Magnesium ZK40A-T5, Extruded，UNS M16400,E FOUR

### **Product Datasheet: Magnesium ZK40A-T5, Extruded (UNS M16400)** **High-Strength Extruded Magnesium Alloy** --- #### **1. Overview** Magnesium ZK40A-T5 (UNS M16400) is a high-strength extruded magnesium alloy that achieves enhanced mechanical properties through a combination of zinc and zirconium additions, followed by T5 artificial aging treatment. This alloy is specifically designed for extrusion processes, producing profiles, rods, bars, and structural shapes with excellent strength-to-weight ratio, good ductility, and superior surface finish. The T5 temper provides optimal mechanical properties for structural applications requiring lightweight and reliability. --- #### **2. Key Features & Advantages** - **High Strength-to-Weight Ratio:** Excellent mechanical properties with minimal weight - **Fine Grain Structure:** Zirconium ensures uniform grain refinement throughout extrusions - **Good Corrosion Resistance:** Superior performance compared to conventional magnesium alloys - **Excellent Extrudability:** Can be extruded into complex profiles with tight tolerances - **Age-Hardenable:** T5 treatment enhances strength while maintaining adequate ductility - **Good Weldability:** Suitable for TIG and MIG welding processes - **Excellent Machinability:** High-speed machining capability with superior surface finish --- #### **3. Chemical Composition (Weight %)** | Element | Magnesium (Balance) | Zinc | Zirconium | Manganese (max) | Silicon (max) | Other Elements (max) | |---------------|---------------------|--------------|--------------|-----------------|---------------|---------------------| | **Content (%)** | - | 3.5-4.5 | 0.45-1.0 | 0.15 | 0.10 | 0.30 total | *Note: The optimized zinc content (typically 4.0% nominal) provides significant solid solution strengthening, while zirconium ensures fine, uniform grain structure throughout the extruded sections, contributing to consistent mechanical properties.* --- #### **4. Typical Physical & Mechanical Properties (T5 Temper - Extruded)** **Physical Properties:** | Property | Value | |---------------------------|------------------------------| | **Density** | 1.80 g/cm³ (0.065 lb/in³) | | **Melting Range** | 620-645°C (1148-1193°F) | | **Thermal Conductivity** | 115 W/m·K | | **Specific Heat Capacity**| 1015 J/kg·K | | **Coefficient of Thermal Expansion** | 25.9 × 10⁻⁶/°C | | **Electrical Resistivity**| 8.2 μΩ·cm | **Mechanical Properties (Typical for Extruded Products):** | Property | Value Range | Typical Average | |---------------------------|---------------------------|-------------------------| | **Ultimate Tensile Strength** | 275-315 MPa (40-46 ksi) | 295 MPa (43 ksi) | | **Tensile Yield Strength**| 200-240 MPa (29-35 ksi) | 220 MPa (32 ksi) | | **Elongation** | 8-14% | 11% | | **Compressive Yield Strength** | 190-230 MPa (28-33 ksi) | 210 MPa (30 ksi) | | **Shear Strength** | 165-195 MPa (24-28 ksi) | 180 MPa (26 ksi) | | **Fatigue Strength** | 130-150 MPa (19-22 ksi) | 140 MPa (20 ksi) | | **Elastic Modulus** | 45 GPa (6.5×10⁶ psi) | 45 GPa (6.5×10⁶ psi) | | **Hardness** | 75-85 HB | 80 HB | | **Bearing Strength** | 415-470 MPa (60-68 ksi) | 445 MPa (65 ksi) | --- #### **5. International Standards** ZK40A-T5 Extruded products conform to the following specifications: - **ASTM B107/B107M:** Standard Specification for Magnesium-Alloy Extruded Bars, Rods, Profiles, Tubes, and Wire - **UNS M16400:** Unified Numbering System designation - **AMS 4360:** Aerospace Material Specification for Extruded Bars and Shapes - **ISO 3116:** Wrought magnesium and magnesium alloys - **ASTM B90/B90M:** For related sheet and plate products (reference) --- #### **6. Applications** **Aerospace & Defense:** - Aircraft structural longerons and stringers - Missile body frames and structural members - Helicopter transmission housings - Equipment mounting rails and brackets - Satellite structural components - Radar antenna supports **Transportation & Automotive:** - Automotive seat frames and structures - Racing vehicle chassis components - Motorcycle frames and swing arms - Bicycle frame tubes and components - Truck body structural members **Industrial Equipment:** - Material handling equipment frames - Robotic arm components - Machinery structural supports - Conveyor system components - Portable equipment frameworks **Consumer & Electronics:** - Professional sports equipment - Camera and optical equipment frames - Portable medical device structures - High-end audio equipment chassis - Laptop computer internal frames **Specialty Applications:** - Nuclear fuel handling equipment - Portable bridge components - Emergency response equipment - Military portable structures --- #### **7. Extrusion & Processing Parameters** **Extrusion Conditions:** - **Billet Temperature:** 340-400°C (644-752°F) - **Container Temperature:** 320-380°C (608-716°F) - **Die Temperature:** 350-420°C (662-788°F) - **Extrusion Ratio:** 10:1 to 30:1 typical - **Ram Speed:** 1-10 m/min depending on section complexity **Heat Treatment (T5):** - **Artificial Aging:** 175-200°C (347-392°F) for 16-24 hours - **Cooling Method:** Air cooling - **Temperature Control:** ±5°C (±9°F) for consistent results **Machining Characteristics:** - **Machinability Rating:** Excellent (comparable to free-cutting brass) - **Cutting Speed:** High-speed operations possible - **Surface Finish:** Very good to excellent - **Chip Formation:** Small, broken chips - **Coolant Requirements:** Recommended for optimal results **Joining Methods:** - **TIG Welding:** Excellent with proper filler material - **MIG Welding:** Suitable for production welding - **Adhesive Bonding:** Good compatibility with structural adhesives - **Mechanical Fastening:** Good bearing strength properties --- #### **8. Quality Assurance & Specifications** - **Dimensional Tolerances:** Per ASTM B107 requirements - **Surface Quality:** Smooth, uniform extruded surface - **Straightness:** Commercial and precision grades available - **Grain Size:** Typically ASTM 8-10 for extruded products - **Certification:** Mill certification to specified requirements - **Testing:** Tensile, hardness, and chemical analysis available --- **Disclaimer** This technical data is for reference purposes only. Actual properties may vary based on extrusion parameters, section size, and specific aging conditions. 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 be followed, particularly during machining operations where fine chips can present fire hazards.

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 3370 gallon liquid totes Special package is available on request.