Magnesium ZK60A-T5, Extruded，UNS M16600;,E FOUR

### **Product Datasheet: Magnesium ZK60A-T5, Extruded (UNS M16600)** **Ultra-High-Strength Extruded Magnesium Alloy** --- #### **1. Overview** Magnesium ZK60A-T5 (UNS M16600) is an ultra-high-strength extruded magnesium alloy that represents the pinnacle of the magnesium-zinc-zirconium alloy system. Through optimized zinc content and zirconium grain refinement, combined with T5 artificial aging treatment, this alloy achieves the highest strength levels available in commercial magnesium wrought products. The extrusion process produces uniform, fine-grained microstructures ideal for critical structural applications where maximum strength-to-weight ratio is essential. --- #### **2. Key Features & Advantages** - **Ultra-High Strength:** Highest strength among commercial magnesium wrought alloys - **Excellent Strength-to-Weight Ratio:** Superior to most aluminum alloys - **Fine Grain Structure:** Zirconium ensures ASTM 10-12 grain size in extrusions - **Good Corrosion Resistance:** Enhanced performance with proper surface protection - **Excellent Fatigue Performance:** Superior fatigue strength for dynamic applications - **Good Workability:** Can be extruded into complex structural shapes - **Age-Hardenable:** T5 treatment provides optimal strength enhancement --- #### **3. Chemical Composition (Weight %)** | Element | Magnesium (Balance) | Zinc | Zirconium | Manganese (max) | Silicon (max) | Other Elements (max) | |---------------|---------------------|--------------|--------------|-----------------|---------------|---------------------| | **Content (%)** | - | 4.8-6.2 | 0.45-1.0 | 0.15 | 0.10 | 0.30 total | *Note: The high zinc content (typically 5.5% nominal) provides maximum solid solution strengthening, while zirconium ensures exceptional grain refinement, creating the foundation for ultra-high strength properties after T5 aging.* --- #### **4. Typical Physical & Mechanical Properties (T5 Temper - Extruded)** **Physical Properties:** | Property | Value | |---------------------------|------------------------------| | **Density** | 1.83 g/cm³ (0.0661 lb/in³) | | **Melting Range** | 520-635°C (968-1175°F) | | **Thermal Conductivity** | 110 W/m·K | | **Specific Heat Capacity**| 1000 J/kg·K | | **Coefficient of Thermal Expansion** | 25.5 × 10⁻⁶/°C | | **Electrical Resistivity**| 9.5 μΩ·cm | **Mechanical Properties (Extruded & T5 Aged):** | Property | Minimum | Typical | Maximum | |---------------------------|----------------|----------------|----------------| | **Ultimate Tensile Strength** | 310 MPa (45 ksi) | 325 MPa (47 ksi) | 350 MPa (51 ksi) | | **Tensile Yield Strength**| 215 MPa (31 ksi) | 250 MPa (36 ksi) | 285 MPa (41 ksi) | | **Elongation** | 5% | 11% | 16% | | **Compressive Yield Strength** | 215 MPa (31 ksi) | 245 MPa (36 ksi) | 275 MPa (40 ksi) | | **Shear Strength** | 180 MPa (26 ksi) | 195 MPa (28 ksi) | 210 MPa (30 ksi) | | **Fatigue Strength** | 130 MPa (19 ksi) | 145 MPa (21 ksi) | 160 MPa (23 ksi) | | **Elastic Modulus** | 45 GPa (6.5×10⁶ psi) | 45 GPa (6.5×10⁶ psi) | 45 GPa (6.5×10⁶ psi) | | **Hardness** | 75 HB | 82 HB | 90 HB | | **Bearing Strength** | 480 MPa (70 ksi) | 515 MPa (75 ksi) | 550 MPa (80 ksi) | | **Bearing Yield Strength**| 345 MPa (50 ksi) | 380 MPa (55 ksi) | 415 MPa (60 ksi) | --- #### **5. International Standards** ZK60A-T5 Extruded products conform to: - **ASTM B107/B107M:** Standard Specification for Magnesium-Alloy Extruded Bars, Rods, Profiles, Tubes, and Wire - **AMS 4356:** Aerospace Material Specification for Extruded Bars and Shapes - **UNS M16600:** Unified Numbering System designation - **ISO 3116:** Wrought magnesium and magnesium alloys - **DIN 9719:** Magnesium wrought alloys - Chemical composition - **GB/T 5153:** Chinese National Standard for Wrought Magnesium Alloys --- #### **6. Applications** **Aerospace & Defense:** - Aircraft landing gear components - Missile airframes and structural members - Helicopter rotor hubs and components - Satellite structural frames and brackets - Aircraft wing spar caps - Engine mounting structures **High-Performance Automotive:** - Racing wheel rims - Sports car suspension components - High-performance brake calipers - Motorcycle frames and swingarms - Bicycle high-stress components **Industrial Equipment:** - Robotics arm structures - High-speed automation equipment - Material handling system components - Precision machinery frames - Portable equipment structural members **Sporting Goods:** - Professional bicycle frames - Mountaineering equipment - High-performance tennis rackets - Golf club heads and shafts - Archery equipment components **Special Applications:** - Nuclear fuel handling tools - Aerospace tooling and fixtures - Portable military bridges - Emergency response equipment --- #### **7. Extrusion & Processing Parameters** **Extrusion Conditions:** - **Billet Temperature:** 320-380°C (608-716°F) - **Container Temperature:** 300-360°C (572-680°F) - **Die Temperature:** 330-390°C (626-734°F) - **Extrusion Ratio:** 15:1 to 40:1 (optimal 20:1-30:1) - **Ram Speed:** 1-8 m/min depending on complexity - **Quenching:** Air cooling after extrusion **Heat Treatment (T5):** - **Artificial Aging:** 130-150°C (266-302°F) for 24-48 hours - **Temperature Control:** ±3°C (±5°F) critical for consistency - **Atmosphere:** Air atmosphere acceptable - **Documentation:** Full heat treat records required **Machining Characteristics:** - **Machinability Rating:** Excellent (comparable to brass) - **Cutting Speed:** 300-600 m/min recommended - **Surface Finish:** 0.4-1.6 μm Ra achievable - **Tool Life:** 2-3x longer than steel machining - **Chip Characteristics:** Small, easily managed chips **Joining & Fabrication:** - **TIG Welding:** Good with ZK60A filler wire - **Friction Stir Welding:** Excellent results - **Adhesive Bonding:** Good with proper surface preparation - **Mechanical Fastening:** Excellent bearing properties --- #### **8. Quality Assurance & Specifications** - **Dimensional Tolerances:** Per ASTM B107 requirements - **Surface Quality:** Smooth, defect-free extruded surface - **Straightness:** 1.5 mm/m for commercial grade - **Grain Size:** ASTM 10-12 typical - **Ultrasonic Testing:** Available for critical applications - **Certification:** Full traceability with mill certification --- **Disclaimer** This technical data represents typical properties for properly processed ZK60A-T5 extrusions. Actual properties may vary based on extrusion parameters, section size, and specific aging conditions. This alloy represents the highest strength level available in commercial magnesium wrought products but requires careful processing to achieve optimal properties. 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 strictly 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 3372 gallon liquid totes Special package is available on request.