6020-T8 Aluminum alloy,Aluminum 6020-T8 alloy,E FORU

### **Product Introduction: 6020-T8 Aluminum Alloy** **6020-T8 Aluminum Alloy** is a high-strength, heat-treatable aluminum-magnesium-silicon (Al-Mg-Si) alloy that has undergone solution heat treatment followed by cold working and artificial aging to achieve enhanced mechanical properties. The T8 temper provides superior strength, improved stress corrosion resistance, and excellent dimensional stability, making it particularly suitable for highly stressed structural components and precision applications requiring maximum strength and reliability. --- ### **1. International Standards** 6020-T8 Aluminum Alloy is recognized under the following international standards: - **AA (Aluminum Association, USA):** AA 6020, Temper T8 - **UNS (Unified Numbering System):** UNS A96020 - **ASTM:** ASTM B221 (Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, and Profiles) - **ISO (International Organization for Standardization):** AlMg1.0Si - T8 --- ### **2. Chemical Composition** The chemical composition limits (in weight percentage) are specified as follows: | Element | Content (%) | |:---------|:------------| | **Aluminum (Al)** | Balance | | **Silicon (Si)** | 0.30 - 0.7 | | **Magnesium (Mg)** | 0.50 - 1.0 | | **Manganese (Mn)** | 0.05 - 0.30 | | **Copper (Cu)** | 0.15 - 0.35 | | **Iron (Fe)** | ≤ 0.40 | | **Chromium (Cr)** | ≤ 0.15 | | **Zinc (Zn)** | ≤ 0.20 | | **Titanium (Ti)** | ≤ 0.10 | | **Lead (Pb)** | 0.05 - 0.20 | | **Bismuth (Bi)** | 0.05 - 0.20 | | **Others (each)** | ≤ 0.05 | | **Others (total)** | ≤ 0.15 | **Key Takeaway:** The strategic addition of lead and bismuth enhances machinability, while the optimized magnesium-silicon-copper composition, combined with T8 processing, enables the highest strength levels achievable with this alloy system. --- ### **3. Physical Properties** The typical physical properties of 6020-T8 aluminum alloy are: | Property | Metric Value | Imperial Value | |:----------|:-------------|:---------------| | **Density** | 2.70 g/cm³ | 0.0975 lb/in³ | | **Melting Range** | 595 - 650 °C | 1103 - 1202 °F | | **Coefficient of Thermal Expansion** | 23.2 × 10⁻⁶/°C (20-100°C) | 12.9 × 10⁻⁶/°F (68-212°F) | | **Thermal Conductivity** | 150 - 170 W/m·K | 865 - 980 BTU·in/(hr·ft²·°F) | | **Electrical Conductivity** | 38-42% IACS | 38-42% IACS | | **Modulus of Elasticity** | 70 GPa | 10,150 ksi | | **Shear Modulus** | 26.5 GPa | 3,840 ksi | | **Poisson's Ratio** | 0.33 | 0.33 | --- ### **4. Mechanical Properties (T8 Temper)** The T8 temper provides the highest strength levels for 6020 alloy: **Typical Mechanical Properties:** - **Tensile Strength:** 380 - 420 MPa (55 - 61 ksi) - **Yield Strength (0.2% Offset):** 340 - 380 MPa (49 - 55 ksi) - **Elongation (% in 50mm):** 6-10% - **Shear Strength:** 230 MPa (33 ksi) - **Compressive Yield Strength:** 330 MPa (48 ksi) - **Fatigue Strength:** 125 MPa (18 ksi) [Rotating Beam, 5×10⁸ cycles] - **Hardness (Brinell):** 110 - 120 HB - **Fracture Toughness (KIC):** 25-28 MPa√m --- ### **5. Product Applications** 6020-T8 is used in demanding applications requiring maximum strength and reliability: - **High-Strength Structural Components:** - Aerospace structural members - Defense equipment components - High-performance automotive parts - Racing vehicle components - **Precision Machinery:** - Machine tool structural elements - Robotics and automation frames - Precision equipment bases - Industrial machinery components - **Transportation Applications:** - Commercial vehicle chassis parts - Rail transport structural members - Heavy equipment components - **Special Applications:** - High-stress mechanical components - Wear-resistant applications - Components requiring dimensional stability --- ### **6. Key Characteristics & Advantages** - **Maximum Strength Properties:** The T8 temper provides the highest strength levels achievable with 6020 alloy through combined cold working and aging processes. - **Enhanced Stress Corrosion Resistance:** Superior resistance to stress corrosion cracking compared to T6 temper, particularly in highly stressed applications. - **Excellent Dimensional Stability:** Cold working provides improved stability for precision applications and minimal distortion during machining. - **Good Machinability:** Maintains good machining characteristics despite higher strength, with excellent chip formation due to lead and bismuth additions. - **Improved Fatigue Performance:** Enhanced fatigue strength resulting from cold working-induced compressive surface stresses. - **Superior Wear Resistance:** Cold worked structure provides improved surface hardness and wear characteristics. - **Good Strength-to-Weight Ratio:** One of the highest among free-machining aluminum alloys. --- ### **7. Processing Characteristics** **Heat Treatment Cycle (T8):** - Solution Heat Treatment: 525-545°C (975-1015°F) for 30-60 minutes - Quenching: Rapid water quench to room temperature - Cold Working: 4-8% permanent deformation (rolling, stretching, or drawing) - Artificial Aging: 150-170°C (300-340°F) for 8-16 hours **Machining Performance:** - **Machinability Rating:** 80-85 (compared to 2011-T3 as 100) - Requires more power for machining than T6 temper - Maintains excellent chip breakage characteristics - Good surface finish achievable with proper tooling **Forming Characteristics:** - Limited formability in T8 temper - Severe forming should be completed before final aging - Significant springback due to high yield strength - Not recommended for complex forming operations in T8 condition --- ### **8. Corrosion Performance** - **General Corrosion:** Adequate resistance for most industrial environments - **Stress Corrosion Cracking:** Excellent resistance, superior to T6 temper - **Atmospheric Corrosion:** Suitable for protected environments with proper maintenance - **Intergranular Corrosion:** Good resistance when properly processed **Protection Methods:** - Anodizing per relevant standards - Chemical conversion coatings - Powder coating and painting systems - Suitable for various industrial coating applications --- ### **9. Quality and Certification** - **Industry Compliance:** Meets ASTM and other relevant industry standards - **Quality Assurance:** Full material traceability and certification - **Testing Capabilities:** Comprehensive mechanical testing services - **Documentation:** Mill certification providing full processing history --- ### **10. Comparative Advantages** **vs. 6020-T6:** - Higher strength and hardness - Better stress corrosion cracking resistance - Improved dimensional stability - Enhanced fatigue performance **vs. 2011-T8:** - Better corrosion resistance - Superior stress corrosion cracking resistance - Good compromise for applications requiring both strength and corrosion resistance **vs. 6262-T8:** - Comparable strength levels - Better machinability characteristics - Similar mechanical properties with enhanced manufacturing benefits --- ### **Summary** **6020-T8 Aluminum Alloy** represents the peak strength condition for the 6020 alloy system, offering an exceptional combination of high mechanical properties, good machinability, and improved stress corrosion resistance. The T8 temper process, incorporating controlled cold working after solution heat treatment, produces a material ideally suited for highly stressed structural applications where maximum strength, dimensional stability, and reliability are paramount requirements. While offering reduced formability compared to softer tempers, 6020-T8 provides superior strength characteristics for applications in aerospace, defense, and high-performance industrial sectors where both mechanical performance and manufacturing efficiency are critical.

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 1967 gallon liquid totes Special package is available on request.