Magnesium WE54A-T6, UNS M18410; Mg; AMS 4426; ASTM B 80; European EN 1753 MC 95310,E FOUR

### **Product Datasheet: Magnesium WE54A-T6 (UNS M18410)** **Premium Aerospace Magnesium Casting Alloy for Maximum High-Temperature Performance** --- #### **1. Overview** Magnesium WE54A-T6 (UNS M18410) represents the premium grade of high-temperature magnesium casting alloys, specifically developed for critical aerospace applications requiring maximum performance retention at elevated temperatures. Certified to AMS 4426, ASTM B80, and EN 1753 MC95310 standards, this alloy features enhanced rare earth and yttrium content that 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 under thermal stress is paramount. --- #### **2. Key Features & Advantages** - **Maximum High-Temperature Capability:** Excellent strength 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 elevated temperatures - **High Specific Strength:** Superior strength-to-weight ratio for weight-critical aerospace applications - **Excellent Castability:** Produces high-integrity castings with minimal porosity - **Long-term Microstructural Stability:** Resistant to over-aging and property degradation - **Full Certification:** Compliant with major international aerospace standards --- #### **3. Chemical Composition (Weight %)** As specified in AMS 4426, ASTM B80, and EN 1753 MC95310: | Element | Mg (Balance) | Y | Rare Earth (RE) | Zr | Other Elements (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 optimized yttrium content provides enhanced solid solution strengthening and high-temperature 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 & Specifications** WE54A-T6 is fully certified to the following international standards: - **AMS 4426:** Aerospace Material Specification for Castings - **ASTM B80:** Standard Specification for Magnesium-Alloy Sand Castings - **EN 1753 MC95310:** European Standard Designation - **UNS M18410:** Unified Numbering System - **ISO 16220:** International Standard for Magnesium 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 and components - **Specialized Industrial:** - High-temperature pump housings - Nuclear reactor components - Specialized instrumentation housings --- #### **7. Heat Treatment & Processing** - **Solution Treatment:** 525°C ± 5°C (977°F ± 9°F) for 8-12 hours under protective atmosphere - **Quenching:** Controlled hot water quenching - **Artificial Aging:** 250°C ± 5°C (482°F ± 9°F) for 16-24 hours (T6 temper) - **Casting Methods:** - Sand casting (primary application per ASTM B80) - Investment casting for complex components - Permanent mold casting - **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. Quality Assurance & Certification** - **Chemical Analysis:** Certified to AMS 4426 requirements - **Mechanical Testing:** Full certification to specified properties - **Radiographic Inspection:** Capable of meeting Level 1 aerospace quality - **Dye Penetrant Testing:** Mandatory for surface defect detection - **Microstructural Control:** Grain size and phase distribution monitoring per aerospace standards --- **Disclaimer** This technical data is for informational purposes only. WE54A-T6 is a premium aerospace alloy requiring strict process controls and full certification. Properties may vary based on casting parameters, section size, and heat treatment details. Users must consult the relevant specifications (AMS 4426, ASTM B80, EN 1753 MC95310) 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 3355 gallon liquid totes Special package is available on request.