Aluminium-magnesium Master Alloy，Aluminium magnesium Alloy，AlMg Alloy，E FORU

**Product Datasheet: Aluminium-Magnesium Master Alloy (Al-Mg Alloy)** **Version:** 1.0 | **Date:** 2025-04-02 --- ### **1. General Overview** Aluminium-Magnesium Master Alloy (Al-Mg Alloy) is one of the most versatile and widely used master alloy systems in the aluminium industry. Magnesium significantly enhances aluminium's strength through solid solution strengthening while maintaining excellent corrosion resistance, particularly in marine environments. This master alloy enables precise control of magnesium content in final aluminium products, making it essential for producing 5xxx series alloys and numerous casting alloys. --- ### **2. International Standards** Al-Mg master alloys are covered by numerous 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) - **AA:** Aluminum Association designations for 5xxx series alloys - **JIS:** JIS H 2118 (Aluminium alloy master alloys) - **GB/T:** GB/T 8734 (Aluminium alloy master alloys) - **Typical Master Alloy Grades:** Al-10%Mg, Al-20%Mg, Al-30%Mg, Al-50%Mg --- ### **3. Chemical Composition (Weight %)** Typical composition ranges for Al-Mg master alloy: | Element | Content (%) | Role & Remarks | |---------------------|-------------------|------------------------------------------| | Magnesium (Mg) | 5.0 – 50.0 | Primary alloying element | | Silicon (Si) | ≤ 0.20 | Impurity control | | Iron (Fe) | ≤ 0.25 | Impurity control | | Copper (Cu) | ≤ 0.05 | Impurity control | | Zinc (Zn) | ≤ 0.05 | Impurity control | | Manganese (Mn) | 0 – 1.0 | Optional addition for enhanced properties| | Other Impurities | ≤ 0.15 total | — | | Aluminium (Al) | Balance | Base metal | --- ### **4. Physical Properties** | Property | Value / Range | |---------------------------|-----------------------------------| | Density | 2.5 – 2.8 g/cm³ | | Melting Range | 450 – 660°C | | Intermetallic Phases | Al₃Mg₂, Al₁₂Mg₁₇, Al₃₀Mg₂₃ | | Thermal Conductivity | 100 – 150 W/m·K | | Electrical Conductivity | 35 – 50 % IACS | | Vickers Hardness | 40 – 90 HV | | Coefficient of Thermal Expansion | 23–26 × 10⁻⁶/K | --- ### **5. Key Characteristics & Advantages** - **Solid Solution Strengthening:** Significant strength increase without heat treatment - **Excellent Corrosion Resistance:** Superior performance in marine environments - **Good Weldability:** Can be readily welded using various techniques - **High Toughness:** Excellent impact and fatigue resistance - **Anodizing Response:** Produces attractive, corrosion-resistant anodized finishes - **Machinability:** Good machining characteristics in medium-strength conditions --- ### **6. Product Applications** - **Marine Components:** Ship hulls, superstructures, marine fittings - **Automotive Parts:** Body panels, wheels, structural components - **Architectural Applications:** Building facades, roofing, structural members - **Pressure Vessels:** Cryogenic tanks, pressure containers - **Food & Beverage Industry:** Processing equipment, containers - **Chemical Industry:** Storage tanks, processing equipment - **Consumer Goods:** Appliances, sporting goods, furniture --- ### **7. Available Forms** - **Master Alloy:** Ingots, notch bars, waffle plates - **Wrought Forms:** Sheet, plate, extrusions, wire - **Special Forms:** Powder, granules for specific applications - **Standard Sizes:** 5–20 kg ingots --- ### **8. Technical Guidelines for Use** - **Addition Rate:** 0.5–6.0% Mg to the melt (depending on target alloy) - **Melt Temperature:** 700–750°C - **Holding Time:** 20–40 minutes for complete dissolution - **Stirring:** Gentle mechanical stirring recommended - **Cover Flux:** Recommended to prevent magnesium oxidation - **Casting Temperature:** 680–720°C for optimum results --- ### **9. Mechanical Properties vs Magnesium Content** | Mg Content (%) | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Typical Temper | |----------------|---------------------|-----------------------|----------------|----------------| | **2–4** | 80–120 | 180–230 | 22–28 | O, H12 | | **4–6** | 120–180 | 230–280 | 18–24 | H32, H34 | | **6–8** | 180–240 | 280–330 | 12–18 | H116, H321 | | **8–10** | 240–280 | 330–380 | 8–14 | H116, H323 | --- ### **10. Corrosion Performance** | Environment | Performance Rating | Key Characteristics | Protection Methods | |-------------|-------------------|-------------------|-------------------| | **Marine Atmosphere** | Excellent | Stable oxide film, pitting resistance | None typically required | | **Fresh Water** | Excellent | General corrosion resistance | Cathodic protection for immersed | | **Industrial Atmosphere** | Good | Resists sulfur compounds | Regular cleaning | | **Chemical Exposure** | Good to Excellent | Depends on specific chemicals | Coatings for aggressive media | --- ### **11. Quality Control Parameters** - Magnesium content consistency (±0.2%) - Hydrogen content < 0.15 ml/100g - Oxide inclusion control - Homogeneous microstructure - Chemical composition certification --- ### **12. Health, Safety & Handling** - **Fire Hazard:** Fine chips and powder can be flammable - **Dust Control:** Avoid inhalation of fine particles during processing - **Personal Protection:** Standard foundry PPE required - **Melting Precautions:** Use cover fluxes to prevent oxidation - **Storage:** Dry conditions to prevent excessive oxidation - **Disposal:** Follow standard metal disposal protocols --- ### **13. Economic & Supply Considerations** - **Cost-Effective:** Magnesium is relatively abundant and inexpensive - **Supply Security:** Stable global supply chain - **Processing Efficiency:** High recovery rates in alloying - **Recycling:** Excellent recyclability with minimal property degradation --- ### **14. Specialized Applications Detail** **Marine Applications (Alloy 5083, 5086):** - Excellent resistance to seawater corrosion - High strength in H116/H321 tempers - Good weldability for ship construction **Automotive Applications (Alloy 5754, 5182):** - Good formability for complex body panels - High strength-to-weight ratio - Excellent energy absorption characteristics --- ### **15. Research & Development Trends** - **High-Magnesium Alloys:** Development of alloys with >10% Mg content - **Nanostructured Alloys:** Grain refinement for enhanced properties - **Advanced Welding Techniques:** Improved weld quality and properties - **Recycling Optimization:** Better recovery of magnesium in recycled alloys - **Surface Engineering:** Enhanced corrosion and wear resistance --- ### **Disclaimer** This information is provided for technical reference only. Properties and performance may vary based on specific application conditions, processing parameters, and temper conditions. Users are advised to conduct thorough testing to determine suitability for their specific processes. While Al-Mg alloys generally exhibit excellent corrosion resistance, performance in specific environments should be verified. Always follow good foundry practices and safety guidelines, particularly regarding magnesium's flammability in fine forms.

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 2300 gallon liquid totes Special package is available on request.