Elektron AM50A Magnesium Alloy,E FOUR

### **Elektron AM50A Magnesium Alloy** **Product Overview** Elektron AM50A is a medium-strength magnesium-aluminum-manganese casting alloy specifically engineered to provide an optimal balance of ductility, impact strength, and energy absorption capabilities. As part of the Mg-Al-Mn system, AM50A offers superior elongation and toughness compared to higher aluminum-content alloys like AZ91, making it particularly suitable for automotive safety components and applications requiring high vibration damping and energy dissipation. The alloy maintains good corrosion resistance while providing excellent castability for both die casting and sand casting processes. This alloy is widely used in automotive safety components and other applications where energy absorption and ductility are more critical than ultimate tensile strength. --- #### **1. Chemical Composition** AM50A features a balanced aluminum content with controlled manganese to optimize ductility and corrosion resistance. | Element | Composition (% by Weight) | | :---------------- | :-------------------------------- | | **Aluminum (Al)** | 4.5 - 5.5 % | | **Manganese (Mn)** | 0.26 - 0.6 % | | **Zinc (Zn)** | ≤ 0.22 % | | **Silicon (Si)** | ≤ 0.10 % | | **Copper (Cu)** | ≤ 0.008 % | | **Iron (Fe)** | ≤ 0.004 % | | **Nickel (Ni)** | ≤ 0.001 % | | **Other Impurities** | ≤ 0.01 % (each) | | **Magnesium (Mg)** | Balance | *Note:* The moderate **aluminum** content (compared to AZ91) reduces the amount of brittle Mg₁₇Al₁₂ phase, resulting in improved ductility. **Manganese** contributes to corrosion resistance by forming compounds with iron impurities, while the strict control of **zinc** helps maintain the alloy's excellent ductility characteristics. --- #### **2. Physical & Mechanical Properties** AM50A exhibits outstanding ductility and energy absorption characteristics. **Physical Properties:** * **Density:** 1.77 g/cm³ (0.064 lb/in³) * **Melting Range:** 543 - 620 °C (1009 - 1148 °F) * **Coefficient of Thermal Expansion:** 26.0 μm/m·°C (20-200°C) * **Thermal Conductivity:** 65 W/m·K * **Damping Capacity:** Excellent **Typical Mechanical Properties (As-Die Cast):** * **Ultimate Tensile Strength (UTS):** 210 - 230 MPa (30 - 33 ksi) * **Tensile Yield Strength (TYS):** 110 - 130 MPa (16 - 19 ksi) * **Elongation:** 8 - 15% * **Compressive Yield Strength:** 110 - 130 MPa (16 - 19 ksi) * **Impact Strength (Charpy):** 5 - 8 J (4 - 6 ft·lb) * **Fatigue Strength:** 100 - 120 MPa (15 - 17 ksi) * **Hardness:** 55 - 65 HBW * **Modulus of Elasticity:** 45 GPa (6.5 × 10³ ksi) **Energy Absorption Characteristics:** * **Excellent vibration damping capacity** * **High energy absorption in impact situations** * **Good fatigue resistance under cyclic loading** --- #### **3. International Standards & Specifications** AM50A is recognized by major international standards organizations. * **ASTM International:** **ASTM B94** (Standard Specification for Magnesium-Alloy Die Castings) * **ISO Standards:** **ISO 16220** (Magnesium and magnesium alloys - Castings) * **SAE International:** **SAE J465** * **UNS Designation:** **UNS M10500** * **German Standards:** **DIN EN 1753 Mg-Al5Mn** * **Japanese Standards:** **JIS H 5303** * **Automotive Standards:** Various OEM specifications --- #### **4. Product Applications** AM50A is predominantly used in automotive applications where safety and energy absorption are paramount. * **Automotive Safety Components:** * **Steering Wheel Cores and Armatures** * **Seat Frames and Adjusters** * **Instrument Panel Structures** * **Steering Column Components** * **Wheel Rims** * **Automotive Structural Components:** * **Valve Covers** * **Timing Chain Covers** * **Intake Manifolds** * **Transmission Cases** * **Consumer and Industrial Applications:** * **Power Tool Housings** * **Lawn and Garden Equipment** * **Sporting Goods** * **Portable Electronic Device Frames** * **Aerospace Applications:** * **Aircraft Seat Components** * **Non-structural Aircraft Interior Parts** --- #### **5. Manufacturing Characteristics** **Casting Performance:** * Excellent castability with good fluidity * Reduced hot cracking tendency compared to higher aluminum alloys * Good pressure tightness * Suitable for both thin and thick-walled sections * Consistent mechanical properties throughout casting **Secondary Processing:** * Good machinability with smooth surface finish * Excellent vibration damping during machining * Good weldability using TIG and MIG processes * Responsive to surface treatments and coatings * Good paint adhesion characteristics --- **Summary** **Elektron AM50A Magnesium Alloy** occupies a unique position in the magnesium alloy family, offering an exceptional combination of **ductility**, **impact strength**, and **energy absorption** capabilities. The optimized **aluminum-manganese** system with controlled chemistry provides superior mechanical properties for safety-critical applications where energy dissipation is more important than ultimate strength. Compliance with international standards including **ASTM B94** and **ISO 16220** ensures consistent quality and performance. AM50A has become the material of choice for automotive steering wheels and other safety components, where its excellent vibration damping and energy absorption characteristics provide significant safety advantages. The alloy continues to expand magnesium's application boundaries in the automotive safety sector, offering designers a lightweight solution that doesn't compromise on crash performance or occupant safety.

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 3407 gallon liquid totes Special package is available on request.