Magnesium ZK31-T5,E FOUR

### **Product Datasheet: Magnesium ZK31-T5** **High-Strength Wrought Magnesium Alloy** --- #### **1. Overview** Magnesium ZK31-T5 is a high-strength wrought magnesium alloy that combines zinc and zirconium to achieve enhanced mechanical properties through T5 heat treatment (artificially aged after working). This alloy offers an excellent balance of strength, ductility, and corrosion resistance, making it suitable for applications requiring lightweight structural components with good performance characteristics. The T5 temper provides improved strength while maintaining adequate formability and machinability. --- #### **2. Key Features & Advantages** - **High Strength-to-Weight Ratio:** Excellent mechanical properties with low density - **Fine Grain Structure:** Zirconium ensures effective grain refinement - **Good Corrosion Resistance:** Superior performance in various environments - **Excellent Machinability:** High-speed machining capability with good surface finish - **Good Weldability:** Suitable for TIG and other fusion welding processes - **Age-Hardenable:** Responds well to artificial aging treatment --- #### **3. Chemical Composition (Weight %)** | Element | Magnesium (Balance) | Zinc | Zirconium | Manganese (max) | Silicon (max) | Other Elements (max) | |---------------|---------------------|--------------|--------------|-----------------|---------------|---------------------| | **Content (%)** | - | 2.5-3.5 | 0.45-1.0 | 0.15 | 0.10 | 0.30 total | *Note: The zinc content provides solid solution strengthening, while zirconium acts as a grain refiner, contributing to both strength and ductility improvements.* --- #### **4. Typical Physical & Mechanical Properties (T5 Temper)** **Physical Properties:** | Property | Value | |---------------------------|------------------------------| | **Density** | 1.79 g/cm³ (0.0646 lb/in³) | | **Melting Range** | 625-650°C (1157-1202°F) | | **Thermal Conductivity** | 118 W/m·K | | **Specific Heat Capacity**| 1020 J/kg·K | | **Coefficient of Thermal Expansion** | 25.8 × 10⁻⁶/°C | **Mechanical Properties (Typical):** | Property | Extruded Products | Sheet/Plate | |---------------------------|--------------------------|------------------------| | **Ultimate Tensile Strength** | 270-310 MPa (39-45 ksi) | 255-290 MPa (37-42 ksi) | | **Tensile Yield Strength**| 195-230 MPa (28-33 ksi) | 180-210 MPa (26-30 ksi) | | **Elongation** | 8-14% | 7-12% | | **Compressive Yield Strength** | 185-220 MPa (27-32 ksi) | 170-200 MPa (25-29 ksi) | | **Shear Strength** | 160-185 MPa (23-27 ksi) | 150-175 MPa (22-25 ksi) | | **Fatigue Strength** | 125-145 MPa (18-21 ksi) | 115-135 MPa (17-20 ksi) | | **Elastic Modulus** | 45 GPa (6.5×10⁶ psi) | 45 GPa (6.5×10⁶ psi) | | **Hardness** | 70-80 HB | 65-75 HB | --- #### **5. International Standards** ZK31-T5 is covered by the following specifications: - **ASTM B107/B107M:** Specification for Magnesium-Alloy Extruded Bars, Rods, Profiles, Tubes, and Wire - **ASTM B90/B90M:** Specification for Magnesium-Alloy Sheet and Plate - **AMS 4355:** Aerospace Material Specification for Sheet and Plate (when applicable) - **ISO 3116:** Wrought magnesium and magnesium alloys --- #### **6. Applications** **Aerospace & Defense:** - Aircraft structural components - Missile and rocket components - Helicopter transmission parts - Equipment mounting brackets - Radar and electronic housing components **Transportation & Automotive:** - Automotive chassis components - Racing vehicle parts - Bicycle frames and components - Motorcycle components **Industrial Equipment:** - Power tool housings - Material handling equipment components - Machinery structural parts - Robot arms and components **Consumer Products:** - Sports equipment (golf clubs, tennis rackets) - Portable electronic device frames - Camera and optical equipment bodies - Professional audio equipment components --- #### **7. Processing & Fabrication** **Heat Treatment (T5):** - **Artificial Aging:** 175-200°C (347-392°F) for 16-24 hours - **Cooling:** Air cooling after aging treatment **Hot Working Parameters:** - **Extrusion Temperature:** 330-410°C (626-770°F) - **Rolling Temperature:** 320-430°C (608-806°F) - **Forging Temperature:** 350-450°C (662-842°F) **Machining Characteristics:** - Excellent machinability with proper cooling - High cutting speeds achievable - Good surface finish obtainable - Requires appropriate chip management **Joining Methods:** - **TIG Welding:** Recommended with compatible filler rods - **MIG Welding:** Suitable for thicker sections - **Resistance Welding:** Applicable for sheet materials - **Adhesive Bonding:** Good results with structural adhesives **Surface Treatment:** - Chemical conversion coatings - Anodizing treatments - Painting and powder coating --- #### **8. Special Considerations** - **Temperature Limit:** Maximum service temperature 150°C (302°F) - **Corrosion Protection:** Requires appropriate coatings for harsh environments - **Aging Control:** Critical for achieving consistent mechanical properties - **Grain Size:** Important for optimal performance - **Quality Assurance:** Standard testing methods applicable --- **Disclaimer** This technical data is for informational purposes only. Properties may vary depending on manufacturing process, product form, and heat treatment parameters. Users should conduct appropriate testing to verify suitability for specific applications and consult relevant material specifications before use. Proper safety precautions for magnesium processing must always be followed.

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 3368 gallon liquid totes Special package is available on request.