Magnesium AZ63A-T6，UNS M11630; ASTM B 80; SAE J465. ,E FOUR

Magnesium AZ63A-T6 (UNS M11630) Casting Alloy Product Introduction** **Product Description** Magnesium AZ63A-T6 (UNS M11630) is a widely used magnesium casting alloy that offers an excellent combination of strength, ductility, and corrosion resistance. The "T6" temper designation indicates that the alloy has been solution heat-treated and artificially aged, which provides optimal mechanical properties for structural applications. This alloy conforms to both ASTM B80 and SAE J465 standards, making it a preferred choice for high-integrity cast components across various industries. --- #### **1. Chemical Composition (Weight %)** The chemical composition is carefully balanced to achieve the desired mechanical properties and corrosion resistance. | Element | Minimum (%) | Maximum (%) | Key Function | | :--- | :--- | :--- | :--- | | **Aluminum (Al)** | 5.3 | 6.7 | Primary strengthening element, enhances fluidity | | **Zinc (Zn)** | 2.5 | 3.5 | Secondary strengthener, improves corrosion resistance | | **Manganese (Mn)** | 0.15 | 0.50 | Grain refiner, improves corrosion resistance | | **Silicon (Si)** | - | 0.30 | Impurity control | | **Copper (Cu)** | - | 0.25 | Impurity control | | **Iron (Fe)** | - | 0.005 | Impurity control (strictly limited) | | **Nickel (Ni)** | - | 0.010 | Impurity control | | **Other Elements** | - | 0.30 (total) | - | | **Magnesium (Mg)** | **Balance** | | | *Note: The balanced aluminum and zinc content provides optimal strengthening while maintaining good castability.* --- #### **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 (T6 Temper)** The T6 heat treatment provides an excellent balance of strength and ductility. | Property | Typical Value (Sand Cast) | | :--- | :--- | | **Tensile Strength** | 275 MPa (40 ksi) | | **Yield Strength (0.2% Offset)** | 130 MPa (19 ksi) | | **Elongation** | 6 - 10% | | **Compressive Yield Strength** | 130 MPa (19 ksi) | | **Hardness** | 65 - 70 HB | | **Shear Strength** | 180 MPa (26 ksi) | | **Fatigue Strength** | 125 MPa (18 ksi) | *Note: Properties may vary depending on casting method (sand, permanent mold, or die casting) and section size.* --- #### **4. International Standards** AZ63A-T6 is specified in several key international standards. | Standard Organization | Standard Designation | Description | | :--- | :--- | :--- | | **ASTM International** | **ASTM B80** | Standard Specification for Magnesium-Alloy Sand Castings | | **SAE International** | **SAE J465** | Magnesium Alloy Castings | | **UNS** | **M11630** | Unified Numbering System | | **ISO** | **ISO 16220** | Magnesium and magnesium alloys | --- #### **5. Product Applications** AZ63A-T6 is widely used in applications requiring good strength-to-weight ratio and structural integrity. * **Aerospace:** * Aircraft wheel components * Gearbox housings and transmission cases * Engine accessory mounts * Structural brackets and fittings * **Automotive:** * Engine blocks and crankcases * Transmission cases * Suspension components * Steering system parts * **Industrial Equipment:** * Power tool housings * Compressor parts * Pump bodies and impellers * Machinery bases and frames * **Defense Applications:** * Military vehicle components * Weapon system parts * Portable equipment housings --- #### **6. Key Characteristics & Considerations** * **Advantages:** * **Excellent Castability:** Good fluidity and low hot cracking tendency * **Good Corrosion Resistance:** Adequate performance in normal atmospheric conditions * **High Strength-to-Weight Ratio:** Excellent mechanical properties relative to density * **Good Machinability:** Can be easily machined to precise tolerances * **Excellent Damping Capacity:** Superior vibration absorption characteristics * **Heat Treatment (T6):** * **Solution Treatment:** 4-6 hours at 385-425°C (725-795°F) * **Quenching:** Rapid cooling in air or hot water * **Artificial Aging:** 8-16 hours at 175-225°C (350-435°F) * **Considerations:** * **Limited High-Temperature Strength:** Properties degrade above 120°C (250°F) * **Corrosion Protection:** Requires surface protection for severe environments * **Casting Design:** Requires proper gating and risering for sound castings **Summary** **Magnesium AZ63A-T6 (UNS M11630)** is a high-performance casting alloy that provides an optimal balance of mechanical properties, castability, and corrosion resistance. The T6 heat treatment significantly enhances its strength characteristics while maintaining adequate ductility. Compliance with ASTM B80 and SAE J465 standards ensures consistent quality and reliability, making it suitable for critical applications in aerospace, automotive, and industrial sectors where lightweight structural components are essential.

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 3298 gallon liquid totes Special package is available on request.