Magnesium AZ80A-T5, Extruded，UNS M11800; Mg,E FOUR

Magnesium AZ80A-T5, Extruded (UNS M11800)** **Product Description** Magnesium AZ80A-T5 is a high-strength wrought magnesium alloy supplied in the extruded and artificially aged condition. Designated as UNS M11800, this alloy contains nominally 8% aluminum and 0.5% zinc as primary alloying elements. The T5 temper (artificial aging after extrusion) provides an excellent combination of high strength, good ductility, and lightweight properties, making it suitable for demanding structural applications. --- #### **1. Chemical Composition (Weight %)** | Element | Minimum (%) | Maximum (%) | | :--- | :--- | :--- | | **Aluminum (Al)** | 7.8 | 9.2 | | **Zinc (Zn)** | 0.20 | 0.8 | | **Manganese (Mn)** | 0.12 | 0.50 | | **Silicon (Si)** | - | 0.10 | | **Copper (Cu)** | - | 0.05 | | **Iron (Fe)** | - | 0.005 | | **Nickel (Ni)** | - | 0.005 | | **Other Elements** | - | 0.30 (total) | | **Magnesium (Mg)** | **Balance** | --- #### **2. Physical Properties** | Property | Value | | :--- | :--- | | **Density** | 1.80 g/cm³ (0.065 lb/in³) | | **Melting Range** | 430 - 605°C (806 - 1121°F) | | **Thermal Conductivity** | 78 W/m·K | | **Coefficient of Thermal Expansion** | 26.8 μm/m·°C (20-200°C) | | **Modulus of Elasticity** | 45 GPa (6.5 × 10⁶ psi) | | **Shear Modulus** | 17 GPa (2.5 × 10⁶ psi) | | **Poisson's Ratio** | 0.35 | | **Electrical Resistivity** | 130 nΩ·m | --- #### **3. Mechanical Properties (Extruded, T5 Temper)** | Property | Typical Value | | :--- | :--- | | **Tensile Strength** | 345 MPa (50 ksi) | | **Yield Strength (0.2% Offset)** | 250 MPa (36 ksi) | | **Elongation** | 6% | | **Compressive Yield Strength** | 250 MPa (36 ksi) | | **Hardness** | 75 HB | | **Shear Strength** | 180 MPa (26 ksi) | | **Fatigue Strength** | 140 MPa (20 ksi) | --- #### **4. International Standards** | Standard | Title | | :--- | :--- | | **ASTM B107/B107M** | Standard Specification for Magnesium-Alloy Extruded Bars, Rods, Profiles, Tubes, and Wire | | **SAE J465** | Magnesium Alloys (Cast and Wrought) | | **AMS 4356** | Magnesium Alloy, Extruded, 8.5Al-0.5Zn (AZ80A-T5) | | **ISO 3116** | Magnesium and magnesium alloys - Wrought magnesium alloys | --- #### **5. Product Applications** * **Aerospace Structures** * Aircraft seat frames and components * Wing ribs and structural members * Helicopter transmission housings * Missile components and airframes * **Automotive Components** * Steering wheel cores * Wheel rims (high-performance vehicles) * Engine brackets and supports * Transmission components * **Defense Applications** * Weapon system components * Armor components * Portable equipment structures * Military vehicle components * **Industrial Equipment** * High-speed rotating components * Material handling equipment * Robotics arms and components * Portable tool housings --- #### **6. Key Characteristics** * **Advantages:** * High strength-to-weight ratio * Good fatigue resistance * Excellent damping capacity * Good machinability * Better corrosion resistance than AZ31 * Good surface finish capability * **Heat Treatment:** * Artificial aging: 175-200°C for 16-24 hours * Air cooling after aging * No solution heat treatment required * **Limitations:** * Limited formability at room temperature * Requires elevated temperatures for bending and forming * Lower corrosion resistance than aluminum alloys * Higher cost than AZ31 series alloys * **Manufacturing Notes:** * Excellent extrudability * Suitable for complex profiles * Good surface quality after extrusion * Responds well to subsequent machining operations **Summary** Magnesium AZ80A-T5 extruded alloy represents the high-strength end of the wrought magnesium alloy spectrum. With its higher aluminum content and optimized T5 heat treatment, it delivers superior mechanical properties while maintaining the characteristic lightweight advantage of magnesium. The extrusion process allows for the production of complex cross-sectional profiles, making it ideal for weight-critical structural applications in aerospace, automotive, and defense industries. Compliance with ASTM, AMS, and SAE standards ensures consistent quality and performance for demanding engineering applications.

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 3304 gallon liquid totes Special package is available on request.