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

### **Product Datasheet: Magnesium ZK60A-T5, Forgings (UNS M16600)** **High-Strength Forged Magnesium Alloy with Superior Mechanical Properties** --- #### **1. Overview** Magnesium ZK60A-T5 (UNS M16600) is a high-strength forged magnesium alloy that achieves exceptional mechanical properties through a combination of zinc and zirconium additions, followed by T5 artificial aging treatment. The forging process produces a fine-grained, directional microstructure that provides superior mechanical properties compared to cast products. This alloy offers one of the highest strength-to-weight ratios among commercially available magnesium alloys, making it ideal for critical aerospace, defense, and high-performance automotive applications. --- #### **2. Key Features & Advantages** - **Exceptional Strength-to-Weight Ratio:** Superior mechanical properties with minimal weight - **Directional Strength Characteristics:** Optimized grain flow from forging process - **Excellent Fatigue Resistance:** Enhanced performance under dynamic loading conditions - **Good Corrosion Resistance:** Meets aerospace and military specifications - **Superior Structural Integrity:** Reduced porosity and improved reliability vs. castings - **Age-Hardenable:** T5 treatment provides optimal strength enhancement - **Proven Performance:** Extensive use in critical aerospace components --- #### **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 provides substantial solid solution strengthening, while zirconium ensures fine grain structure through the forging process and subsequent heat treatment, creating optimal conditions for T5 aging response.* --- #### **4. Typical Physical & Mechanical Properties (T5 Temper - Forgings)** **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 (Forged & T5 Aged):** | Property | Longitudinal Direction | Transverse Direction | |---------------------------|--------------------------|-------------------------| | **Ultimate Tensile Strength** | 305-345 MPa (44-50 ksi) | 290-330 MPa (42-48 ksi) | | **Tensile Yield Strength**| 225-265 MPa (33-38 ksi) | 210-250 MPa (30-36 ksi) | | **Elongation** | 10-16% | 8-14% | | **Compressive Yield Strength** | 215-255 MPa (31-37 ksi) | 200-240 MPa (29-35 ksi) | | **Shear Strength** | 185-225 MPa (27-33 ksi) | 175-215 MPa (25-31 ksi) | | **Fatigue Strength** | 140-170 MPa (20-25 ksi) | 130-160 MPa (19-23 ksi) | | **Elastic Modulus** | 45 GPa (6.5×10⁶ psi) | 45 GPa (6.5×10⁶ psi) | | **Hardness** | 80-90 HB | 75-85 HB | | **Impact Toughness** | 9-13 J | 8-12 J | | **Bearing Strength** | 500-580 MPa (73-84 ksi) | 480-560 MPa (70-81 ksi) | --- #### **5. International Standards** ZK60A-T5 Forgings conform to the following specifications: - **ASTM B91:** Standard Specification for Magnesium-Alloy Forgings - **AMS 4364:** Aerospace Material Specification for Magnesium Alloy Forgings - **UNS M16600:** Unified Numbering System designation - **ISO 3116:** Wrought magnesium and magnesium alloys - **MIL-M-6854:** Military Specification for Magnesium Alloy Forgings - **Customer-Specific Forging Specifications** --- #### **6. Applications** **Aerospace & Defense:** - Aircraft landing gear components - Helicopter rotor hubs and fittings - Missile body sections and control surfaces - Engine mounting brackets and supports - Wing spar attachments and fittings - Satellite structural components **Military Applications:** - Weapon system structural components - Armored vehicle parts - Portable equipment structural members - Military aircraft critical components **High-Performance Automotive:** - Racing suspension components - High-performance brake calipers - Motorcycle frames and triple clamps - Sports car structural members - Transmission and drivetrain components **Industrial Equipment:** - High-speed robotics components - Precision machinery structural parts - Material handling equipment critical components - Specialized tooling and fixtures - Press and molding equipment components --- #### **7. Forging & Processing Parameters** **Forging Conditions:** - **Billet Temperature:** 350-430°C (662-806°F) - **Die Temperature:** 260-320°C (500-608°F) - **Forging Pressure:** 50-120 MPa (7-17 ksi) - **Strain Rates:** Moderate for optimal grain refinement - **Draft Angles:** 3-5° recommended **Heat Treatment (T5):** - **Artificial Aging:** 130-150°C (266-302°F) for 24-48 hours - **Temperature Control:** ±3°C (±5°F) critical for consistency - **Cooling Method:** Air cooling - **Atmosphere:** Air atmosphere acceptable **Machining Characteristics:** - **Machinability Rating:** Excellent - **Cutting Speed:** 300-600 m/min recommended - **Surface Finish:** 0.4-1.6 μm Ra achievable - **Tool Life:** Extended compared to steel machining - **Chip Characteristics:** Small, easily managed chips **Quality Control Requirements:** - **Ultrasonic Inspection:** Per required quality levels - **Dye Penetrant Testing:** For surface defect detection - **Mechanical Testing:** From forging extensions or coupons - **Microstructural Examination:** Grain size and flow verification --- #### **8. Design & Manufacturing Considerations** - **Parting Line Selection:** Critical for grain flow optimization - **Flash Design:** Proper flash land geometry important - **Fillet Radii:** Minimum 5 mm for stress reduction - **Wall Thickness:** Uniform sections preferred - **Grain Direction:** Align with primary stress directions - **Quality Documentation:** Full traceability for critical applications --- **Disclaimer** This technical data represents typical properties for properly processed ZK60A-T5 forgings. Actual properties may vary depending on forging design, process parameters, and specific aging conditions. This alloy represents one of the highest strength levels available in magnesium forgings and 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 throughout manufacturing operations.

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 3375 gallon liquid totes Special package is available on request.