Alclad 2024-T42 Aluminum alloy,Aluminum 2024-T42 alloy,E FORU

### **Alclad 2024-T42 Aluminum Alloy Product Introduction** **Overview** Alclad 2024-T42 is a high-strength aluminum-copper alloy that combines the mechanical properties of solution heat-treated 2024 aluminum with the superior corrosion protection of metallurgically bonded pure aluminum cladding. The T42 temper designation indicates the material has been solution heat-treated and naturally aged by the user or processor, rather than being supplied in the heat-treated condition by the manufacturer. This provides flexibility in manufacturing processes where forming operations are required after heat treatment. --- #### **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 | | **Other Elements** | ≤ 0.15 total | **Cladding Material** - **Alloy:** 1230, 1050, or 1060 series aluminum - **Purity:** ≥99.0% aluminum content - **Coating Thickness:** Typically 1.5-5% per side of total thickness - **Protection Method:** Sacrificial cathodic protection --- #### **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** | 30-40% IACS | | **Thermal Conductivity** | 121 W/m·K (at 25°C) | | **Coefficient of Thermal Expansion** | 23.2 × 10⁻⁶/°C (20-100°C) | | **Modulus of Elasticity** | 73.1 GPa (10,600 ksi) | --- #### **3. Mechanical Properties** **Typical Mechanical Properties (After Natural Aging):** | Property | Value | |----------|-------| | **Tensile Strength** | 425-470 MPa (62-68 ksi) | | **Yield Strength (0.2% Offset)** | 255-290 MPa (37-42 ksi) | | **Elongation in 2 inches** | 12-18% | | **Shear Strength** | 255-275 MPa (37-40 ksi) | | **Fatigue Strength** | 138 MPa (20 ksi) | | **Brinell Hardness** | 105-115 HB | *Note: Properties shown are for material that has completed natural aging (typically 4-7 days after solution heat treatment).* --- #### **4. International Standards** | Standard System | Designation | Product Form | |-----------------|-------------|--------------| | **ASTM** | ASTM B209 | Sheet & Plate | | **AMS** | AMS 4037 | Sheet | | **MIL** | MIL-DTL-6075 | Sheet | | **EN** | EN AW-2024A [T42] | Sheet/Plate | | **ISO** | ISO 6361 | Wrought Products | --- #### **5. Product Applications** **Aerospace Applications:** - Aircraft fuselage panels and skins - Wing structural components - Aircraft repair and replacement parts - Aerospace brackets and fittings - Interior aircraft structures **Manufacturing Applications:** - Components requiring post-heat-treatment forming - Prototype development parts - Custom fabricated structures - Replacement parts for military equipment **Special Applications:** - Parts requiring heat treatment after cutting or preliminary forming - Custom projects needing specialized heat treatment cycles - Repair components for existing 2024 aluminum structures --- #### **6. Key Advantages & Considerations** **Advantages:** - ✅ **Post-Heat Treatment Forming Capability:** Can be formed after solution heat treatment - ✅ **Superior Corrosion Resistance:** Alclad layer provides sacrificial protection - ✅ **Excellent Strength-to-Weight Ratio:** Ideal for aerospace applications - ✅ **Controlled Aging Process:** User-controlled natural aging timeline - ✅ **Good Fatigue Performance:** Suitable for cyclic loading applications - ✅ **Manufacturing Flexibility:** Allows for complex production sequences **Considerations:** - ⚠️ **Critical Aging Timeline:** Must complete forming within specific timeframe after heat treatment - ⚠️ **Limited Weldability:** Poor welding characteristics due to hot cracking susceptibility - ⚠️ **Stress-Corrosion Cracking Potential:** Risk in short transverse direction - ⚠️ **Reduced Core Thickness:** Cladding reduces effective core material thickness - ⚠️ **Process Control Required:** Strict control of heat treatment parameters essential - ⚠️ **Storage Conditions:** Material properties affected by storage temperature and time --- **Special Processing Notes** The T42 temper is particularly valuable for applications where: - Complex forming operations must occur after solution heat treatment - Manufacturing logistics require separation of heat treatment and forming operations - Repair and maintenance operations need material in a formable yet heat-treatable condition - Custom fabrication shops require flexibility in production scheduling **Conclusion** Alclad 2024-T42 Aluminum Alloy offers a unique combination of high strength, excellent corrosion protection, and manufacturing flexibility. The T42 temper condition provides manufacturers with the ability to perform forming operations after solution heat treatment, making it particularly valuable for complex fabrication sequences and repair operations. While requiring careful process control and attention to aging timelines, this material system delivers reliable performance for demanding aerospace and industrial applications where both mechanical properties and corrosion resistance are critical requirements.

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 1536 gallon liquid totes Special package is available on request.