Alclad 2024-T72 Aluminum alloy,Aluminum 2024-T72 alloy,E FORU

### **Alclad 2024-T72 Aluminum Alloy Product Introduction** **Overview** Alclad 2024-T72 is a specialized aluminum-copper alloy that combines the fundamental strength characteristics of 2024 aluminum with optimized resistance to stress-corrosion cracking (SCC) through a specific artificial aging treatment. The T72 temper designation indicates the material has been solution heat-treated and then artificially averaged to provide the best possible SCC resistance among the 2024 temper variants, while the Alclad coating ensures superior corrosion protection. This makes it particularly valuable for applications where both strength and long-term environmental durability are critical. --- #### **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** | 33-38% 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:** | Property | Value | |----------|-------| | **Tensile Strength** | 415-455 MPa (60-66 ksi) | | **Yield Strength (0.2% Offset)** | 275-310 MPa (40-45 ksi) | | **Elongation in 2 inches** | 10-15% | | **Shear Strength** | 255-275 MPa (37-40 ksi) | | **Fatigue Strength** | 124 MPa (18 ksi) | | **Brinell Hardness** | 100-110 HB | *Note: The T72 temper provides slightly lower strength but significantly improved stress-corrosion cracking resistance compared to T6 or T62 tempers.* --- #### **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 [T72] | Sheet/Plate | | **ISO** | ISO 6361 | Wrought Products | --- #### **5. Product Applications** **Aerospace Applications:** - Aircraft structural components in corrosive environments - Wing and fuselage panels for marine-based aircraft - Components with sustained tensile stresses - Aircraft parts exposed to marine atmospheres **Marine and Offshore:** - Naval aircraft components - Offshore platform structures - Marine vessel components - Coastal installation structures **Special Applications:** - Components requiring maximum SCC resistance - Structures with high residual stresses - Applications where reliability is paramount - Critical components in corrosive environments --- #### **6. Key Advantages & Considerations** **Advantages:** - ✅ **Excellent Stress-Corrosion Cracking Resistance:** Superior SCC resistance among 2024 tempers - ✅ **Enhanced Corrosion Protection:** Combined Alclad and temper protection - ✅ **Good Strength Retention:** Maintains useful strength while optimizing SCC resistance - ✅ **Improved Service Life:** Extended component life in corrosive environments - ✅ **Predictable Performance:** Stable, averaged microstructure - ✅ **Reduced Maintenance:** Lower risk of stress-corrosion failures **Considerations:** - ⚠️ **Reduced Strength:** Lower mechanical properties than T6 or T62 tempers - ⚠️ **Limited Weldability:** Poor welding characteristics - ⚠️ **Specialized Application:** Not suitable for maximum strength applications - ⚠️ **Processing Cost:** Additional heat treatment adds to manufacturing cost - ⚠️ **Cladding Limitations:** Reduced effective core thickness --- **Heat Treatment Characteristics** The T72 temper involves: - Solution heat treatment at 490-500°C (915-932°F) - Rapid quenching - Artificial aging at specific temperatures and times to produce an averaged microstructure - Controlled cooling process **Stress-Corrosion Performance:** - Excellent resistance to stress-corrosion cracking in all directions - Stable microstructure resistant to SCC initiation - Suitable for applications with sustained tensile stresses - Proven performance in marine and industrial environments **Conclusion** Alclad 2024-T72 Aluminum Alloy represents a carefully engineered compromise between mechanical strength and environmental durability. The T72 temper provides the highest available resistance to stress-corrosion cracking in the 2024 alloy system, making it the preferred choice for applications where component reliability in corrosive environments outweighs the need for maximum strength. Combined with the proven protection of Alclad coating, this material offers exceptional long-term performance for aerospace, marine, and industrial applications where stress-corrosion failures could have severe consequences. Its specialized nature makes it particularly valuable for critical components operating in demanding environmental conditions.

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 1538 gallon liquid totes Special package is available on request.