2124-T851 Aluminum alloy,Aluminum 2124-T851 alloy,E FORU

### **Product Datasheet: 2124-T851 Aluminum Alloy** --- #### **1. Overview** 2124-T851 Aluminum Alloy is a high-strength aluminum-copper-magnesium alloy supplied in the T851 temper (solution heat-treated, stress-relieved by stretching, and artificially aged). This premium aerospace alloy is specifically designed for applications requiring exceptional strength, superior damage tolerance, and excellent stress corrosion cracking resistance in thick sections. The T851 temper provides an optimal balance of mechanical properties for critical aircraft structures where reliability and performance are paramount. --- #### **2. International Standards** - **UNS**: UNS A92124 - **ASTM**: ASTM B209 (Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate) - **AMS**: AMS 4101 (Aerospace Material Specification) - **AA (Aluminum Association)**: AA 2124 - **ISO**: ISO 6361-2 (Wrought Aluminum and Aluminum Alloy Sheet, Strip and Plate) --- #### **3. Chemical Composition (Weight %)** | 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)** | ≤ 0.25 | | **Chromium (Cr)** | ≤ 0.10 | | **Titanium (Ti)** | ≤ 0.15 | | **Other Elements** | ≤ 0.05 each | | **Total Others** | ≤ 0.15 | --- #### **4. Physical Properties** | Property | Value | |----------|-------| | **Density** | 2.78–2.80 g/cm³ (0.100–0.101 lb/in³) | | **Melting Range** | ~550–640°C (1020–1185°F) | | **Electrical Conductivity** | ~32–36 % IACS | | **Thermal Conductivity** | 110–130 W/m·K | | **Coefficient of Thermal Expansion** | 22.8–23.8 × 10⁻⁶/°C (20–100°C) | | **Modulus of Elasticity** | 71.0–73.0 GPa (10,300–10,600 ksi) | --- #### **5. Mechanical Properties (T851 Temper Condition)** | Property | Typical Value | |----------|---------------| | **Tensile Strength (Ultimate)** | 440–490 MPa (64–71 ksi) | | **Tensile Yield Strength (0.2% Offset)** | 310–370 MPa (45–54 ksi) | | **Elongation at Break** | 8–12% | | **Compressive Yield Strength** | 320–380 MPa (46–55 ksi) | | **Shear Strength** | 260–300 MPa (38–44 ksi) | | **Bearing Yield Strength** | 580–640 MPa (84–93 ksi) | | **Fracture Toughness (L-T方向)** | 28–34 MPa√m | | **Fatigue Strength** | 150–180 MPa (22–26 ksi) | --- #### **6. Key Characteristics & Advantages** - **Excellent Damage Tolerance**: Superior fracture toughness in thick sections - **Enhanced Strength**: Higher strength than T351 temper through artificial aging - **Superior Stress Corrosion Cracking Resistance**: Optimized for critical applications - **Stress-Relieved**: Minimal residual stresses for improved dimensional stability - **Consistent Properties**: Uniform mechanical characteristics through thick sections - **Proven Reliability**: Extensive use in demanding aerospace applications - **Thermal Stability**: Maintains properties under service conditions --- #### **7. Product Applications** - **Aircraft Primary Structures**: Upper wing skins and fuselage components - **Aerospace Bulkheads**: Critical structural bulkheads and frames - **Military Aircraft**: Fighter aircraft structural components - **Space Launch Vehicles**: Rocket structures and fuel tank components - **Helicopter Components**: Main rotor hubs and critical airframe parts - **Defense Systems**: Missile structures and military hardware --- #### **8. Available Forms** - Plate (12–150 mm thickness) - Heavy Forging Stock - Custom Machined Blanks --- #### **9. Processing and Quality Features** - **Machining**: Good machinability with appropriate tooling and techniques - **Forming**: Limited formability in T851 temper; best formed before final aging - **Heat Treatment**: Artificially aged to optimize strength-toughness balance - **Quality Assurance**: 100% ultrasonic inspection for critical applications - **Certification**: Full material traceability and aerospace certification - **Storage**: Proper handling to maintain temper properties and prevent damage --- **Disclaimer**: The information presented is typical and for reference only. Actual properties may vary with processing, size, and specific manufacturing conditions. For critical aerospace applications, contact our technical service team for specific data and certification 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 1600 gallon liquid totes Special package is available on request.