Magnesium WE54-T6，UNS M18410; Aerospace Alloy; Mg,E FOUR

### **Product Datasheet: Magnesium WE54-T6 (UNS M18410)** **Premium Aerospace Magnesium Alloy for Maximum High-Temperature Performance** --- #### **1. Overview** Magnesium WE54-T6 (UNS M18410) represents the premium grade of high-temperature magnesium alloys, specifically developed for critical aerospace applications requiring maximum performance at elevated temperatures. With enhanced rare earth and yttrium content compared to WE43, this alloy delivers superior mechanical properties retention up to 300°C (572°F) and exceptional corrosion resistance. The T6 temper (solution heat-treated and artificially aged) provides optimal microstructural stability for the most demanding aerospace components where reliability at high temperatures is paramount. --- #### **2. Key Features & Advantages** - **Maximum High-Temperature Capability:** Optimal performance retention up to 300°C (572°F) - **Superior Corrosion Resistance:** Exceptional resistance to saltwater and industrial environments - **Excellent Creep Resistance:** Maintains dimensional stability under sustained stress at high temperatures - **High Specific Strength:** Superior strength-to-weight ratio for weight-critical applications - **Good Castability:** Produces high-integrity aerospace castings - **Non-radioactive:** Environmentally compliant alternative to thorium-containing alloys - **Long-term Microstructural Stability:** Resistant to aging and property degradation over time --- #### **3. Chemical Composition (Weight %)** | Element | Mg (Balance) | Y | Rare Earth (RE) | Zr | Other (max) | |---------------|--------------|-----------|-----------------|------------|-------------| | **Content (%)** | - | 4.75-5.5 | 2.8-4.0 | 0.4-1.0 | 0.30 total | *Note: Rare earth elements consist primarily of neodymium with carefully balanced heavy rare earth additions. The higher yttrium content compared to WE43 provides enhanced high-temperature strength and stability.* --- #### **4. Typical Physical & Mechanical Properties (T6 Temper)** | Property | Value | Condition / Remarks | |---------------------------|------------------------------|---------------------| | **Density** | 1.85 g/cm³ (0.067 lb/in³) | | | **Melting Range** | 550-640°C (1022-1184°F) | | | **Thermal Conductivity** | 50 W/m·K | At 25°C | | **Specific Heat Capacity**| 960 J/kg·K | At 25°C | | **Coefficient of Thermal Expansion** | 25.8 × 10⁻⁶/°C | 20-200°C | | **Ultimate Tensile Strength** | 270 MPa (39 ksi) | Room Temperature | | **Tensile Yield Strength**| 195 MPa (28 ksi) | 0.2% offset, RT | | **Elevated Temperature YS** | 170 MPa (25 ksi) | At 250°C (482°F) | | **Elongation** | 4-6% | In 2 inches, RT | | **Compressive Yield Strength** | 195 MPa (28 ksi) | | | **Shear Strength** | 150 MPa (22 ksi) | | | **Fatigue Strength** | 125 MPa (18 ksi) | 10⁷ cycles, RT | | **Elastic Modulus** | 44 GPa (6.4×10⁶ psi) | | | **Hardness** | 80-90 HB | | --- #### **5. International Standards** WE54-T6 conforms to the following aerospace and international standards: - **AMS 4428:** Aerospace Material Specification for Castings - **ASTM B80:** Standard Specification for Magnesium-Alloy Sand Castings - **UNS M18410:** Unified Numbering System designation - **Proprietary Aerospace Specifications:** Often supplied to OEM-specific requirements - **ISO 16220:** Magnesium and magnesium alloys - Castings --- #### **6. Applications** - **Aerospace & Defense:** - Jet engine compressor casings and housings - Gearbox and transmission housings - Helicopter transmission systems - Missile guidance system housings - Satellite structural components - Aircraft auxiliary power unit (APU) housings - **Racing & High-Performance:** - Championship-level motorsport engine components - High-stress transmission cases - Turbocharger housings - **Specialized Industrial:** - High-temperature pump housings - Nuclear reactor components - Specialized instrumentation housings --- #### **7. Heat Treatment & Processing** - **Solution Treatment:** 525°C (977°F) for 8-12 hours under protective atmosphere - **Quenching:** Rapid hot water or air quenching - **Artificial Aging:** 250°C (482°F) for 16-24 hours (T6 temper) - **Casting Methods:** - Sand casting (primary application) - Investment casting for complex components - Permanent mold casting for high-volume production - **Machining:** Excellent machinability with high surface finish capability - **Joining:** Good TIG weldability using compatible filler materials - **Surface Treatment:** Excellent response to anodizing and coating processes --- #### **8. Special Considerations** - **Aerospace Certification:** Requires full traceability and certification - **Quality Assurance:** Must meet rigorous aerospace NDT requirements - **Corrosion Protection:** Despite inherent corrosion resistance, aerospace applications typically require additional protection - **Long-term Stability:** Demonstrated performance retention over extended service periods --- **Disclaimer** This technical data is for informational purposes only. WE54-T6 is a premium aerospace alloy requiring strict process controls and certification. Properties may vary based on casting parameters, section size, and heat treatment details. Users must consult relevant aerospace specifications and conduct appropriate qualification testing for specific applications. All processing must follow established aerospace quality procedures and magnesium safety protocols.

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 3354 gallon liquid totes Special package is available on request.