Magnesium Gadolinium (Mg-Gd) Master Alloy，Magnesium Gadolinium Alloy , MgGd Alloy,E FOUR

### **Magnesium Gadolinium (Mg-Gd) Master Alloy** **Product Overview** Magnesium Gadolinium Master Alloy, commercially designated as Mg-Gd Alloy, is a specialized rare earth-containing master alloy engineered to significantly enhance the high-temperature performance and strength characteristics of magnesium alloys. Gadolinium, as a heavy rare earth element, provides exceptional solid solution strengthening and precipitation hardening capabilities, particularly at elevated temperatures. This master alloy is crucial for developing advanced magnesium alloys capable of withstanding temperatures up to 300°C, making it indispensable for aerospace, defense, and high-performance automotive applications. The alloy is typically supplied in ingot form, granules, or crushed fractions to ensure controlled dissolution and homogeneous distribution in magnesium melts. --- #### **1. Chemical Composition** Mg-Gd Master Alloy features variable gadolinium content tailored to specific performance requirements. | Element | Composition (% by Weight) | | :---------------- | :-------------------------------- | | **Gadolinium (Gd)** | 10.0 - 30.0 % | | **Magnesium (Mg)** | 65.0 - 85.0 % | | **Other Rare Earths** | ≤ 5.0 % | | **Iron (Fe)** | ≤ 0.03 % | | **Nickel (Ni)** | ≤ 0.005 % | | **Copper (Cu)** | ≤ 0.02 % | | **Silicon (Si)** | ≤ 0.05 % | | **Aluminum (Al)** | ≤ 0.05 % | | **Other Impurities** | ≤ 0.10 % (each) | *Note:* The **gadolinium** content can be customized based on application requirements, with higher concentrations (20-30%) used for maximum high-temperature performance, and moderate concentrations (10-20%) for balanced properties. The presence of **other rare earths** is typically minimized to maintain the specific benefits of gadolinium. --- #### **2. Physical & Mechanical Properties** The physical properties vary significantly with gadolinium content, exhibiting unique characteristics. **Physical Properties:** * **Density:** 2.0 - 2.5 g/cm³ (varies with Gd content) * **Melting Range:** 600 - 750 °C (1112 - 1382 °F) * **Appearance:** Silvery-gray metallic appearance with yellowish tint * **Solubility in Magnesium:** Complete at standard processing temperatures **Effect on Final Magnesium Alloys:** When properly added to magnesium alloys, Mg-Gd Master Alloy provides: * **Exceptional High-Temperature Strength:** Maintains mechanical properties up to 300°C * **Superior Creep Resistance:** Excellent resistance to deformation under load at elevated temperatures * **Precipitation Hardening:** Forms stable precipitates that resist coarsening * **Solid Solution Strengthening:** Significant strength enhancement through gadolinium dissolution * **Microstructural Stability:** Maintains stable microstructure during prolonged high-temperature exposure --- #### **3. International Standards & Specifications** Mg-Gd Master Alloy is covered under various international and proprietary specifications. * **ASTM International:** **ASTM B951** (Standard Practice for Codification of Unalloyed Magnesium and Magnesium-Alloys) * **ISO Standards:** **ISO 16220** (Magnesium and magnesium alloys - Castings) * **SAE International:** **SAE J465** * **AMS Standards:** **AMS 4427** (for high-temperature magnesium alloys) * **DIN Standards:** **DIN 1729-2** * **Custom Specifications:** Often produced according to customer-specific requirements --- #### **4. Product Applications** Mg-Gd Master Alloy serves critical roles in advanced high-temperature magnesium alloy production. * **Aerospace and Defense:** * **Jet Engine Components** (compressor casings, housings) * **Missile and Defense System Components** * **Helicopter Transmission Components** * **Aircraft Auxiliary Power Unit (APU) Casings** * **High-Temperature Magnesium Alloys:** * **Mg-Gd-Y-Zr Alloys** (e.g., high-performance variants) * **Mg-Gd-Ag-Zr Alloys** * **Mg-Gd-Nd-Zr Alloys** * **Advanced Creep-Resistant Alloys** * **Automotive and Racing:** * **High-Performance Engine Blocks** * **Turbocharger Housings** * **Transmission Components** * **Racing Vehicle Powertrain Parts** * **Specialized Industrial Applications:** * **Nuclear Reactor Components** * **High-Temperature Process Equipment** * **Power Generation Components** * **Advanced Military Equipment** --- #### **5. Usage Guidelines and Processing** **Typical Addition Rates:** * **Standard Applications:** 2.0 - 8.0% of total melt weight * **High-Performance Applications:** 8.0 - 15.0% of total melt weight * **Maximum Recommended:** 20.0% of total melt weight **Processing Parameters:** * **Optimal Processing Temperature:** 700 - 780 °C (1292 - 1436 °F) * **Contact Time:** 20 - 40 minutes for complete dissolution * **Mixing:** Vigorous mechanical stirring required * **Atmosphere Control:** Essential to use protective atmosphere (SF₆, SO₂, or Argon) * **Heat Treatment:** Responds well to T5 and T6 heat treatments --- **Summary** **Magnesium Gadolinium Master Alloy (Mg-Gd Alloy)** represents a cutting-edge advancement in high-temperature magnesium alloy technology. The unique properties of **gadolinium** enable the development of magnesium alloys capable of operating at temperatures up to **300°C**, significantly expanding the application range of magnesium in demanding thermal environments. The alloy's exceptional **solid solution strengthening** and **precipitation hardening** capabilities make it indispensable for aerospace propulsion systems, high-performance automotive components, and advanced defense applications. While commanding a premium cost due to its rare earth content, Mg-Gd Master Alloy delivers unparalleled performance benefits that justify its use in applications where weight reduction, high-temperature capability, and structural integrity are critical requirements. The continued development and optimization of Mg-Gd based alloys ensure their growing importance in next-generation lightweight engineering solutions across multiple high-technology sectors.

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 3443 gallon liquid totes Special package is available on request.