2024-T86 Aluminum alloy,Aluminum 2024-T86 alloy,E FORU

### **Aluminum 2024-T86 Alloy Product Introduction** **Overview** 2024-T86 is a high-strength aluminum-copper alloy that has undergone solution heat treatment, substantial cold working (typically 6% permanent stretch), and artificial aging to achieve maximum strength characteristics within the 2024 alloy system. This temper represents one of the strongest commercially available conditions for 2024 aluminum, offering exceptional mechanical properties for the most demanding aerospace and defense applications. --- #### **1. Chemical Composition** | Element | Content (%) | |---------|-------------| | **Aluminum (Al)** | Balance | | **Copper (Cu)** | 3.8 - 4.9 | | **Magnesium (Mg)** | 1.2 - 1.8 | | **Manganese (Mn)** | 0.30 - 0.9 | | **Iron (Fe)** | ≤ 0.20 | | **Silicon (Si)** | ≤ 0.15 | | **Zinc (Zn)** | ≤ 0.10 | | **Chromium (Cr)** | ≤ 0.10 | | **Other Elements** | ≤ 0.15 total | --- #### **2. Physical Properties** | Property | Value / Description | |----------|---------------------| | **Density** | 2.78 g/cm³ (0.100 lb/in³) | | **Melting Range** | 500°C - 638°C (932°F - 1180°F) | | **Electrical Conductivity** | 28-33% IACS | | **Thermal Conductivity** | 115-125 W/m·K | | **Coefficient of Thermal Expansion** | 23.2 × 10⁻⁶/°C (20-100°C) | | **Modulus of Elasticity** | 73.1 GPa (10,600 ksi) | | **Poisson's Ratio** | 0.33 | --- #### **3. Mechanical Properties** **Typical Mechanical Properties:** | Property | Value | |----------|-------| | **Tensile Strength** | 470-510 MPa (68-74 ksi) | | **Yield Strength (0.2% Offset)** | 400-440 MPa (58-64 ksi) | | **Elongation in 2 inches** | 5-8% | | **Shear Strength** | 285-310 MPa (41-45 ksi) | | **Fatigue Strength** | 145 MPa (21 ksi) | | **Brinell Hardness** | 135-145 HB | | **Compressive Yield Strength** | 400-440 MPa (58-64 ksi) | | **Fracture Toughness** | 22-26 MPa√m | --- #### **4. International Standards** | Standard System | Designation | Product Form | |-----------------|-------------|--------------| | **ASTM** | ASTM B209 | Plate | | **AMS** | AMS 4080 | Plate | | **AMS** | AMS 4201 | Rolled Ring | | **MIL** | MIL-DTL-6075 | Plate | | **EN** | EN AW-2024A [T86] | Plate | --- #### **5. Product Applications** **Critical Aerospace Structures:** - Aircraft lower wing skins and planks - Primary fuselage structural components - Wing spar chords and caps - Landing gear support structures - Helicopter rotor hubs and components **Defense and Space Applications:** - Military aircraft primary structures - Missile airframes and launch structures - Satellite structural components - Armored vehicle structural elements - Rocket interstage structures **High-Performance Applications:** - Racing car chassis components - Critical machined structural parts - Applications requiring maximum strength-to-weight ratio - Components subject to high compressive loads --- #### **6. Key Advantages & Considerations** **Advantages:** - ✅ **Maximum Strength Capability** in 2024 alloy series - ✅ **Superior Strength-to-Weight Ratio** - ✅ **Enhanced Fatigue Performance** - ✅ **Excellent Damage Tolerance** - ✅ **Improved Stress-Corrosion Resistance** vs T6 temper - ✅ **Superior Dimensional Stability** **Considerations:** - ⚠️ **Reduced Ductility** requires careful manufacturing planning - ⚠️ **Limited Formability** after final heat treatment - ⚠️ **Machining Challenges** require specialized tools and techniques - ⚠️ **Cost Premium** due to multiple processing steps - ⚠️ **Directional Properties** variation with grain direction - ⚠️ **Welding Not Recommended** --- **Processing Characteristics** **T86 Thermal-Mechanical Treatment:** 1. **Solution Heat Treatment:** - Temperature: 490-500°C (915-932°F) - Controlled atmosphere heating - Rapid quenching 2. **Substantial Cold Working:** - 6% permanent stretch - Precisely controlled deformation - Stress equalization 3. **Artificial Aging:** - Controlled temperature parameters - Specific time duration - Final property development --- **Quality Assurance** **Testing and Verification:** - Mechanical property testing - Ultrasonic inspection - Stress-corrosion evaluation - Microstructure analysis - Fracture toughness verification --- **Conclusion** 2024-T86 Aluminum Alloy represents the ultimate strength development in the 2024 alloy system, providing the highest mechanical properties achievable through commercial thermal-mechanical processing. The substantial cold working (6% stretch) differentiates T86 from other tempers, delivering exceptional strength characteristics essential for the most demanding aerospace applications. While the material demands sophisticated manufacturing approaches and carries a cost premium, its unparalleled performance in primary aircraft structures justifies its use where maximum strength-to-weight ratio is critical. The combination of peak strength, good fatigue resistance, and improved stress-corrosion cracking resistance makes 2024-T86 the material of choice for engineers designing critical components where structural efficiency and reliability are paramount in aerospace, defense, and high-performance applications.

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 1549 gallon liquid totes Special package is available on request.