Magnesium AZ80A-F, UNS M11800;,E FOUR

Magnesium AZ80A-F (UNS M11800) Wrought Alloy Product Introduction** **Product Description** Magnesium AZ80A-F is a high-strength wrought magnesium alloy supplied in the as-fabricated condition. Designated under the Unified Numbering System as **UNS M11800**, the "F" temper indicates that the material has been formed by a standard fabrication process (typically extrusion or forging) without subsequent heat treatment. With its nominal composition of Mg-8Al-0.5Zn, this alloy offers a favorable balance of strength, ductility, and manufacturability, making it suitable for various structural applications. --- #### **1. Chemical Composition (Weight %)** The chemical composition features higher aluminum content compared to AZ31 and AZ61 alloys, contributing to its enhanced strength. | Element | Minimum (%) | Maximum (%) | Key Function | | :--- | :--- | :--- | :--- | | **Aluminum (Al)** | 7.8 | 9.2 | Primary strengthener; significantly enhances strength through solid solution strengthening | | **Zinc (Zn)** | 0.20 | 0.8 | Additional strengthening element | | **Manganese (Mn)** | 0.12 | 0.50 | Improves corrosion resistance by forming stable compounds with iron | | **Silicon (Si)** | - | 0.10 | Impurity control | | **Copper (Cu)** | - | 0.05 | Impurity control | | **Iron (Fe)** | - | 0.005 | Impurity control (strictly limited) | | **Nickel (Ni)** | - | 0.005 | Impurity control (strictly limited) | | **Other Elements** | - | 0.30 (total) | - | | **Magnesium (Mg)** | **Balance** | | | *Note: The higher aluminum content (7.8-9.2%) provides significantly improved strength but may reduce ductility compared to lower-aluminum magnesium alloys.* --- #### **2. Physical Properties** | Property | Value / Description | Condition | | :--- | :--- | :--- | | **Density** | 1.80 g/cm³ (0.065 lb/in³) | At 20°C | | **Melting Point** | ~ 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 | | **Electrical Resistivity** | ~ 130 nΩ·m | At 20°C | | **Modulus of Elasticity** | 45 GPa (6.5 x 10⁶ psi) | - | | **Shear Modulus** | 17 GPa (2.5 x 10⁶ psi) | - | | **Poisson's Ratio** | 0.35 | - | --- #### **3. Mechanical Properties (Typical for F Temper - As-Fabricated)** Mechanical properties vary with the fabrication method (extrusion, forging) and section size. | Property | Typical Value (Extrusions) | | :--- | :--- | | **Tensile Strength** | 250 - 310 MPa (36 - 45 ksi) | | **Yield Strength (0.2% Offset)** | 170 - 210 MPa (25 - 30 ksi) | | **Elongation** | 6 - 11% | | **Hardness** | 65 - 75 HB | *Note: Properties are highly dependent on fabrication parameters such as extrusion ratio, temperature, and cooling rate.* --- #### **4. International Standards** AZ80A-F is recognized in several international standards for wrought magnesium products. | Standard Organization | Standard Designation | | :--- | :--- | | **ASTM International** | **ASTM B107/B107M** (Extruded Rod, Bar, Shapes) | | **SAE International** | **SAE J465** | | **UNS (Unified Numbering System)** | **M11800** | | **ISO (International Org. for Standardization)** | **ISO 3116** (Wrought Magnesium and Magnesium Alloys) | --- #### **5. Product Applications** AZ80A-F's enhanced strength characteristics make it suitable for demanding structural applications across various industries. * **Aerospace:** * Aircraft structural brackets and fittings * Wing components and ribs * Helicopter transmission components * Missile and spacecraft structures * **Automotive:** * High-performance steering wheel cores * Engine brackets and mounts * Transmission components * Suspension parts * **Defense & Military:** * Weapon system components * Armor components * Portable equipment structures * Military vehicle components * **Industrial Equipment:** * High-strength gears and cams * Machinery components requiring vibration damping * Material handling equipment parts * Robotics components --- #### **6. Key Characteristics & Considerations** * **Advantages:** * **High Strength:** Superior mechanical properties compared to AZ31 and AZ61 alloys * **Good Hot Workability:** Excellent formability at elevated temperatures (300-400°C) * **Cost-Effective:** No additional heat treatment costs * **Excellent Damping Capacity:** Effectively absorbs vibration and shock * **Good Machinability:** Can be machined to high precision with excellent surface finish * **Considerations:** * **Variable Properties:** Mechanical properties depend heavily on fabrication parameters * **Residual Stresses:** May contain higher residual stresses compared to heat-treated tempers * **Moderate Room-Temperature Formability:** Limited ductility at room temperature * **Corrosion Protection:** Requires protective coatings for severe environments **Summary** **Magnesium AZ80A-F (UNS M11800)** is a medium-to-high strength wrought magnesium alloy that offers a practical balance between mechanical performance and manufacturing economics. The as-fabricated condition makes it readily available for components that will be used without subsequent heat treatment, providing a cost-effective solution for applications requiring higher strength than the AZ31/AZ61 series can provide. Its compliance with international standards ensures consistent quality for structural components in aerospace, automotive, and defense applications where both weight reduction and load-bearing capacity are critical 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 3306 gallon liquid totes Special package is available on request.