2024-T361 Aluminum alloy,Aluminum 2024-T361 alloy,E FORU

### **Aluminum 2024-T361 Alloy Product Introduction** **Overview** Aluminum 2024-T361 is a high-strength aluminum-copper alloy that has undergone a specific thermal-mechanical treatment process. The T361 temper designation indicates the material has been solution heat-treated, then cold worked by a specific percentage (typically 6% permanent set) to achieve enhanced mechanical properties. This temper offers improved strength characteristics over standard T3 tempers while maintaining good damage tolerance, making it suitable for critical aerospace structural 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** | 121 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** | 460-500 MPa (67-73 ksi) | | **Yield Strength (0.2% Offset)** | 345-380 MPa (50-55 ksi) | | **Elongation in 2 inches** | 8-12% | | **Shear Strength** | 270-290 MPa (39-42 ksi) | | **Fatigue Strength** | 145 MPa (21 ksi) | | **Brinell Hardness** | 130-140 HB | | **Compressive Yield Strength** | 345-380 MPa (50-55 ksi) | | **Bearing Strength** | 690-760 MPa (100-110 ksi) | --- #### **4. International Standards** | Standard System | Designation | Product Form | |-----------------|-------------|--------------| | **ASTM** | ASTM B209 | Sheet & Plate | | **AMS** | AMS 4037 | Sheet | | **AMS** | AMS 4080 | Plate | | **MIL** | MIL-DTL-6075 | Sheet | | **EN** | EN AW-2024A [T361] | Sheet/Plate | --- #### **5. Product Applications** **Primary Aerospace Applications:** - Aircraft wing skins and covers - Fuselage structural components - Bulkheads and frames - Stringers and longerons - Aircraft landing gear components **Defense Applications:** - Military aircraft structural members - Missile body sections - Armored vehicle components - Military transport equipment **Special Applications:** - High-performance automotive components - Racing vehicle structural parts - Critical machined aerospace components - Structural elements requiring enhanced strength --- #### **6. Key Advantages & Considerations** **Advantages:** - ✅ **Enhanced Strength Properties:** Higher strength than standard T3 temper - ✅ **Improved Fatigue Performance:** Better resistance to cyclic loading - ✅ **Good Damage Tolerance:** Maintains adequate fracture toughness - ✅ **Dimensional Stability:** Cold working provides stable mechanical properties - ✅ **Good Machinability:** Suitable for precision machining operations - ✅ **Proven Aerospace Performance:** Established track record in aviation **Considerations:** - ⚠️ **Reduced Formability:** Limited capability for post-treatment forming - ⚠️ **Corrosion Sensitivity:** Requires protective coatings for harsh environments - ⠠ **Welding Limitations:** Not recommended for fusion welding - ⚠️ **Stress-Corrosion Cracking:** Potential susceptibility in short transverse direction - ⚠️ **Specialized Processing:** Requires controlled manufacturing conditions - ⚠️ **Cost Considerations:** Higher cost than standard tempers --- **Processing Characteristics** **T361 Temper Process:** 1. Solution heat treatment at 490-500°C (915-932°F) 2. Rapid quenching to room temperature 3. Controlled cold working (6% permanent set) 4. Natural aging to stable condition **Manufacturing Notes:** - Cold working is precisely controlled to achieve 6% permanent set - Properties stabilize through natural aging over 4-7 days - Material exhibits consistent mechanical properties - Suitable for high-precision machining operations --- **Quality Assurance** **Testing Requirements:** - Mechanical property verification - Ultrasonic inspection for internal quality - Grain structure examination - Corrosion resistance testing - Fatigue performance validation --- **Conclusion** Aluminum 2024-T361 represents an optimized version of the classic 2024 alloy, offering enhanced mechanical properties through controlled cold working. The specific 6% permanent set in the T361 temper provides improved strength characteristics while maintaining the excellent damage tolerance and fatigue resistance that make 2024 alloy indispensable in aerospace applications. While requiring careful attention to corrosion protection and manufacturing limitations, this temper offers a valuable balance of properties for critical structural components where enhanced strength and reliability are paramount. Its proven performance in demanding aerospace environments makes it a trusted choice for engineers designing primary aircraft structures and other 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 1543 gallon liquid totes Special package is available on request.