Magnesium AZ63 T1 Cast Alloy (UNS M11630)，UNS M11630，Mg-6Al-3Zn-0.3Si,E FOUR

Magnesium AZ63A-T1 Cast Alloy (UNS M11630) Product Introduction** **Product Description** Magnesium AZ63A-T1 (UNS M11630) is a widely used magnesium casting alloy supplied in the artificially aged condition. The "T1" temper indicates that the castings have been artificially aged after casting to improve mechanical properties. With its nominal composition of Mg-6Al-3Zn-0.3Si, this alloy offers a good balance of strength, castability, and corrosion resistance, making it suitable for various industrial applications. --- #### **1. Chemical Composition (Weight %)** The chemical composition is optimized for casting performance and mechanical properties. | Element | Minimum (%) | Maximum (%) | Key Function | | :--- | :--- | :--- | :--- | | **Aluminum (Al)** | 5.3 | 6.7 | Primary strengthener, improves fluidity | | **Zinc (Zn)** | 2.5 | 3.5 | Enhances strength and corrosion resistance | | **Manganese (Mn)** | 0.15 | 0.50 | Grain refiner, improves corrosion resistance | | **Silicon (Si)** | 0.20 | 0.50 | Improves fluidity and castability | | **Copper (Cu)** | - | 0.25 | Impurity control | | **Iron (Fe)** | - | 0.005 | Impurity control | | **Nickel (Ni)** | - | 0.010 | Impurity control | | **Other Elements** | - | 0.30 (total) | - | | **Magnesium (Mg)** | **Balance** | | | *Note: The silicon content (0.20-0.50%) is higher than in some other magnesium alloys, which significantly improves casting fluidity.* --- #### **2. Physical Properties** | Property | Value / Description | Condition | | :--- | :--- | :--- | | **Density** | 1.83 g/cm³ (0.066 lb/in³) | At 20°C | | **Melting Point** | ~ 455 - 610 °C (851 - 1130 °F) | - | | **Thermal Conductivity** | 65 W/m·K | At 25°C | | **Coefficient of Thermal Expansion** | 26.0 μm/m·°C | 20 - 100°C | | **Electrical Resistivity** | 140 nΩ·m | At 20°C | | **Modulus of Elasticity** | 45 GPa (6.5 × 10⁶ psi) | - | | **Shear Modulus** | 17 GPa (2.5 × 10⁶ psi) | - | | **Poisson's Ratio** | 0.35 | - | --- #### **3. Mechanical Properties (T1 Temper)** The T1 temper provides improved strength through artificial aging while maintaining good ductility. | Property | Typical Value (Sand Cast) | | :--- | :--- | | **Tensile Strength** | 220 MPa (32 ksi) | | **Yield Strength (0.2% Offset)** | 110 MPa (16 ksi) | | **Elongation** | 6% | | **Compressive Yield Strength** | 110 MPa (16 ksi) | | **Hardness** | 55 - 60 HB | | **Shear Strength** | 145 MPa (21 ksi) | | **Fatigue Strength** | 97 MPa (14 ksi) | *Note: T1 temper involves artificial aging only, without prior solution heat treatment, resulting in lower strength but better dimensional stability compared to T6 temper.* --- #### **4. International Standards** AZ63A-T1 is covered by major international standards for magnesium castings. | Standard Organization | Standard Designation | | :--- | :--- | | **ASTM International** | **ASTM B80** (Magnesium-Alloy Sand Castings) | | **ASTM International** | **ASTM B94** (Magnesium-Alloy Die Castings) | | **SAE International** | **SAE J465** (Magnesium Alloy Castings) | | **UNS** | **M11630** | | **ISO** | **ISO 16220** (Magnesium and magnesium alloys) | --- #### **5. Product Applications** AZ63A-T1 is commonly used in applications requiring good castability and moderate strength. * **Automotive Industry:** * Transmission cases and housings * Engine brackets and mounts * Intake manifolds * Wheel components * **Industrial Equipment:** * Pump housings and impellers * Compressor components * Machinery bases and frames * Material handling equipment parts * **Aerospace Components:** * Non-critical structural brackets * Accessory housings * Instrument cases * **Consumer Products:** * Power tool housings * Outdoor equipment components * Sporting goods --- #### **6. Key Characteristics & Considerations** * **Advantages:** * **Excellent Castability:** Superior fluidity due to aluminum and silicon content * **Good Pressure Tightness:** Suitable for pressure-containing applications * **Moderate Strength:** Adequate for many structural applications * **Good Machinability:** Easy to machine with excellent surface finish * **Cost-Effective:** Lower cost than T6 heat treatment * **Heat Treatment (T1):** * **Artificial Aging:** 8-16 hours at 175-225°C (350-435°F) * **No solution heat treatment required** * **Minimal distortion** compared to T6 treatment * **Considerations:** * **Lower Strength:** Not suitable for high-stress applications requiring T6 properties * **Corrosion Protection:** Requires coatings for severe environments * **Limited High-Temperature Use:** Maximum service temperature ~120°C (250°F) * **Casting Design:** Requires proper feeding and gating systems **Summary** **Magnesium AZ63A-T1 (UNS M11630)** is a versatile casting alloy that provides a good combination of castability, mechanical properties, and cost-effectiveness. The T1 temper offers improved strength over the as-cast condition while maintaining dimensional stability and reducing manufacturing costs compared to full T6 heat treatment. Its compliance with ASTM B80, ASTM B94, and SAE J465 standards ensures consistent quality for automotive, industrial, and general engineering applications where lightweight cast components are required.

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 3299 gallon liquid totes Special package is available on request.