Magnesium ZK51A-T5, Cast，UNS M16510; Mg; AMS 4443; ASTM B 80; SAE J465; Old SAE 509 (Ingot UNS M16511),E FOUR

### **Product Datasheet: Magnesium ZK51A-T5, Cast (UNS M16510)** **High-Strength Sand Casting Magnesium Alloy** --- #### **1. Overview** Magnesium ZK51A-T5 (UNS M16510) is a high-strength sand casting alloy that combines zinc and zirconium to achieve enhanced mechanical properties through T5 artificial aging treatment. This alloy conforms to AMS 4443, ASTM B80, and SAE J465 specifications, offering an excellent balance of tensile strength, yield strength, and corrosion resistance for critical aerospace and industrial applications. The carefully controlled composition produces castings with reliable performance characteristics and good structural integrity. --- #### **2. Key Features & Advantages** - **High Strength-to-Weight Ratio:** Superior mechanical properties with minimal weight penalty - **Excellent Castability:** Produces sound castings with minimal porosity - **Fine Grain Structure:** Zirconium provides effective grain refinement - **Good Corrosion Resistance:** Enhanced environmental performance - **Age-Hardenable:** T5 treatment optimizes mechanical properties - **Pressure Tight:** Suitable for hydraulic and pneumatic applications - **Proven Reliability:** Extensive history in aerospace applications --- #### **3. Chemical Composition (Weight %)** As specified in AMS 4443, ASTM B80, and SAE J465: | Element | Magnesium (Balance) | Zinc | Zirconium | Manganese (max) | Silicon (max) | Other Elements (max) | |---------------|---------------------|--------------|--------------|-----------------|---------------|---------------------| | **Content (%)** | - | 3.5-5.0 | 0.45-1.0 | 0.15 | 0.10 | 0.30 total | *Ingot Designation: UNS M16511* *Note: The balanced composition ensures optimal response to T5 aging treatment, with zinc providing solid solution strengthening and zirconium ensuring fine, uniform grain structure throughout the casting.* --- #### **4. Typical Physical & Mechanical Properties (T5 Temper)** **Physical Properties:** | Property | Value | |---------------------------|------------------------------| | **Density** | 1.81 g/cm³ (0.0654 lb/in³) | | **Melting Range** | 620-645°C (1148-1193°F) | | **Thermal Conductivity** | 117 W/m·K | | **Specific Heat Capacity**| 1020 J/kg·K | | **Coefficient of Thermal Expansion** | 25.7 × 10⁻⁶/°C | | **Solidification Shrinkage** | 4.2% | **Mechanical Properties (Sand Cast - T5 Temper):** | Property | Minimum | Typical | |---------------------------|----------------|----------------| | **Ultimate Tensile Strength** | 235 MPa (34 ksi) | 250 MPa (36 ksi) | | **Tensile Yield Strength**| 145 MPa (21 ksi) | 165 MPa (24 ksi) | | **Elongation** | 3.5% | 5.0% | | **Compressive Yield Strength** | 145 MPa (21 ksi) | 165 MPa (24 ksi) | | **Shear Strength** | 145 MPa (21 ksi) | 160 MPa (23 ksi) | | **Fatigue Strength** | 97 MPa (14 ksi) | 110 MPa (16 ksi) | | **Elastic Modulus** | 45 GPa (6.5×10⁶ psi) | 45 GPa (6.5×10⁶ psi) | | **Hardness** | 65 HB | 70 HB | | **Impact Toughness** | 3.5 J | 4.5 J | --- #### **5. International Standards & Specifications** ZK51A-T5 Castings fully comply with: - **AMS 4443:** Aerospace Material Specification for Sand Castings - **ASTM B80:** Standard Specification for Magnesium-Alloy Sand Castings - **SAE J465:** Wrought and Cast Magnesium Alloys - **UNS M16510:** Cast Products Designation - **UNS M16511:** Ingot Designation - **Old SAE 509:** Previous Designation (Superseded) --- #### **6. Applications** **Aerospace & Defense:** - Aircraft transmission housings - Gearbox cases and covers - Engine accessory mounts - Missile body sections - Helicopter transmission components - Radar antenna structures **Military Applications:** - Weapon system components - Military vehicle parts - Portable equipment housings - Communication equipment cases **Industrial Equipment:** - High-speed compressor housings - Pump bodies and impellers - Machinery structural components - Material handling equipment parts **Automotive & Racing:** - High-performance engine components - Racing transmission cases - Specialty vehicle components --- #### **7. Foundry & Processing Parameters** **Casting Characteristics:** - **Pouring Temperature:** 720-780°C (1328-1436°F) - **Mold Temperature:** 200-400°C (392-752°F) - **Fluidity:** Good to excellent - **Feeding Requirements:** Moderate - **Hot Tearing Tendency:** Low **Heat Treatment (T5):** - **Artificial Aging:** 175-200°C (347-392°F) for 16-24 hours - **Temperature Control:** ±5°C (±9°F) critical for consistency - **Cooling:** Air cool to room temperature - **Atmosphere:** Air atmosphere acceptable **Machining Characteristics:** - **Machinability Rating:** Excellent - **Cutting Speed:** High-speed operations possible - **Surface Finish:** Very good - **Tool Life:** Excellent with proper techniques **Quality Control Requirements:** - **Chemical Analysis:** Required for heat certification - **Mechanical Testing:** Tensile testing from separately cast coupons - **Radiographic Inspection:** Per applicable quality levels - **Dye Penetrant:** For surface defect detection --- #### **8. Design & Manufacturing Considerations** - **Section Thickness:** 3-50 mm recommended - **Draft Angles:** 1-3° typically required - **Fillet Radii:** Minimum 3 mm for stress reduction - **Coring:** Readily accommodates complex cores - **Machining Allowances:** 1.5-3.0 mm typical - **Surface Finish:** As-cast surface suitable for many applications --- **Disclaimer** This technical data is based on industry standards and typical foundry experience. Properties may vary depending on casting design, section size, and specific processing parameters. Users should consult the latest revisions of AMS 4443, ASTM B80, and SAE J465 specifications for current requirements. All manufacturing processes must follow established safety procedures for magnesium casting and machining 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 3371 gallon liquid totes Special package is available on request.