6020-T651 Aluminum alloy,Aluminum 6020-T651 alloy,E FORU

### **Product Introduction: 6020-T651 Aluminum Alloy** **6020-T651 Aluminum Alloy** is a high-strength, heat-treatable aluminum-magnesium-silicon (Al-Mg-Si) alloy known for its excellent combination of mechanical properties and good machinability. The T651 temper indicates the material has been solution heat-treated, stress-relieved by stretching, and artificially aged to achieve optimal strength characteristics with minimal internal stress, making it particularly suitable for precision-machined components and structural applications. --- ### **1. International Standards** 6020-T651 Aluminum Alloy is recognized under the following international standards: - **AA (Aluminum Association, USA):** AA 6020, Temper T651 - **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 --- ### **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 significantly enhances machinability, while the balanced magnesium-silicon-copper composition provides excellent age-hardening response and mechanical strength. --- ### **3. Physical Properties** The typical physical properties of 6020-T651 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** | 23.4 × 10⁻⁶/°C (20-100°C) | 13.0 × 10⁻⁶/°F (68-212°F) | | **Thermal Conductivity** | 155 - 175 W/m·K | 895 - 1010 BTU·in/(hr·ft²·°F) | | **Electrical Conductivity** | 40-45% IACS | 40-45% IACS | | **Modulus of Elasticity** | 69 GPa | 10,000 ksi | | **Shear Modulus** | 26 GPa | 3,770 ksi | | **Poisson's Ratio** | 0.33 | 0.33 | --- ### **4. Mechanical Properties (T651 Temper)** The T651 temper provides stable, high-strength properties ideal for machining: **Typical Mechanical Properties:** - **Tensile Strength:** 350 - 390 MPa (51 - 57 ksi) - **Yield Strength (0.2% Offset):** 310 - 350 MPa (45 - 51 ksi) - **Elongation (% in 50mm):** 8-12% - **Shear Strength:** 205 MPa (30 ksi) - **Fatigue Strength:** 115 MPa (17 ksi) [Rotating Beam, 5×10⁸ cycles] - **Hardness (Brinell):** 100 - 110 HB (500 kg load, 10 mm ball) - **Bearing Strength:** 550 MPa (80 ksi) [e/D=2.0] --- ### **5. Product Applications** 6020-T651 is primarily used in applications requiring high strength and excellent machinability: - **Precision Machined Components:** - Automotive engine components - Transmission parts - Pump bodies and housings - Valve components - Hydraulic system parts - **Structural Applications:** - Machine tool components - Industrial equipment frames - Robotics and automation components - Material handling equipment - **Transportation Industry:** - Commercial vehicle components - Rail transport parts - Marine equipment components - **General Manufacturing:** - Screw machine products - Complex geometrical parts - High-volume production components --- ### **6. Key Characteristics & Advantages** - **Excellent Machinability:** Superior free-machining characteristics with excellent chip formation and good surface finish, comparable to other lead-bearing aluminum alloys. - **High Strength-to-Weight Ratio:** Provides excellent mechanical properties combined with lightweight characteristics. - **Good Stress Relief:** The T651 temper ensures minimal distortion during machining operations due to effective stress relief through stretching. - **Good Fatigue Performance:** Demonstrated excellent fatigue resistance for mechanical and structural applications. - **Adequate Corrosion Resistance:** Maintains reasonable corrosion resistance for most industrial applications. - **Stable Mechanical Properties:** Consistent performance in precision machining applications. - **Good Anodizing Response:** Can be anodized for improved surface properties and corrosion resistance. --- ### **7. Processing Characteristics** **Heat Treatment Cycle (T651):** - Solution Heat Treatment: 525-545°C (975-1015°F) - Quenching: Rapid water quench - Stress Relieving: Stretched 1.5-3% permanent set - Artificial Aging: 150-170°C (300-340°F) for 8-12 hours **Machining Performance:** - **Machinability Rating:** 85-90 (compared to 2011-T3 as 100) - Excellent chip breakage characteristics - Suitable for high-speed machining operations - Good tool life and surface finish **Forming Characteristics:** - Limited formability in T651 temper - Best formed in annealed (O) condition - Significant springback due to high yield strength - Not recommended for severe forming operations --- ### **8. Corrosion Performance** - **General Corrosion:** Adequate resistance for most industrial environments - **Stress Corrosion Cracking:** Good resistance in properly aged condition - **Atmospheric Corrosion:** Suitable for protected environments - **Chemical Resistance:** Good resistance to many industrial chemicals **Protection Methods:** - Sulfuric acid anodizing - Chemical conversion coating - Powder coating and painting - Suitable for various surface treatment processes --- ### **9. Quality and Certification** - **Industry Compliance:** Meets ASTM and other relevant industry standards - **Quality Assurance:** Full material traceability available - **Testing Capabilities:** Standard mechanical testing and inspection services - **Certification:** Mill certification available for all shipments --- ### **10. Safety and Environmental Considerations** **Material Safety:** - Contains lead and bismuth - proper handling procedures required - Adequate ventilation needed during machining operations - Chip disposal should follow environmental regulations **Environmental Compliance:** - Lead-free alternatives available for restricted applications - Recycling requires special handling procedures - Compliance with RoHS regulations should be verified for specific applications --- ### **Summary** **6020-T651 Aluminum Alloy** represents a high-performance free-machining aluminum alloy that delivers an exceptional combination of strength, machinability, and dimensional stability. The T651 temper provides optimal conditions for precision machining of complex components, making it particularly valuable for automotive, industrial, and general manufacturing applications where both mechanical performance and manufacturing efficiency are critical requirements. Its balanced properties make it an excellent choice for high-volume production of precision parts requiring reliable performance and consistent quality.

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 1966 gallon liquid totes Special package is available on request.