Magnesium HZ32A-T5, UNS M13320;,E FOUR

Product Datasheet: Magnesium Alloy HZ32A-T5 (UNS M13320)** **A High-Strength, Heat-Resistant Wrought Magnesium Alloy** --- #### **Overview** Magnesium Alloy HZ32A-T5 (UNS M13320) is a high-strength, heat-treatable wrought magnesium alloy renowned for its exceptional stability and strength at elevated temperatures. It was developed primarily for aerospace and racing applications where the classic strength-to-weight ratio of magnesium must be maintained under thermal stress. The "T5" temper signifies that the alloy has been artificially aged after a hot-working process (like extrusion or forging) to achieve its optimal mechanical properties. --- #### **Key Features & Benefits** * **Excellent Elevated Temperature Strength:** Retains a significant portion of its room-temperature strength up to approximately 350°C (660°F). * **Superior Creep Resistance:** Outperforms many other magnesium alloys in applications involving sustained loads at high temperatures. * **Good Castability and Weldability:** Offers good foundry characteristics and can be welded using standard techniques like Gas Tungsten Arc Welding (GTAW/TIG). * **Low Density:** Maintains the inherent lightweight advantage of magnesium (about 35% lighter than aluminum). --- #### **Chemical Composition (Weight %)** The nominal composition of HZ32A alloy is as follows: | Element | Magnesium (Mg) | Thorium (Th) | Zinc (Zn) | Zirconium (Zr) | Others (Total) | | :--- | :--- | :--- | :--- | :--- | :--- | | **Content %** | Balance | 2.5 - 3.5 | 1.7 - 2.5 | 0.45 - 1.0 | ≤ 0.30 | *Note: The presence of Thorium (a low-level radioactive element) imposes specific handling, disposal, and international trade restrictions (e.g., ITAR). This has led to its replacement by thorium-free alloys like WE43 or QE22 in many modern applications.* --- #### **Physical & Mechanical Properties (Typical for T5 Temper)** The following values are representative and can vary based on product form (e.g., casting, extrusion) and section size. | Property | Value | Condition / Note | | :--- | :--- | :--- | | **Density** | 1.81 g/cm³ (0.065 lb/in³) | At 20°C | | **Melting Range** | ~ 635°C (1175°F) | | | **Ultimate Tensile Strength (UTS)** | 240 MPa (35,000 psi) | Room Temperature | | **Tensile Yield Strength (TYS)** | 145 MPa (21,000 psi) | Room Temperature | | **Compressive Yield Strength (CYS)** | 145 MPa (21,000 psi) | Room Temperature | | **Elongation** | 4% | In 2 inches (50 mm) | | **Modulus of Elasticity** | 45 GPa (6.5 x 10⁶ psi) | | | **Hardness** | 60 HB | | **Elevated Temperature Performance:** HZ32A is designed for high-temperature service. It typically retains a tensile yield strength of over 110 MPa (16,000 psi) at 315°C (600°F). --- #### **International Standards & Cross-References** HZ32A is covered by several aerospace and general material standards. * **ASTM:** **ASTM B80** - Specification for Magnesium-Alloy Sand Castings. * **AMS:** **AMS 4425** - Castings, Magnesium Alloy, Sand 3.2Th-2.1Zn-0.7Zr (HZ32A-T5). * **UNS:** **M13320** * **Common Name:** **HZ32A-T5** --- #### **Product Applications** HZ32A-T5 is primarily used in high-performance applications where its high-temperature capabilities are critical. * **Aerospace & Defense:** * Jet engine compressor housings and casings * Gearboxes and transmission housings * Missile and rocket components * Engine access doors and canopy frames * **High-Performance Automotive:** * Engine blocks, pistons, and cylinder heads for racing applications * Components for turbochargers and superchargers * **Specialized Industrial Equipment:** * Components for machinery operating in high-temperature environments. --- #### **Processing & Handling** * **Heat Treatment:** The T5 temper involves artificial aging at a specific temperature to precipitate strengthening phases within the microstructure. * **Fabrication:** It is suitable for sand casting and can be machined to a high-quality finish. * **Corrosion Protection:** Requires standard magnesium protection schemes, such as chemical conversion coatings and paint systems, for service in corrosive environments. * **Safety & Compliance:** The thorium content requires compliance with nuclear material handling, transportation, and disposal regulations. --- **Disclaimer:** This information is for reference purposes only. Properties can vary based on manufacturing process and product form. It is essential to consult the relevant material specifications and conduct thorough testing for your specific application. Due to the thorium content, regulatory compliance is mandatory.

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 3343 gallon liquid totes Special package is available on request.