Magnesium ZC-63A-T6,UNS M16631; Mg; ASTM B 80; European EN 1753 MC32110,E FOUR

### **Product Datasheet: Magnesium ZC63A-T6 (UNS M16631)** **High-Strength Zinc-Copper Magnesium Casting Alloy for Automotive and Industrial Applications** --- #### **1. Overview** Magnesium ZC63A-T6 (UNS M16631) is a high-strength, heat-treatable casting alloy that achieves its mechanical properties through optimized zinc and copper additions. Certified to ASTM B80 and European EN 1753 MC32110 standards, this alloy in the T6 temper (solution heat-treated and artificially aged) provides an excellent combination of room temperature strength, castability, and cost-effectiveness. While not suitable for elevated temperature applications above 150°C (300°F), ZC63A-T6 offers superior mechanical properties for automotive, industrial, and general engineering applications where weight reduction and structural performance are key considerations. --- #### **2. Key Features & Advantages** - **High Room Temperature Strength:** Excellent mechanical properties at ambient temperatures - **Good Castability:** Suitable for sand, permanent mold, and die casting processes - **Cost-Effective Production:** Utilizes lower-cost alloying elements compared to rare-earth containing alloys - **Good Pressure Tightness:** Minimal porosity in properly cast components - **Excellent Machinability:** Can be machined to high tolerances with good surface finish - **Good Wear Resistance:** Suitable for moving components and bearing surfaces - **Standard Compliance:** Meets both ASTM and European material standards --- #### **3. Chemical Composition (Weight %)** As specified in ASTM B80 and EN 1753 MC32110: | Element | Mg (Balance) | Zn | Cu | Mn (max) | Si (max) | Other Elements (max) | |---------------|--------------|------------|------------|------------|------------|---------------------| | **Content (%)** | - | 5.5-6.5 | 2.5-3.5 | 0.15 | 0.10 | 0.30 total | *Note: Zinc provides solid solution strengthening while copper enables precipitation hardening through the T6 heat treatment. The balanced composition ensures optimal mechanical properties and castability.* --- #### **4. Typical Physical & Mechanical Properties (T6 Temper)** | Property | Value | Condition / Remarks | |---------------------------|------------------------------|---------------------| | **Density** | 1.86 g/cm³ (0.067 lb/in³) | | | **Melting Range** | 470-590°C (878-1094°F) | | | **Thermal Conductivity** | 84 W/m·K | At 25°C | | **Coefficient of Thermal Expansion** | 26.5 × 10⁻⁶/°C | 20-100°C | | **Ultimate Tensile Strength** | 240-280 MPa (35-41 ksi) | Room Temperature | | **Tensile Yield Strength**| 145-170 MPa (21-25 ksi) | 0.2% offset, RT | | **Elongation** | 5-10% | In 2 inches, RT | | **Compressive Yield Strength** | 145-170 MPa (21-25 ksi) | | | **Shear Strength** | 130-150 MPa (19-22 ksi) | | | **Fatigue Strength** | 90-110 MPa (13-16 ksi) | 5×10⁷ cycles, RT | | **Elastic Modulus** | 45 GPa (6.5×10⁶ psi) | | | **Hardness** | 65-80 HB | | --- #### **5. International Standards & Specifications** ZC63A-T6 is fully certified to the following international standards: - **ASTM B80:** Standard Specification for Magnesium-Alloy Sand Castings - **EN 1753 MC32110:** European Standard Designation - **UNS M16631:** Unified Numbering System - **ISO 16220:** Magnesium and magnesium alloys - Castings - **ASTM B199:** Specification for Permanent Mold Castings --- #### **6. Applications** - **Automotive Components:** - Transmission cases and housings - Engine brackets and supports - Steering column components - Wheel rims (specialty and racing vehicles) - Intake manifolds and covers - **Industrial Equipment:** - Power tool housings and gearboxes - Compressor components and housings - Pump bodies and impellers - Material handling equipment parts - Machine tool components - **Aerospace (Non-structural):** - Accessory housings and brackets - Interior components and fittings - Electronic equipment enclosures - **Consumer & Commercial:** - Sporting goods equipment - Professional audio equipment housings - Camera and optical equipment bodies --- #### **7. Heat Treatment & Processing** - **Solution Treatment:** 485°C ± 5°C (905°F ± 9°F) for 4-8 hours - **Quenching:** Hot water or air quenching - **Artificial Aging:** 175°C ± 5°C (347°F ± 9°F) for 8-16 hours (T6 temper) - **Casting Methods:** - Sand casting (primary application per ASTM B80) - Permanent mold casting - Die casting (with modified parameters) - **Machining:** Excellent machinability with high material removal rates - **Joining:** Weldable using TIG methods with compatible filler materials - **Surface Treatment:** Requires standard magnesium protection schemes --- #### **8. Quality Assurance & Certification** - **Chemical Analysis:** Certified to ASTM B80 and EN 1753 requirements - **Mechanical Testing:** Full certification to specified properties - **Radiographic Inspection:** Capable of meeting industrial quality standards - **Dye Penetrant Testing:** For surface defect detection - **Microstructural Control:** Grain size and intermetallic phase distribution --- **Disclaimer** This technical data is for informational purposes only. Properties may vary depending on casting method, section size, and heat treatment parameters. ZC63A-T6 is not recommended for continuous service above 150°C (300°F) or in highly corrosive environments without adequate protection. Users should consult the relevant specifications (ASTM B80, EN 1753 MC32110) and conduct appropriate testing for specific applications. All machining and processing must follow established safety procedures for magnesium alloys.

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 3357 gallon liquid totes Special package is available on request.