Elektron W24 Magnesium Alloy，AZ61,E FOUR

### **Elektron W24 / AZ61 Magnesium Alloy** **Product Overview** Elektron W24, commercially designated as AZ61, is a medium-to-high-strength magnesium-aluminum-zinc wrought alloy that offers an excellent balance of strength, ductility, and formability. As one of the most versatile wrought magnesium alloys, AZ61 provides superior mechanical properties compared to AZ31 while maintaining good workability and corrosion resistance. The alloy is particularly valued for its excellent response to extrusion and forging processes, making it suitable for structural components requiring higher strength than what AZ31 can provide. This alloy is commonly supplied as extruded rods, bars, profiles, tubes, and forged components, available in various tempers including F (as-fabricated) and T5 (artificially aged). --- #### **1. Chemical Composition** AZ61 features a balanced aluminum-zinc composition optimized for wrought processing and strength. | Element | Composition (% by Weight) | | :---------------- | :-------------------------------- | | **Aluminum (Al)** | 5.8 - 7.2 % | | **Zinc (Zn)** | 0.4 - 1.5 % | | **Manganese (Mn)** | 0.15 - 0.50 % | | **Copper (Cu)** | ≤ 0.05 % | | **Iron (Fe)** | ≤ 0.05 % | | **Nickel (Ni)** | ≤ 0.005 % | | **Silicon (Si)** | ≤ 0.10 % | | **Other Impurities** | ≤ 0.30 % (each) | | **Magnesium (Mg)** | Balance | *Note:* The higher **aluminum** content compared to AZ31 provides enhanced strength through solid solution strengthening and precipitation hardening. **Zinc** contributes to strength and improves the alloy's response to age hardening, while **manganese** controls iron impurities to maintain corrosion resistance. --- #### **2. Physical & Mechanical Properties** AZ61 exhibits improved strength characteristics while maintaining adequate ductility. **Physical Properties:** * **Density:** 1.80 g/cm³ (0.065 lb/in³) * **Melting Range:** 528 - 610 °C (982 - 1130 °F) * **Coefficient of Thermal Expansion:** 26.5 μm/m·°C (20-200°C) * **Thermal Conductivity:** 78 W/m·K * **Modulus of Elasticity:** 45 GPa (6.5 × 10³ ksi) **Typical Mechanical Properties (Extruded & T5 Temper):** * **Ultimate Tensile Strength (UTS):** 275 - 310 MPa (40 - 45 ksi) * **Tensile Yield Strength (TYS):** 165 - 205 MPa (24 - 30 ksi) * **Elongation:** 6 - 12% * **Compressive Yield Strength:** 130 - 165 MPa (19 - 24 ksi) * **Shear Strength:** 145 - 175 MPa (21 - 25 ksi) * **Fatigue Strength:** 120 - 140 MPa (17 - 20 ksi) * **Hardness:** 65 - 75 HBW **Elevated Temperature Performance:** * **Maintains useful mechanical properties up to 120°C (248°F)** * **Good formability at elevated temperatures (200-350°C)** * **Adequate creep resistance below 100°C** * **Gradual strength reduction above 150°C** --- #### **3. International Standards & Specifications** AZ61 is recognized by multiple international standards organizations. * **ASTM International:** **ASTM B107** (Standard Specification for Magnesium-Alloy Extruded Bars, Rods, Profiles, Tubes, and Wire) * **ASTM International:** **ASTM B91** (Standard Specification for Magnesium-Alloy Forgings) * **SAE International:** **SAE J465** * **UNS Designation:** **UNS M11610** * **ISO Standards:** **ISO 3116** (Wrought magnesium and magnesium alloys) * **European Standards:** **EN 1753 Mg-Al6Zn1** * **Japanese Standards:** **JIS H 4203** * **Proprietary Designation:** **Elektron AZ61** / **W24** (Luxfer MEL Technologies) --- #### **4. Product Applications** AZ61 finds extensive use in applications requiring higher strength than AZ31 can provide. * **Aerospace & Defense:** * **Aircraft Structural Brackets and Fittings** * **Helicopter Transmission Components** * **Missile Body Sections and Fins** * **Aircraft Seat Frames and Components** * **Electronic Equipment Mounting Structures** * **Automotive & Transportation:** * **Steering Wheel Cores and Components** * **Seat Frame Structures** * **Wheel Rims and Hubs** * **Bicycle Frames and Components** * **Motorcycle Wheels and Frames** * **Industrial & Consumer Goods:** * **Power Tool Housings and Components** * **Material Handling Equipment Parts** * **Sporting Goods and Equipment** * **Portable Electronic Device Frames** * **Special Applications:** * **Nuclear Fuel Handling Tools** * **Portable Military Equipment** * **High-Performance Racing Components** --- #### **5. Manufacturing Characteristics** **Forming and Processing:** * **Excellent extrudability** for complex profiles * **Good forgeability** with proper temperature control * **Superior hot workability** at 300-400°C * **Good rollability** for sheet and plate production **Secondary Processing:** * **Good machinability** with proper techniques * **Excellent weldability** using TIG and MIG processes * **Good response to heat treatment** (T5 temper) * **Compatible with standard surface treatments** and coatings * **Good fatigue resistance** in dynamically loaded components --- **Summary** **Elektron W24 / AZ61 Magnesium Alloy** occupies a strategic position in the magnesium alloy family, offering an optimal balance between **strength**, **ductility**, and **manufacturability**. The alloy's higher **aluminum content** compared to AZ31 provides significantly improved mechanical properties while maintaining good workability and corrosion resistance. Compliance with international standards including **ASTM B107** and **ASTM B91** ensures consistent quality and performance in structural applications. AZ61's excellent extrudability and forgeability make it particularly suitable for manufacturing complex structural components that require higher strength than what AZ31 can offer, while its good weldability and machinability facilitate component fabrication and assembly. The alloy continues to be widely specified across aerospace, automotive, and industrial sectors where its balanced property profile provides an excellent solution for weight-critical structural applications demanding reliable performance and manufacturability.

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 3422 gallon liquid totes Special package is available on request.