Aluminium-molybdenum Master Alloy，Aluminium molybdenum Alloy，AlMo Alloy，E FORU

**Product Datasheet: Aluminium-Molybdenum Master Alloy (Al-Mo Alloy)** **Version:** 1.0 | **Date:** 2025-04-02 --- ### **1. General Overview** Aluminium-Molybdenum Master Alloy (Al-Mo Alloy) is a specialized high-performance master alloy that utilizes molybdenum to enhance elevated temperature strength, creep resistance, and microstructural stability in aluminium alloys. Molybdenum forms stable intermetallic compounds with aluminium, particularly Al₅Mo and Al₁₂Mo, which provide exceptional thermal stability and precipitation strengthening effects. This master alloy is primarily used in demanding aerospace, automotive, and high-temperature structural applications. --- ### **2. International Standards** Al-Mo master alloys are specified in several international standards: - **ASTM:** ASTM B179 (Standard Specification for Aluminum Alloys in Ingot and Molten Forms) - **ISO:** ISO 209-1 (Wrought aluminium and aluminium alloys) - **EN:** EN 1676 (Aluminium and aluminium alloys - Master alloys) - **AMS:** AMS 4485 (Aluminum-Molybdenum Alloy Sheet and Plate) - **GB/T:** GB/T 8734 (Aluminium alloy master alloys) - **Typical Master Alloy Grades:** Al-10%Mo, Al-20%Mo, Al-30%Mo, Al-40%Mo --- ### **3. Chemical Composition (Weight %)** Typical composition ranges for Al-Mo master alloy: | Element | Content (%) | Role & Remarks | |------------------------|-------------------|------------------------------------------| | Molybdenum (Mo) | 5.0 – 40.0 | Primary alloying element | | Iron (Fe) | ≤ 0.15 | Impurity control | | Silicon (Si) | ≤ 0.10 | Impurity control | | Copper (Cu) | ≤ 0.05 | Impurity control | | Zirconium (Zr) | 0 – 2.0 | Optional addition for enhanced stability | | Titanium (Ti) | 0 – 1.5 | Optional grain refining addition | | Other Impurities | ≤ 0.08 total | — | | Aluminium (Al) | Balance | Base metal | --- ### **4. Physical Properties** | Property | Value / Range | |---------------------------|-----------------------------------| | Density | 3.0 – 4.2 g/cm³ | | Melting Range | 660 – 2620°C (Mo melts at 2620°C) | | Intermetallic Phases | Al₅Mo, Al₁₂Mo, Al₈Mo, Al₄Mo | | Crystal Structure | Complex tetragonal and cubic | | Thermal Conductivity | 80 – 130 W/m·K | | Electrical Conductivity | 25 – 40 % IACS | | Vickers Hardness | 85 – 160 HV | | Coefficient of Thermal Expansion | 19–23 × 10⁻⁶/K | --- ### **5. Key Characteristics & Advantages** - **Exceptional High-Temperature Strength:** Maintains mechanical properties up to 450°C - **Superior Creep Resistance:** Excellent resistance to deformation under sustained load at high temperatures - **Microstructural Stability:** Resists grain growth and precipitate coarsening - **Recrystallization Inhibition:** Significantly increases recrystallization temperature - **Corrosion Resistance:** Enhanced resistance to various corrosive environments - **Wear Resistance:** Hard intermetallic phases improve abrasion resistance --- ### **6. Product Applications** - **Aerospace Components:** Turbine blades, engine mounts, structural supports - **Automotive Pistons:** High-performance racing and diesel engine pistons - **Heat Exchangers:** High-temperature thermal management systems - **Nuclear Applications:** Structural components requiring thermal stability - **Additive Manufacturing:** Specialty powders for high-temperature 3D printing - **Electronic Packaging:** Controlled thermal expansion applications - **Tooling and Molds:** High-temperature tooling applications --- ### **7. Available Forms** - **Master Alloy:** Ingots, notch bars, granules - **Special Forms:** Powder for additive manufacturing, custom shapes - **High-Purity Grades:** 99.95% for critical applications - **Standard Sizes:** 2–8 kg ingots --- ### **8. Technical Guidelines for Use** - **Addition Rate:** 0.2–3.0% Mo to the melt (typically 0.5–1.5% for optimal effects) - **Melt Temperature:** 800–900°C - **Holding Time:** 60–120 minutes for complete dissolution - **Stirring:** Vigorous mechanical stirring essential - **Casting Temperature:** 730–790°C - **Heat Treatment:** Solution treatment at 540–610°C, aging at 375–475°C --- ### **9. High-Temperature Mechanical Properties** | Temperature (°C) | Yield Strength (MPa) | Tensile Strength (MPa) | Creep Rupture Life (h) | |------------------|---------------------|-----------------------|------------------------| | **25** | 300–380 | 350–430 | — | | **250** | 220–280 | 260–320 | >1000 | | **350** | 180–230 | 210–270 | 500–800 | | **450** | 140–190 | 170–220 | 100–300 | --- ### **10. Comparison with Other High-Temperature Alloys** | Alloy System | Max Service Temp (°C) | Creep Resistance | Cost | Typical Applications | |--------------|----------------------|------------------|------|---------------------| | **Al-Mo** | 450 | Excellent | High | Aerospace, Automotive | | **Al-Nb** | 500 | Excellent | Very High | Premium aerospace | | **Al-Zr** | 400 | Very Good | Medium | General high-temp | | **Al-V** | 380 | Good | Medium | Special applications | --- ### **11. Metallurgical Mechanisms** - Forms stable Al₅Mo and Al₁₂Mo intermetallic phases - Provides dispersion strengthening through coherent precipitates - Enhances recrystallization temperature by 180–220°C - Improves grain boundary stability through Zener pinning - Creates fine, uniform distribution of strengthening phases --- ### **12. Quality Control Parameters** - Molybdenum content consistency (±0.15%) - Low gas content (hydrogen < 0.08 ml/100g) - Homogeneous distribution of intermetallic particles - Controlled particle size distribution (0.2–5.0 μm) - Certification for aerospace and automotive applications --- ### **13. Health, Safety & Handling** - **Low Toxicity:** Molybdenum metal and compounds have low toxicity - **Dust Control:** Avoid inhalation of fine particles - use respiratory protection - **Personal Protection:** Standard foundry PPE with heat protection - **High-Temperature Processing:** Special precautions for high-temperature operations - **Storage:** Dry, controlled environment - **Disposal:** Follow standard metal disposal protocols --- ### **14. Economic & Supply Considerations** - **Strategic Material:** Molybdenum is a critical industrial metal - **Cost Factors:** Moderate to high cost depending on market conditions - **Supply Security:** Relatively stable with diversified global production - **Recycling:** Economically viable due to molybdenum value retention - **Processing Cost:** Higher energy requirements for dissolution --- ### **15. Research & Development Trends** - **Nanoscale Engineering:** Control of precipitate size and distribution - **Multi-component Alloys:** Al-Mo-Zr, Al-Mo-Sc complex systems - **Additive Manufacturing:** Development of optimized powders for 3D printing - **High-Temperature Coatings:** Molybdenum-aluminium coating systems - **Sustainable Processing:** Improved energy efficiency in alloy production --- ### **Disclaimer** This information is provided for technical reference only. Properties and performance may vary based on specific application conditions, processing parameters, and thermal history. Al-Mo alloys require careful process control and specialized equipment due to high melting temperatures and specific handling requirements. Users must conduct comprehensive testing and technical evaluation before implementation. Always consult with materials engineering specialists for critical high-temperature applications and follow all safety guidelines for high-temperature processing operations.

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 2306 gallon liquid totes Special package is available on request.