Magnesium AM100A-T4, Cast,E FOUR

### **Product Datasheet: Magnesium AM100A-T4 Cast Alloy** **Introduction** Magnesium AM100A-T4 is a heat-treated magnesium casting alloy that undergoes solution heat treatment to enhance its mechanical properties. The "A" designates aluminum as the primary alloying element, "M" represents manganese, and "100" indicates approximately 10% aluminum content. The **-T4 temper** signifies that the casting has been solution heat-treated and naturally aged to achieve improved ductility and toughness. This condition offers an excellent balance between strength and elongation, making it suitable for applications requiring good formability and impact resistance. **Key Characteristics** - **Enhanced Ductility**: Solution treatment significantly improves elongation compared to as-cast condition - **Good Toughness**: Excellent impact resistance for structural applications - **Improved Corrosion Resistance**: Solution treatment enhances corrosion performance - **Dimensional Stability**: Suitable for applications requiring stable mechanical properties --- #### **1. Chemical Composition (Weight %)** The composition conforms to standard specifications for AM100A alloy: | Element | Content (%) | |---------|-------------| | **Aluminum (Al)** | 9.3 - 10.7 | | **Manganese (Mn)** | 0.10 - 0.30 | | **Zinc (Zn)** | ≤ 0.30 | | **Silicon (Si)** | ≤ 0.30 | | **Copper (Cu)** | ≤ 0.10 | | **Iron (Fe)** | ≤ 0.005 | | **Nickel (Ni)** | ≤ 0.01 | | **Other Elements** | ≤ 0.30 (each) | | **Total Impurities** | ≤ 0.50 | | **Magnesium (Mg)** | Remainder | --- #### **2. Physical Properties** | Property | Value | |----------|--------| | **Density** | 1.81 g/cm³ (0.065 lb/in³) | | **Melting Range** | 460 - 595°C (860 - 1105°F) | | **Thermal Conductivity** | 55-65 W/m·K | | **Coefficient of Thermal Expansion** | 25.8-26.2 µm/m·K (20-100°C) | | **Modulus of Elasticity** | 44-46 GPa (6.4-6.7 × 10⁶ psi) | | **Specific Heat Capacity** | 1050 J/kg·K | --- #### **3. Mechanical Properties (T4 Condition)** **Room Temperature Properties:** | Property | Value | |----------|--------| | **Tensile Strength, Ultimate** | 180-220 MPa (26,000-32,000 psi) | | **Tensile Strength, Yield (0.2% Offset)** | 90-110 MPa (13,000-16,000 psi) | | **Elongation** | 8-15% (in 2 inches) | | **Compressive Yield Strength** | 90-110 MPa (13,000-16,000 psi) | | **Hardness, Brinell** | 55-65 HB | | **Shear Strength** | 125-150 MPa (18,000-22,000 psi) | | **Fatigue Strength** | 70-85 MPa (10,000-12,000 psi) | **Elevated Temperature Properties:** - Maintains good mechanical properties up to 100°C (212°F) - Gradual strength reduction above 120°C (250°F) --- #### **4. International Standards** AM100A-T4 is recognized in several international standards: - **ASTM Standards:** - **ASTM B80**: Standard Specification for Magnesium-Alloy Sand Castings - **ASTM B199**: Standard Specification for Magnesium-Alloy Permanent Mold Castings - **ASTM B403**: Standard Specification for Magnesium-Alloy Investment Castings - **SAE**: **SAE J465** - Wrought and Cast Magnesium Alloys - **AMS**: **AMS 4439** (Covers heat-treated conditions) - **UNS**: **M10100** - **ISO**: **ISO 16220** - Magnesium and magnesium alloys - Magnesium alloy ingots and castings - **Federal Standard**: **QQ-M-56** --- #### **5. Product Applications** AM100A-T4 is utilized in applications requiring enhanced ductility and impact resistance: **Aerospace Applications:** - Aircraft wheel components - Gearbox housings - Engine accessory mounts - Structural brackets and fittings **Defense Applications:** - Military vehicle components - Radar and electronic housings - Weapon system components **Industrial Applications:** - High-speed machinery components - Robotic arms and fixtures - Material handling equipment **Automotive Applications:** - Racing components - Specialized vehicle parts - Performance automotive brackets --- #### **6. Heat Treatment Specification** **T4 Heat Treatment Process:** - **Solution Treatment**: 425±5°C (797±9°F) for 8-16 hours - **Quenching**: Hot water quenching at 70-100°C (158-212°F) - **Natural Aging**: Room temperature aging for minimum 10 days **Microstructural Features:** - Homogenized microstructure - Dissolved intermetallic phases - Supersaturated solid solution --- #### **7. Manufacturing Considerations** **Casting Recommendations:** - Suitable for sand, permanent mold, and investment casting - Controlled solidification rate required for optimal properties - Recommended pouring temperature: 700-750°C (1292-1382°F) **Machinability:** - Excellent machining characteristics - Good surface finish achievable - Use sharp tools and proper cooling **Joining Methods:** - TIG welding recommended - Resistance welding applicable - Adhesive bonding suitable **Surface Protection:** - Chromate conversion coating - Anodizing treatments - Painting and powder coating --- **Technical Notes:** 1. The T4 condition provides optimal ductility for subsequent forming operations 2. Properties may be further enhanced by artificial aging (T6 condition) 3. Section thickness significantly affects mechanical properties 4. Stress relief may be required after machining **Disclaimer:** This data sheet provides typical values and characteristics. Actual properties may vary depending on casting method, section size, and foundry practices. Users should conduct appropriate testing to verify suitability for specific applications. Always consult current material specifications for design and procurement purposes.

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 3271 gallon liquid totes Special package is available on request.