Aluminium-praseodymium Master Alloy，Aluminium praseodymium Alloy，AlPr Alloy，E FORU

**Product Datasheet: Aluminium-Praseodymium Master Alloy (Al-Pr Alloy)** **Version:** 1.0 | **Date:** 2025-04-02 --- ### **1. General Overview** Aluminium-Praseodymium Master Alloy (Al-Pr Alloy) is a specialized rare earth-containing master alloy that utilizes praseodymium to enhance high-temperature properties, corrosion resistance, and electrical characteristics of aluminium alloys. Praseodymium forms stable intermetallic compounds and modifies microstructural features, providing unique benefits in specialized applications including electronics, high-temperature components, and advanced material systems. --- ### **2. International Standards** Al-Pr master alloys are referenced in several international specifications: - **ASTM:** ASTM B928 (High Magnesium Aluminum-Alloy Products) - **EN:** EN 1676 (Aluminium and aluminium alloys - Master alloys) - **GB/T:** GB/T 27677 (Aluminium-rare earth master alloys) - **ISO:** ISO 209-1 (Wrought aluminium and aluminium alloys) - **Typical Master Alloy Grades:** Al-5%Pr, Al-10%Pr, Al-15%Pr, Al-20%Pr --- ### **3. Chemical Composition (Weight %)** Typical composition ranges for Al-Pr master alloy: | Element | Content (%) | Role & Remarks | |------------------------|-------------------|------------------------------------------| | Praseodymium (Pr) | 2.0 – 20.0 | Primary rare earth element | | Other RE Elements | ≤ 3.0 | May include Ce, La, Nd | | Iron (Fe) | ≤ 0.15 | Impurity control | | Silicon (Si) | ≤ 0.10 | Impurity control | | Magnesium (Mg) | 0 – 5.0 | Optional addition for enhanced properties| | Copper (Cu) | ≤ 0.05 | Impurity control | | Other Impurities | ≤ 0.08 total | — | | Aluminium (Al) | Balance | Base metal | --- ### **4. Physical Properties** | Property | Value / Range | |---------------------------|-----------------------------------| | Density | 2.9 – 3.8 g/cm³ | | Melting Range | 650 – 935°C (Pr melts at 935°C) | | Intermetallic Phases | Al₄Pr, Al₁₁Pr₃, Al₃Pr, Al₂Pr | | Thermal Conductivity | 90 – 140 W/m·K | | Electrical Conductivity | 30 – 45 % IACS | | Vickers Hardness | 55 – 120 HV | | Coefficient of Thermal Expansion | 21–24 × 10⁻⁶/K | --- ### **5. Key Characteristics & Advantages** - **High-Temperature Stability:** Maintains mechanical properties up to 400°C - **Grain Refinement:** Effective grain size control through Al₄Pr nucleation - **Corrosion Resistance:** Enhanced resistance to various corrosive environments - **Hydrogen Absorption:** Reduces gas porosity in castings - **Electrical Property Modification:** Alters electrical and thermal characteristics - **Oxidation Resistance:** Improves high-temperature oxidation resistance --- ### **6. Product Applications** - **Electronic Packaging:** Thermal management components, heat sinks - **Aerospace Components:** High-temperature structural parts - **Automotive:** Engine components, piston alloys - **Electrical Applications:** Specialized conductor alloys - **Additive Manufacturing:** Specialty powders for 3D printing - **Optical Applications:** Components requiring specific optical properties - **Research & Development:** Experimental alloys for advanced applications --- ### **7. Available Forms** - **Master Alloy:** Ingots, notch bars, granules - **Special Forms:** Powder for additive manufacturing, custom shapes - **High-Purity Grades:** 99.95% for electronic applications - **Standard Sizes:** 2–8 kg ingots --- ### **8. Technical Guidelines for Use** - **Addition Rate:** 0.1–3.0% Pr to the melt (typically 0.3–1.0% for optimal effects) - **Melt Temperature:** 750–820°C - **Holding Time:** 30–60 minutes for complete reaction - **Stirring:** Gentle mechanical stirring recommended - **Casting Temperature:** 700–760°C - **Heat Treatment:** Solution treatment at 500–570°C, aging at 300–400°C --- ### **9. High-Temperature Performance** | Temperature (°C) | Yield Strength Retention (%) | Hardness Retention (%) | Microstructural Stability | |------------------|-----------------------------|------------------------|---------------------------| | **25** | 100 | 100 | Excellent | | **200** | 85–90 | 88–92 | Very Good | | **300** | 75–80 | 78–83 | Good | | **400** | 65–70 | 68–73 | Moderate | --- ### **10. Comparison with Other Rare Earth Elements** | Rare Earth | High-Temp Performance | Corrosion Resistance | Cost | Availability | |------------|----------------------|---------------------|------|--------------| | **Praseodymium** | Very Good | Excellent | Medium | Good | | **Scandium** | Excellent | Very Good | Very High | Limited | | **Yttrium** | Excellent | Excellent | Medium | Good | | **Cerium** | Good | Good | Low | Excellent | --- ### **11. Quality Control Parameters** - Praseodymium content consistency (±0.2%) - Homogeneous distribution of intermetallic phases - Low gas content (hydrogen < 0.12 ml/100g) - Controlled oxide inclusion levels - Chemical composition certification --- ### **12. Health, Safety & Handling** - **Low Toxicity:** Praseodymium compounds generally have low toxicity - **Dust Control:** Avoid inhalation of fine particles during processing - **Personal Protection:** Standard foundry PPE required - **Ventilation:** Adequate fume extraction recommended - **Storage:** Dry, controlled environment to prevent oxidation - **Disposal:** Follow standard metal disposal protocols --- ### **13. Economic & Supply Considerations** - **Cost Factors:** Moderate cost compared to other rare earth elements - **Supply Security:** Generally stable as byproduct of rare earth processing - **Processing Requirements:** Standard aluminium processing equipment suitable - **Recycling:** Compatible with standard aluminium recycling practices --- ### **14. Specialized Applications Detail** **Electronic Thermal Management:** - Controlled thermal expansion characteristics - Good thermal conductivity - Excellent corrosion resistance **High-Temperature Structural Components:** - Good strength retention at elevated temperatures - Oxidation resistance - Microstructural stability --- ### **15. Research & Development Trends** - **Nanocomposite Materials:** Al-Pr composites with enhanced properties - **Multi-element Systems:** Al-Pr-Mg and Al-Pr-Zn complex alloys - **Additive Manufacturing:** Optimized powders for specialized 3D printing - **Surface Engineering:** Praseodymium-containing coatings for improved properties - **Sustainable Alloy Design:** Development of eco-friendly aluminium alloys --- ### **Disclaimer** This information is provided for technical reference only. Properties and performance may vary based on specific application conditions, processing parameters, and base alloy composition. Praseodymium is a strategic material with specific supply chain considerations. Users are advised to conduct comprehensive testing to determine suitability for their specific applications. Always follow good manufacturing practices and safety guidelines, and consult with materials engineering specialists for critical applications in electronic and high-temperature 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 2308 gallon liquid totes Special package is available on request.