys, offering exceptional mechanical properties combined with good manufacturing characteristics. Its compliance with international standards and suitability for demanding structural applications make it an ideal choice for engineers and designers working on high-performance components in transportation, construction, and industrial sectors. The alloy's superior strength characteristics, combined with aluminum's inherent advantages of light weight and corrosion resistance, position it as a premium material for applications where structural performance is paramount.

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 2090 gallon liquid totes Special package is available on request.