Aluminium-silver Master Alloy，Aluminium silver Alloy，AlAg Alloy，E FORU

**Product Datasheet: Aluminium-Silver Master Alloy (Al-Ag Alloy)** **Version:** 1.0 | **Date:** 2025-04-02 --- ### **1. General Overview** Aluminium-Silver Master Alloy (Al-Ag Alloy) is a specialized high-value master alloy that utilizes silver's unique properties to enhance corrosion resistance, electrical conductivity, and mechanical properties of aluminium alloys. Silver forms a continuous solid solution with aluminium and provides exceptional thermal and electrical conductivity while maintaining excellent corrosion resistance. This master alloy is primarily used in premium applications where performance justifies the significant material cost. --- ### **2. International Standards** Al-Ag 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 4180 (Aluminum-Silver Alloy Sheet and Plate) - **GB/T:** GB/T 8734 (Aluminium alloy master alloys) - **Typical Master Alloy Grades:** Al-10%Ag, Al-20%Ag, Al-30%Ag, Al-50%Ag --- ### **3. Chemical Composition (Weight %)** Typical composition ranges for Al-Ag master alloy: | Element | Content (%) | Role & Remarks | |---------------------|-------------------|------------------------------------------| | Silver (Ag) | 5.0 – 50.0 | Primary alloying element | | Copper (Cu) | 0 – 3.0 | Optional addition for enhanced strength | | Magnesium (Mg) | 0 – 2.0 | Optional addition for specific properties| | Iron (Fe) | ≤ 0.15 | Impurity control | | Silicon (Si) | ≤ 0.10 | Impurity control | | Zinc (Zn) | ≤ 0.05 | Impurity control | | Other Impurities | ≤ 0.08 total | — | | Aluminium (Al) | Balance | Base metal | --- ### **4. Physical Properties** | Property | Value / Range | |---------------------------|-----------------------------------| | Density | 3.0 – 4.5 g/cm³ | | Melting Range | 660 – 961°C (Ag melts at 961°C) | | Solid Solution | Complete solubility in aluminium | | Thermal Conductivity | 180 – 240 W/m·K | | Electrical Conductivity | 50 – 65 % IACS | | Vickers Hardness | 45 – 100 HV | | Coefficient of Thermal Expansion | 22–25 × 10⁻⁶/K | --- ### **5. Key Characteristics & Advantages** - **Exceptional Conductivity:** Highest electrical and thermal conductivity of aluminium alloys - **Superior Corrosion Resistance:** Excellent resistance to various corrosive environments - **Antimicrobial Properties:** Silver provides inherent antimicrobial characteristics - **High Temperature Stability:** Maintains properties at elevated temperatures - **Excellent Brazing Characteristics:** Ideal for high-quality joining applications - **Good Mechanical Properties:** Balanced strength and ductility combination --- ### **6. Product Applications** - **Electrical Contacts:** High-performance electrical connectors and switches - **Aerospace Components:** Critical electrical systems, waveguides - **Medical Equipment:** Surgical instruments, antimicrobial surfaces - **Jewelry and Decorative:** High-quality decorative applications - **Brazing Alloys:** Premium aluminium brazing materials - **Electronic Packaging:** Heat sinks, thermal management components - **Marine Applications:** Corrosion-resistant marine components --- ### **7. Available Forms** - **Master Alloy:** Ingots, notch bars under protective atmosphere - **Wrought Products:** Sheet, plate, wire, foil - **Special Forms:** Sputtering targets, powder for specific applications - **Standard Sizes:** 2–10 kg ingots --- ### **8. Technical Guidelines for Use** - **Addition Rate:** 0.5–10.0% Ag to the melt (depending on application) - **Melt Temperature:** 720–800°C - **Holding Time:** 20–40 minutes for complete dissolution - **Stirring:** Gentle mechanical stirring recommended - **Atmosphere Control:** Recommended under protective atmosphere - **Casting Temperature:** 690–750°C --- ### **9. Electrical and Thermal Performance** | Ag Content (%) | Electrical Conductivity (% IACS) | Thermal Conductivity (W/m·K) | Corrosion Resistance | |----------------|---------------------------------|----------------------------|---------------------| | **0.5–2.0** | 55–60 | 200–220 | Excellent | | **2.0–5.0** | 58–62 | 210–230 | Outstanding | | **5.0–10.0** | 60–65 | 220–240 | Exceptional | | **> 10.0** | 62–68 | 230–250 | Superior | --- ### **10. Comparison with Other Conductor Alloys** | Alloy System | Conductivity (% IACS) | Corrosion Resistance | Cost | Typical Applications | |--------------|----------------------|---------------------|------|---------------------| | **Al-Ag** | 60–65 | Excellent | Very High | Premium electrical | | **Pure Al** | 61–63 | Excellent | Low | General electrical | | **Al-Mg-Si** | 50–55 | Very Good | Medium | Structural electrical | | **Al-Cu** | 45–50 | Good | Medium | High strength electrical | --- ### **11. Quality Control Parameters** - Silver content consistency (±0.1%) - High purity certification (99.95% minimum) - Low gas content (hydrogen < 0.10 ml/100g) - Homogeneous microstructure - Electrical conductivity verification --- ### **12. Health, Safety & Handling** - **Low Toxicity:** Silver is generally non-toxic in metallic form - **Dust Control:** Standard precautions for fine particles - **Personal Protection:** Standard foundry PPE required - **Value Security:** High-value material requiring secure storage - **Storage:** Dry, secure conditions to prevent theft and oxidation - **Disposal:** Precious metal recovery recommended --- ### **13. Economic Considerations** - **Premium Cost:** Silver content makes this a high-cost master alloy - **Value Justification:** Performance benefits justify cost in specific applications - **Recycling Imperative:** Essential to recover silver from scrap and waste - **Supply Security:** Subject to silver market fluctuations - **Insurance Requirements:** High-value inventory may require special insurance --- ### **14. Specialized Applications Detail** **High-Frequency Electronics:** - Excellent surface conductivity - Low signal loss at high frequencies - Good corrosion stability **Medical Applications:** - Inherent antimicrobial properties - Biocompatibility for medical devices - Corrosion resistance to sterilization --- ### **15. Research & Development Trends** - **Nanocomposite Materials:** Al-Ag composites with enhanced properties - **Additive Manufacturing:** Development of specialized powders for 3D printing - **Surface Engineering:** Silver-rich surface layers for specific applications - **Sustainable Processing:** Improved recycling and recovery methods - **Multi-functional Alloys:** Combined electrical, thermal, and mechanical optimization --- ### **Disclaimer** This information is provided for technical reference only. Properties and performance may vary based on specific application conditions and processing parameters. Al-Ag alloys represent premium materials with significant cost implications. The high value of silver content necessitates strict inventory control and security measures. Users must conduct comprehensive cost-benefit analysis and technical evaluation before implementation. Always follow secure handling procedures and consult with materials engineering specialists for critical applications in electrical, medical, and aerospace sectors. Silver recovery from scrap and waste streams is economically essential.

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 2313 gallon liquid totes Special package is available on request.