Magnesium AM100A-T6, Cast,E FOUR

### **Product Datasheet: Magnesium AM100A-T6 Cast Alloy** **Introduction** Magnesium AM100A-T6 is a premium heat-treated casting alloy that undergoes complete solution heat treatment followed by artificial aging to achieve optimal mechanical properties. The T6 temper represents the peak strength condition for this alloy, providing the best combination of high strength, good ductility, and excellent hardness. This treatment makes AM100A-T6 particularly suitable for high-structural integrity applications where maximum mechanical performance is required. **Key Characteristics** - **Peak Strength Condition**: Optimal combination of tensile and yield strength - **Good Ductility**: Maintains reasonable elongation despite high strength - **Excellent Hardness**: Superior wear resistance among magnesium casting alloys - **Enhanced Fatigue Performance**: Improved cyclic loading capability - **Good Corrosion Resistance**: When properly surface treated --- #### **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 | | **Electrical Resistivity** | 120-140 nΩ·m | --- #### **3. Mechanical Properties (T6 Condition)** **Room Temperature Properties:** | Property | Value | |----------|--------| | **Tensile Strength, Ultimate** | 220-255 MPa (31,900-37,000 psi) | | **Tensile Strength, Yield (0.2% Offset)** | 110-145 MPa (16,000-21,000 psi) | | **Elongation** | 2-5% (in 2 inches) | | **Compressive Yield Strength** | 110-145 MPa (16,000-21,000 psi) | | **Hardness, Brinell** | 65-75 HB | | **Shear Strength** | 140-165 MPa (20,300-23,900 psi) | | **Fatigue Strength** | 80-95 MPa (11,600-13,800 psi) | | **Impact Strength (Charpy)** | 1.5-2.5 J (1.1-1.8 ft-lb) | **Elevated Temperature Properties:** - Maintains useful strength up to 120°C (250°F) - Good short-term exposure capability to 150°C (300°F) - Gradual strength reduction above 150°C --- #### **4. International Standards** AM100A-T6 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** - Castings, Magnesium Alloy, Sand 9.5Al-0.13Mn (AM100A) Solution and Precipitation Heat Treated - **UNS**: **M10100** - **ISO**: **ISO 16220** - Magnesium and magnesium alloys - Magnesium alloy ingots and castings - **DIN**: **DIN 1729-2** - Magnesium casting alloys --- #### **5. Product Applications** AM100A-T6 is specified for high-performance applications requiring maximum strength: **Aerospace Applications:** - Aircraft wheels and brake components - Gearbox housings and transmission cases - Engine accessory mounts and brackets - Helicopter transmission components **Defense Applications:** - Military vehicle structural components - Weapon system housings - Armored vehicle parts - Military aircraft components **Automotive Applications:** - High-performance racing components - Specialty vehicle structural parts - Racing engine brackets and mounts - Competition transmission cases **Industrial Applications:** - High-speed machinery components - Power transmission housings - Heavy-duty equipment parts - Material handling structural components --- #### **6. Heat Treatment Specification** **T6 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) - **Artificial Aging**: 215±5°C (419±9°F) for 4-8 hours - **Cooling**: Air cooling to room temperature **Microstructural Features:** - Fine, homogeneous grain structure - Optimized precipitate distribution - Maximum solid solution strengthening - Enhanced intermetallic phase dispersion --- #### **7. Manufacturing Considerations** **Casting Processes:** - Excellent for sand casting of structural components - Suitable for permanent mold casting - Good for investment casting of complex shapes - Recommended pouring temperature: 700-750°C (1292-1382°F) **Machinability:** - Good machining characteristics - Better chip formation than as-cast material - Recommended cutting speeds: 300-600 SFM - Use sharp carbide tools with proper cooling **Joining Methods:** - TIG welding with proper filler wire - Post-weld heat treatment recommended - Adhesive bonding for secondary attachments - Mechanical fastening preferred for primary structure **Surface Protection:** - Chromate conversion coating (e.g., Dow No. 1 or 7) - Anodizing treatments (HAE process) - Electroless nickel plating - Painting and powder coating systems --- **Technical Notes:** 1. T6 treatment provides the highest strength attainable with AM100A alloy 2. Ideal for applications requiring maximum structural efficiency 3. Proper quenching rate is critical to achieve optimal properties 4. Stress relief after machining may be required for critical applications 5. Not recommended for prolonged service above 150°C (300°F) **Disclaimer:** This information is provided for reference purposes only. Actual properties may vary depending on casting method, section size, and foundry practices. Users should verify suitability for specific applications through appropriate testing and consult current material specifications for design and procurement purposes. The heat treatment parameters should be optimized for specific casting configurations and performance requirements.

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 3274 gallon liquid totes Special package is available on request.