Magnesium AZ80A-T5, Forged，UNS M11800,E FOUR

Magnesium AZ80A-T5, Forged (UNS M11800) Product Introduction** **Product Description** Magnesium AZ80A-T5 is a high-strength forged magnesium alloy supplied in the artificially aged condition. Designated as **UNS M11800**, the "T5" temper indicates that the forged components have undergone artificial aging after the forging process to enhance their mechanical properties. This alloy offers an outstanding combination of high strength-to-weight ratio, good ductility, and excellent fatigue resistance, making it ideal for critical structural applications. --- ### **1. Chemical Composition (Weight %)** | Element | Minimum (%) | Maximum (%) | Key Function | |---------|--------------|--------------|--------------| | **Aluminum (Al)** | 7.8 | 9.2 | Primary strengthener, enhances strength through solid solution strengthening | | **Zinc (Zn)** | 0.20 | 0.8 | Additional strengthening element | | **Manganese (Mn)** | 0.12 | 0.50 | Improves corrosion resistance | | **Silicon (Si)** | - | 0.10 | Impurity control | | **Copper (Cu)** | - | 0.05 | Impurity control | | **Iron (Fe)** | - | 0.005 | Impurity control | | **Nickel (Ni)** | - | 0.005 | Impurity control | | **Other Elements** | - | 0.30 (total) | - | | **Magnesium (Mg)** | **Balance** | | | --- ### **2. Physical Properties** | Property | Value | Condition | |----------|-------|-----------| | **Density** | 1.80 g/cm³ (0.065 lb/in³) | At 20°C | | **Melting Range** | 430 - 605°C (806 - 1121°F) | - | | **Thermal Conductivity** | 78 W/m·K | At 25°C | | **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 | At 20°C | --- ### **3. Mechanical Properties (Typical for Forged T5 Temper)** | Property | Typical Value | |----------|---------------| | **Tensile Strength** | 330 - 380 MPa (48 - 55 ksi) | | **Yield Strength (0.2% Offset)** | 230 - 280 MPa (33 - 41 ksi) | | **Elongation** | 5 - 8% | | **Compressive Yield Strength** | 230 - 280 MPa (33 - 41 ksi) | | **Hardness** | 75 - 85 HB | | **Shear Strength** | 180 - 200 MPa (26 - 29 ksi) | | **Fatigue Strength** | 130 - 150 MPa (19 - 22 ksi) | --- ### **4. International Standards** | Standard Organization | Standard Designation | |-----------------------|----------------------| | **ASTM International** | **ASTM B91** (Standard Specification for Magnesium-Alloy Forgings) | | **SAE International** | **SAE J465** | | **UNS** | **M11800** | | **AMS** | **AMS 4357** (Magnesium Alloy Forgings 8.5Al-0.5Zn (AZ80A-T5)) | | **ISO** | **ISO 3116** (Wrought Magnesium Alloys) | --- ### **5. Product Applications** **Aerospace & Defense:** - Aircraft landing gear components - Helicopter rotor hubs and components - Missile structural components - Engine mounting brackets - Wing attachment fittings **Automotive:** - High-performance wheel hubs - Steering knuckles - Transmission components - Engine brackets - Suspension components **Industrial & Commercial:** - High-speed rotating components - Robotics structural parts - Material handling equipment - Portable tool housings - Sports equipment components --- ### **6. Key Characteristics & Considerations** **Advantages:** - **Superior Strength-to-Weight Ratio**: Excellent mechanical properties with low density - **Good Fatigue Resistance**: Suitable for dynamic loading applications - **Enhanced Damping Capacity**: Excellent vibration absorption characteristics - **Good Corrosion Resistance**: Adequate performance with proper surface protection - **Excellent Machinability**: Can be precision machined to tight tolerances **Heat Treatment Specification:** - **Artificial Aging**: 175-200°C (350-390°F) for 16-24 hours - **Cooling**: Air cool after aging treatment - **No solution heat treatment required** **Forging Considerations:** - Optimal forging temperature: 320-400°C (610-750°F) - Good forgeability within proper temperature range - Requires controlled cooling after forging - Suitable for both open-die and closed-die forging processes **Limitations:** - Limited formability at room temperature - Requires protective coatings for corrosive environments - Higher cost compared to aluminum forgings - Special handling required for machining (chip disposal) --- ### **Summary** **Magnesium AZ80A-T5 Forged (UNS M11800)** represents the premium end of wrought magnesium alloys, offering exceptional strength and reliability for critical structural applications. The combination of forging process and T5 heat treatment results in superior mechanical properties with enhanced grain structure and directional strength characteristics. This alloy is particularly valuable in weight-sensitive applications where high strength, good fatigue resistance, and excellent damping capacity are required. Compliance with international standards including ASTM B91, AMS 4357, and SAE J465 ensures consistent quality and performance for aerospace, automotive, and high-performance industrial 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 3307 gallon liquid totes Special package is available on request.