2048-T851 Aluminum alloy,Aluminum 2048-T851 alloy,E FORU

### **Product Datasheet: 2048-T851 Aluminum Alloy** --- #### **1. Overview** 2048-T851 is a high‑strength aluminum‑copper‑magnesium alloy supplied in the T851 temper (solution heat‑treated, stress‑relieved, and artificially aged). It offers an excellent combination of strength, fatigue resistance, and fracture toughness, particularly in thick sections. This alloy is widely used in aerospace structures where damage tolerance and reliability under cyclic loading are critical. --- #### **2. International Standards** - **UNS**: UNS A92048 - **ASTM**: ASTM B247M (Standard Specification for Aluminum and Aluminum-Alloy Die Forgings, Hand Forgings, and Rolled Ring Forgings) - **AMS**: AMS 4251 (Aerospace Material Specification) - **AA (Aluminum Association)**: AA 2048 - **EN Standards**: EN 586-2 (Forgings) and EN 485-2 (Sheet/Plate) --- #### **3. Chemical Composition (Weight %)** | Element | Content (%) | |---------|-------------| | **Aluminum (Al)** | Balance | | **Copper (Cu)** | 2.8–3.8 | | **Magnesium (Mg)** | 1.2–1.8 | | **Manganese (Mn)** | 0.20–0.6 | | **Iron (Fe)** | ≤ 0.20 | | **Silicon (Si)** | ≤ 0.15 | | **Zinc (Zn)** | ≤ 0.10 | | **Titanium (Ti)** | 0.05–0.15 | | **Zirconium (Zr)** | 0.08–0.18 | | **Other Elements** | ≤ 0.05 each | | **Total Others** | ≤ 0.15 | --- #### **4. Physical Properties** | Property | Value | |----------|-------| | **Density** | 2.78 g/cm³ (0.100 lb/in³) | | **Melting Range** | ~555–645°C (1030–1190°F) | | **Electrical Conductivity** | ~38–42 % IACS | | **Thermal Conductivity** | 130–140 W/m·K | | **Coefficient of Thermal Expansion** | 22.8 × 10⁻⁶/°C (20–100°C) | --- #### **5. Mechanical Properties (T851 Temper)** | Property | Typical Value | |----------|---------------| | **Tensile Strength (Ultimate)** | 480–520 MPa (70–75 ksi) | | **Tensile Yield Strength (0.2% Offset)** | 420–460 MPa (61–67 ksi) | | **Elongation at Break** | 10–14% (in 4√A) | | **Modulus of Elasticity** | 71.0 GPa (10,300 ksi) | | **Shear Strength** | ~270–300 MPa (39–44 ksi) | | **Fatigue Endurance Limit** | ~160–180 MPa (R=0.1) | | **Fracture Toughness (K_IC)** | 30–35 MPa√m | --- #### **6. Key Characteristics & Advantages** - **High Fracture Toughness**: Excellent damage tolerance for aerospace structural parts. - **Good Fatigue Resistance**: Performs well under cyclic loads. - **Stress-Corrosion Cracking Resistance**: T851 temper provides improved SCC resistance compared to T6-type tempers. - **Consistent Properties in Thick Sections**: Suitable for bulkheads, frames, and other heavy structural components. - **Machinability**: Good machinability in the aged condition. --- #### **7. Product Applications** - **Aerospace**: Fuselage frames, wing ribs, bulkheads, and lower wing skins. - **Military Aircraft**: Structural components requiring high damage tolerance. - **Transportation**: Heavy-duty vehicle frames and chassis parts. - **Industrial**: High-strength fixtures and machinery components. --- #### **8. Available Forms** - Plate and Sheet (typically 6–150 mm thickness) - Die Forgings and Hand Forgings - Rolled Ring Forgings --- **Disclaimer**: The information presented is typical and for reference only. Actual properties may vary with processing, size, and heat treatment. For critical applications, contact our technical service team for specific data and processing recommendations.

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 1573 gallon liquid totes Special package is available on request.