Aluminum 68% Magnesium Aluminum Alloy,E FOUR

### **Product Datasheet: Aluminum 68% Magnesium Aluminum Alloy (Al-32Mg)** **Specialized High-Magnesium Content Alloy for Extreme Applications** --- #### **1. Overview** The Aluminum 68% Magnesium Aluminum Alloy (nominally Al-32Mg) represents an extreme composition within the aluminum-magnesium system, approaching the theoretical limits of magnesium solubility in aluminum. This highly specialized alloy exhibits unique characteristics that make it suitable for very specific applications requiring ultra-light weight combined with specialized physical and chemical properties. The alloy's high magnesium content places it in a distinctive category requiring specialized processing and handling protocols. --- #### **2. Key Features & Advantages** - **Ultra-Light Weight:** One of the lightest aluminum-based alloy systems - **Excellent Damping Characteristics:** Superior vibration and noise absorption - **Good Corrosion Resistance:** Particularly in alkaline environments - **Specialized Physical Properties:** Unique thermal and electrical characteristics - **High Magnesium Benefits:** Leverages magnesium's advantageous properties - **Controlled Reactivity:** Useful for specialized chemical applications --- #### **3. Chemical Composition (Weight %)** | Element | Aluminum | Magnesium | Iron (max) | Silicon (max) | Copper (max) | Manganese (max) | Other Elements (max) | |---------------|----------------|---------------|--------------|---------------|--------------|-----------------|---------------------| | **Content (%)** | 30-35 | 65-70 | 0.25 | 0.20 | 0.05 | 0.10 | 0.10 each, 0.30 total | *Note: This composition approaches the Al₃Mg₂ intermetallic phase region, creating unique microstructural characteristics that require extremely controlled processing conditions.* --- #### **4. Typical Physical & Mechanical Properties** **Physical Properties:** | Property | Value | |---------------------------|------------------------------| | **Density** | 2.05 g/cm³ (0.074 lb/in³) | | **Melting Range** | 435-590°C (815-1094°F) | | **Thermal Conductivity** | 55 W/m·K | | **Specific Heat Capacity**| 1100 J/kg·K | | **Coefficient of Thermal Expansion** | 25.8 × 10⁻⁶/°C | | **Electrical Resistivity**| 15.2 μΩ·cm | **Mechanical Properties (As-Cast Condition):** | Property | Minimum Value | Typical Value | Maximum Value | |---------------------------|-------------------------|------------------------|------------------------| | **Ultimate Tensile Strength** | 130 MPa (19 ksi) | 160 MPa (23 ksi) | 190 MPa (28 ksi) | | **Tensile Yield Strength**| 85 MPa (12 ksi) | 110 MPa (16 ksi) | 135 MPa (20 ksi) | | **Elongation** | 2% | 5% | 8% | | **Compressive Yield Strength** | 80 MPa (12 ksi) | 105 MPa (15 ksi) | 130 MPa (19 ksi) | | **Shear Strength** | 95 MPa (14 ksi) | 120 MPa (17 ksi) | 145 MPa (21 ksi) | | **Fatigue Strength** | 50 MPa (7 ksi) | 65 MPa (9 ksi) | 80 MPa (12 ksi) | | **Elastic Modulus** | 50 GPa (7.3×10⁶ psi) | 52 GPa (7.5×10⁶ psi) | 54 GPa (7.8×10⁶ psi) | | **Hardness** | 55 HB | 70 HB | 85 HB | | **Impact Toughness** | 3 J | 6 J | 9 J | --- #### **5. International Standards & Specifications** Due to its specialized nature, this alloy is typically covered by: - **Proprietary Manufacturer Specifications** - **Project-Specific Technical Requirements** - **Custom Alloy Designations** - **Research and Development Protocols** - **Special Application Standards** --- #### **6. Applications** **Specialized Aerospace:** - Spacecraft non-structural components - Satellite specialized housings - Aircraft vibration damping elements - Aerospace research applications - Experimental aircraft components **Defense & Military:** - Specialized munitions components - Military research applications - Defense system prototypes - Naval specialized applications - Military vehicle experimental parts **Research & Development:** - Materials research specimens - Academic research projects - Experimental engineering applications - Prototype development components - Scientific instrument special parts **Industrial Specialties:** - Chemical process specialized components - Research equipment applications - Specialty manufacturing applications - Experimental machinery parts - Custom engineering projects --- #### **7. Processing & Fabrication Parameters** **Specialized Casting Requirements:** - **Pouring Temperature:** 620-720°C (1148-1328°F) - **Protective Atmosphere:** Essential to prevent oxidation - **Mold Materials:** Specialized refractories required - **Solidification Control:** Critical for microstructure **Heat Treatment Considerations:** - **Limited Options:** Due to high magnesium content - **Stress Relief:** 180-250°C (356-482°F) for 1-3 hours - **Specialized Treatments:** Project-specific protocols **Machining & Fabrication:** - **Tooling:** Carbide or specialized tool materials - **Cooling:** Essential for all machining operations - **Safety:** Extensive precautions required - **Finishing:** Specialized surface treatments **Special Handling Requirements:** - **Storage:** Controlled environment necessary - **Safety Protocols:** Comprehensive safety measures - **Processing Environment:** Controlled conditions - **Quality Control:** Extensive testing and verification --- #### **8. Quality Assurance & Safety Protocols** - **Chemical Analysis:** Advanced analytical methods required - **Microstructural Control:** Critical for performance - **Mechanical Testing:** Specialized test protocols - **Safety Documentation:** Comprehensive safety data - **Certification Requirements:** Project-specific standards --- **Disclaimer** This technical data describes a highly specialized aluminum-magnesium alloy with extreme magnesium content. This material requires expert handling, specialized processing equipment, and comprehensive safety protocols. The information provided is for general reference only and represents typical characteristics under controlled conditions. Actual properties and performance may vary significantly based on specific processing parameters, heat treatment, and application conditions. This alloy should only be specified and used by qualified materials engineers with appropriate expertise in high-magnesium aluminum systems. Comprehensive testing and evaluation are mandatory for any application. All safety protocols for reactive metals must be strictly followed, including those specific to magnesium-rich materials.

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 3384 gallon liquid totes Special package is available on request.