Aluminum 50% Magnesium Aluminum Alloy,E FOUR

### **Product Datasheet: Aluminum 50% Magnesium Aluminum Alloy (Al-50Mg)** **High-Magnesium Aluminum Alloy for Specialized Applications** --- #### **1. Overview** The Aluminum 50% Magnesium Aluminum Alloy (approximately Al-50Mg) is a specialized high-magnesium aluminum alloy that represents an extreme composition within the aluminum-magnesium system. This unique alloy combines the lightweight characteristics of magnesium with the beneficial properties of aluminum, creating a material with distinctive characteristics for specialized applications. Due to its high magnesium content, this alloy exhibits specific processing requirements and application considerations. --- #### **2. Key Features & Advantages** - **Ultra-Light Weight:** Significantly lighter than conventional aluminum alloys - **Good Corrosion Resistance:** Particularly in marine environments - **Excellent Damping Capacity:** Superior vibration absorption characteristics - **Good Machinability:** Can be machined with proper techniques - **Specialized Properties:** Unique combination of aluminum and magnesium benefits - **Moderate Strength:** Suitable for non-structural applications --- #### **3. Chemical Composition (Weight %)** | Element | Aluminum | Magnesium | Iron (max) | Silicon (max) | Copper (max) | Other Elements (max) | |---------------|----------------|---------------|--------------|---------------|--------------|---------------------| | **Content (%)** | 45-55 | 45-55 | 0.40 | 0.30 | 0.10 | 0.15 each, 0.35 total | *Note: This composition represents an intermetallic compound-rich region in the Al-Mg system, requiring specialized processing and handling due to the high magnesium content.* --- #### **4. Typical Physical & Mechanical Properties** **Physical Properties:** | Property | Value | |---------------------------|------------------------------| | **Density** | 2.15 g/cm³ (0.077 lb/in³) | | **Melting Range** | 450-600°C (842-1112°F) | | **Thermal Conductivity** | 65 W/m·K | | **Specific Heat Capacity**| 1050 J/kg·K | | **Coefficient of Thermal Expansion** | 24.5 × 10⁻⁶/°C | | **Electrical Resistivity**| 12.5 μΩ·cm | **Mechanical Properties (Typical):** | Property | As-Cast Condition | Heat Treated Condition | |---------------------------|-------------------------|--------------------------| | **Ultimate Tensile Strength** | 150-190 MPa (22-28 ksi) | 170-220 MPa (25-32 ksi) | | **Tensile Yield Strength**| 100-130 MPa (15-19 ksi) | 120-160 MPa (17-23 ksi) | | **Elongation** | 3-8% | 5-12% | | **Compressive Yield Strength** | 95-125 MPa (14-18 ksi) | 115-155 MPa (17-22 ksi) | | **Shear Strength** | 110-140 MPa (16-20 ksi) | 130-170 MPa (19-25 ksi) | | **Fatigue Strength** | 60-80 MPa (9-12 ksi) | 75-100 MPa (11-15 ksi) | | **Elastic Modulus** | 55 GPa (8.0×10⁶ psi) | 55 GPa (8.0×10⁶ psi) | | **Hardness** | 60-80 HB | 70-95 HB | | **Impact Toughness** | 4-8 J | 6-12 J | --- #### **5. International Standards** This specialized alloy may be referenced in: - **Proprietary Specifications:** Manufacturer-specific standards - **Custom Alloy Designations:** Project-specific material requirements - **ASTM B928:** Standard Specification for High Magnesium Aluminum-Alloy Products (for reference) - **AMS 4416:** For related magnesium-aluminum compositions --- #### **6. Applications** **Aerospace & Defense:** - Non-structural aircraft components - Vibration damping elements - Specialized instrumentation housings - Military equipment components - Satellite non-critical parts **Marine Applications:** - Marine hardware components - Boat fitting applications - Offshore equipment parts - Naval vessel components - Underwater instrumentation housings **Industrial Applications:** - Vibration damping fixtures - Specialized machinery components - Process industry parts - Material handling applications - Custom engineering components **Specialized Applications:** - Pyrotechnic applications - Chemical process equipment - Research and development projects - Prototype development - Specialty engineering applications --- #### **7. Processing & Fabrication Parameters** **Casting Characteristics:** - **Pouring Temperature:** 650-750°C (1202-1382°F) - **Mold Requirements:** Specialized refractory materials - **Solidification Characteristics:** Narrow freezing range - **Feeding Requirements:** Moderate **Heat Treatment Options:** - **Solution Treatment:** 350-420°C (662-788°F) for 2-8 hours - **Aging Treatments:** 150-250°C (302-482°F) for 4-24 hours - **Stress Relieving:** 200-300°C (392-572°F) for 1-4 hours **Machining Characteristics:** - **Tool Selection:** Carbide tools recommended - **Cutting Speed:** Moderate speeds with adequate cooling - **Surface Finish:** Good with proper techniques - **Safety:** Requires proper chip management **Special Considerations:** - **Reactivity:** Requires careful handling due to high magnesium content - **Corrosion Protection:** Needs appropriate surface treatments - **Welding:** Specialized procedures required - **Storage:** Proper conditions to prevent degradation --- #### **8. Quality Assurance & Safety** - **Chemical Control:** Strict composition control required - **Microstructural Examination:** Essential for quality verification - **Mechanical Testing:** Standard test methods applicable - **Safety Protocols:** Special handling procedures necessary - **Documentation:** Full traceability and certification --- **Disclaimer** This technical data represents general characteristics for a high-magnesium aluminum alloy of approximately 50% magnesium content. This is a specialized material requiring particular processing expertise and safety precautions. Properties and process parameters may vary significantly based on exact composition, processing methods, and heat treatment. Users must conduct comprehensive testing and evaluation for specific applications. Special safety precautions are required due to the material's reactivity and processing characteristics. Consultation with materials engineering specialists is strongly recommended before specification or use.

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 3383 gallon liquid totes Special package is available on request.