Magnesium AZ63A-T5，AMS 4424; ASTM B 80; SAE J465.,E FOUR

Magnesium AZ63A-T5 Casting Alloy (AMS 4424; ASTM B80; SAE J465)** **Product Description** Magnesium AZ63A-T5 is an artificially aged sand casting alloy that offers improved strength and hardness compared to the as-cast condition. The "T5" temper designation indicates the material has been artificially aged after casting without prior solution heat treatment. This alloy meets the requirements of AMS 4424, ASTM B80, and SAE J465 standards, providing an optimal balance of strength and dimensional stability for various engineering applications. --- #### **1. Chemical Composition (Weight %)** | Element | Minimum (%) | Maximum (%) | | :--- | :--- | :--- | | **Aluminum (Al)** | 5.3 | 6.7 | | **Zinc (Zn)** | 2.5 | 3.5 | | **Manganese (Mn)** | 0.15 | 0.50 | | **Silicon (Si)** | - | 0.30 | | **Copper (Cu)** | - | 0.25 | | **Iron (Fe)** | - | 0.005 | | **Nickel (Ni)** | - | 0.010 | | **Other Elements** | - | 0.30 (total) | | **Magnesium (Mg)** | **Balance** | --- #### **2. Physical Properties** | Property | Value | | :--- | :--- | | **Density** | 1.83 g/cm³ (0.066 lb/in³) | | **Melting Range** | 455 - 610°C (851 - 1130°F) | | **Thermal Conductivity** | 65 W/m·K | | **Coefficient of Thermal Expansion** | 26.0 μm/m·°C (20-100°C) | | **Modulus of Elasticity** | 45 GPa (6.5 × 10⁶ psi) | | **Specific Heat Capacity** | 1050 J/kg·K | | **Electrical Resistivity** | 140 nΩ·m | --- #### **3. Mechanical Properties (T5 Condition)** | Property | Typical Value | | :--- | :--- | | **Tensile Strength** | 230 MPa (33 ksi) | | **Yield Strength (0.2% Offset)** | 110 MPa (16 ksi) | | **Elongation** | 5% | | **Hardness** | 65 HB | | **Compressive Yield Strength** | 110 MPa (16 ksi) | | **Shear Strength** | 145 MPa (21 ksi) | | **Fatigue Strength** | 97 MPa (14 ksi) | --- #### **4. International Standards** | Standard | Title | | :--- | :--- | | **AMS 4424** | Magnesium Alloy Castings, Sand 6.5Al-3Zn-0.2Mn (AZ63A-T5) | | **ASTM B80** | Standard Specification for Magnesium-Alloy Sand Castings | | **SAE J465** | Magnesium Alloys (Cast and Wrought) | --- #### **5. Heat Treatment Specification** * **Artificial Aging:** 175-225°C (350-435°F) for 8-16 hours * **Cooling:** Air cool after aging * **No solution heat treatment applied** * **Minimal distortion** compared to T6 treatment --- #### **6. Product Applications** * **Aerospace Components** * Aircraft wheel components * Gearbox housings * Engine accessory mounts * Structural brackets and fittings * **Automotive Parts** * Transmission cases * Engine brackets * Suspension components * Steering system parts * **Industrial Equipment** * Pump housings and impellers * Compressor components * Machinery bases and frames * High-strength structural parts --- #### **7. Key Characteristics** * **Advantages:** * Improved strength and hardness over F and T4 tempers * Good dimensional stability * Reduced residual stresses * Enhanced wear resistance * Cost-effective compared to T6 treatment * Good machinability * **Limitations:** * Lower ductility compared to T4 temper * Not suitable for extreme dynamic loading * Requires corrosion protection in severe environments * Limited to moderate temperature applications * **Manufacturing Notes:** * Ideal for sand castings requiring moderate strength * Minimal distortion during heat treatment * Good pressure tightness * Suitable for complex geometries **Summary** Magnesium AZ63A-T5 provides an excellent balance of mechanical properties and cost-effectiveness for medium-strength applications. The artificial aging treatment (T5 condition) significantly enhances strength and hardness while maintaining adequate ductility. Compliance with AMS 4424, ASTM B80, and SAE J465 standards ensures consistent quality and performance for aerospace, automotive, and industrial applications. This temper offers a practical solution for components requiring improved mechanical properties without the complexity and cost of full T6 heat treatment.

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 3302 gallon liquid totes Special package is available on request.