Alclad 2024-T4, T351 Aluminum alloy,Aluminum 2024-T4, T351 alloy,E FORU

### **Alclad 2024-T4/T351 Aluminum Alloy Product Introduction** **Overview** Alclad 2024-T4/T351 is a high-strength aluminum-copper alloy that combines the excellent mechanical properties of 2024 aluminum in solution heat-treated and naturally aged condition with the superior corrosion protection of a metallurgically bonded pure aluminum cladding. The T4 and T351 tempers represent different product forms and processing routes to achieve similar mechanical properties, with the Alclad coating providing sacrificial corrosion protection for the vulnerable 2024 core. --- #### **1. Chemical Composition** **Core Material: 2024 Alloy** | 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 | **Cladding Material** - **Alloy:** 1230 or 1050 series aluminum (≥99.30% Al) - **Thickness:** Typically 2.5% to 5% of total thickness per side - **Protection Mechanism:** Sacrificial anodic protection --- #### **2. Physical Properties** | Property | Value / Description | |----------|---------------------| | **Density** | 2.78 g/cm³ (0.100 lb/in³) | | **Melting Range** | 500°C - 638°C (930°F - 1180°F) | | **Electrical Conductivity** | ~30-35% IACS | | **Thermal Conductivity** | 121 W/m·K | | **Coefficient of Thermal Expansion** | 23.2 × 10⁻⁶/°C (20-100°C) | --- #### **3. Mechanical Properties** **Typical Room Temperature Properties:** | Temper | Tensile Strength | Yield Strength | Elongation | |--------|------------------|----------------|------------| | **2024-T4** | 425-470 MPa (62-68 ksi) | 275-325 MPa (40-47 ksi) | 12-20% | | **2024-T351** | 430-475 MPa (62-69 ksi) | 280-330 MPa (41-48 ksi) | 12-18% | *Note: T351 includes stress-relieving by stretching after solution heat treatment, providing better dimensional stability for machining.* --- #### **4. International Standards** | Standard System | Designation | Product Form | |-----------------|-------------|--------------| | **AMS** | AMS 4037 | Sheet (T4) | | **AMS** | AMS 4081 | Plate (T351) | | **ASTM** | ASTM B209 | Sheet & Plate | | **MIL** | MIL-DTL-6075 | Sheet | | **EN** | EN AW-2024A [T4/T351] | Sheet/Plate | --- #### **5. Product Applications** **Aerospace & Defense:** - Aircraft fuselage skins and panels - Wing structures and components - Aircraft bulkheads and frames - Military vehicle structural components - Aerospace brackets and fittings **Transportation:** - High-performance automotive components - Racing vehicle chassis elements - Truck body panels and structures **Industrial:** - High-strength structural applications - Machinery components requiring strength-to-weight ratio - Prototype and development projects --- #### **6. Key Advantages & Considerations** **Advantages:** - ✅ **Excellent Strength-to-Weight Ratio:** Ideal for weight-critical applications - ✅ **Superior Corrosion Protection:** Alclad layer provides sacrificial protection - ✅ **Good Fatigue Resistance:** Excellent for cyclic loading applications - ✅ **Better Formability:** Compared to T3 temper, offers improved forming capabilities - ✅ **Dimensional Stability (T351):** Stress-relieved condition minimizes distortion during machining **Considerations:** - ⚠️ **Not Weldable:** Poor weldability due to hot cracking susceptibility - ⚠️ **Limited Formability in Aged Condition:** Requires careful forming operations - ⚠️ **Stress-Corrosion Cracking:** Potential susceptibility in short transverse direction - ⚠️ **Strength Reduction:** Cladding layer slightly reduces overall strength compared to bare alloy - ⚠️ **Natural Aging:** Properties continue to change slightly over time at room temperature --- **Conclusion** Alclad 2024-T4/T351 Aluminum Alloy represents an optimal balance between mechanical properties, corrosion resistance, and manufacturability for aerospace and high-performance applications. The T4 temper provides excellent strength with good formability, while the T351 temper offers enhanced dimensional stability for precision components. The Alclad coating ensures long-term durability in corrosive environments, making this material system particularly valuable for aircraft structures and other applications where reliability and service life are critical. While requiring mechanical fastening for assembly and careful attention to manufacturing processes, its proven performance history makes it a preferred choice for engineers seeking reliable high-strength aluminum solutions.

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 1535 gallon liquid totes Special package is available on request.