Magnesium AM100A-T5, Cast,E FOUR

### **Product Datasheet: Magnesium AM100A-T5 Cast Alloy** **Introduction** Magnesium AM100A-T5 is a precipitation-hardened magnesium casting alloy that has been artificially aged after casting. The T5 temper indicates the material has undergone an artificial aging process without prior solution heat treatment. This treatment significantly improves yield strength and hardness while maintaining good dimensional stability. AM100A-T5 offers an excellent balance of strength, castability, and corrosion resistance for elevated temperature applications. **Key Characteristics** - **Improved Strength**: Artificial aging enhances yield strength and hardness - **Good Elevated Temperature Stability**: Maintains properties at moderate temperatures - **Excellent Castability**: Suitable for complex casting designs - **Good Corrosion Resistance**: When properly surface treated - **Dimensional Stability**: Minimal distortion during aging treatment --- #### **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) | | **Electrical Resistivity** | 120-140 nΩ·m | --- #### **3. Mechanical Properties (T5 Condition)** **Room Temperature Properties:** | Property | Value | |----------|--------| | **Tensile Strength, Ultimate** | 155-185 MPa (22,500-26,800 psi) | | **Tensile Strength, Yield (0.2% Offset)** | 110-130 MPa (16,000-18,800 psi) | | **Elongation** | 1-3% (in 2 inches) | | **Compressive Yield Strength** | 110-130 MPa (16,000-18,800 psi) | | **Hardness, Brinell** | 65-75 HB | | **Shear Strength** | 130-150 MPa (18,800-21,800 psi) | | **Fatigue Strength** | 70-85 MPa (10,000-12,300 psi) | **Elevated Temperature Properties:** - Useful mechanical properties maintained up to 120°C (250°F) - Good creep resistance at moderate temperatures - Stable microstructure up to 150°C (300°F) --- #### **4. International Standards** AM100A-T5 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 - **DIN**: **DIN 1729-2** - Magnesium casting alloys --- #### **5. Product Applications** AM100A-T5 is widely used in applications requiring good strength and stability: **Aerospace Applications:** - Aircraft wheel components - Gearbox housings - Engine accessory cases - Structural brackets **Automotive Applications:** - Transmission cases - Engine brackets - Suspension components - High-performance automotive parts **Industrial Applications:** - Power tool housings - Textile machinery components - Printing equipment parts - Material handling equipment **Electronics Applications:** - Radar bases - Electronic enclosure - Antenna supports --- #### **6. Heat Treatment Specification** **T5 Heat Treatment Process:** - **Artificial Aging**: 215±5°C (419±9°F) for 4-8 hours - **Cooling**: Air cooling to room temperature - **Pre-treatment**: Castings used in as-cast condition before aging **Microstructural Features:** - Precipitated intermetallic phases - Improved grain boundary stability - Enhanced dispersion strengthening --- #### **7. Manufacturing Considerations** **Casting Processes:** - Excellent for sand casting applications - Suitable for permanent mold casting - Good for investment casting of complex shapes **Machinability:** - Good machining characteristics - Better chip formation compared to as-cast condition - Recommended cutting speeds: 300-600 SFM **Joining Methods:** - TIG welding with proper precautions - Resistance spot welding - Adhesive bonding - Mechanical fastening **Surface Protection:** - Chromate conversion coating (e.g., Dow No. 1) - Anodizing treatments (e.g., HAE, Magoxid-Coat) - Electroplating with proper pre-treatment - Painting and powder coating --- **Technical Notes:** 1. T5 treatment provides the best compromise between strength and cost 2. Ideal for castings that cannot tolerate solution treatment distortion 3. Aging time and temperature may be adjusted based on section size 4. Stress relief may be incorporated during aging cycle **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.

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 3272 gallon liquid totes Special package is available on request.