Aluminium-manganese Master Alloy，Aluminium manganese Alloy，AlMn Alloy，E FORU

**Product Datasheet: Aluminium-Manganese Master Alloy (Al-Mn Alloy)** **Version:** 1.0 | **Date:** 2025-04-02 --- ### **1. General Overview** Aluminium-Manganese Master Alloy (Al-Mn Alloy) is one of the most essential and widely used master alloys in the aluminium industry. Manganese serves as a crucial alloying element that enhances strength through solid solution strengthening, improves corrosion resistance, and functions as a grain refiner. This master alloy is fundamental for producing 3xxx series aluminium alloys and is extensively used in beverage cans, heat exchangers, and architectural applications due to its excellent combination of properties. --- ### **2. International Standards** Al-Mn master alloys are specified in 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 3xxx 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%Mn, Al-15%Mn, Al-20%Mn, Al-25%Mn --- ### **3. Chemical Composition (Weight %)** Typical composition ranges for Al-Mn master alloy: | Element | Content (%) | Role & Remarks | |---------------------|-------------------|------------------------------------------| | Manganese (Mn) | 5.0 – 25.0 | Primary alloying element | | Iron (Fe) | ≤ 0.25 | Impurity control | | Silicon (Si) | ≤ 0.20 | Impurity control | | Copper (Cu) | ≤ 0.05 | Impurity control | | Zinc (Zn) | ≤ 0.05 | Impurity control | | Magnesium (Mg) | 0 – 1.5 | Optional addition for enhanced strength | | Other Impurities | ≤ 0.15 total | — | | Aluminium (Al) | Balance | Base metal | --- ### **4. Physical Properties** | Property | Value / Range | |---------------------------|-----------------------------------| | Density | 2.8 – 3.3 g/cm³ | | Melting Range | 650 – 850°C | | Intermetallic Phases | Al₆Mn, Al₄Mn, Al₁₂Mn, Al₆(Mn,Fe) | | Thermal Conductivity | 110 – 160 W/m·K | | Electrical Conductivity | 35 – 50 % IACS | | Vickers Hardness | 45 – 95 HV | | Coefficient of Thermal Expansion | 23–25 × 10⁻⁶/K | --- ### **5. Key Characteristics & Advantages** - **Solid Solution Strengthening:** Significant strength increase while maintaining good ductility - **Excellent Corrosion Resistance:** Superior to most other aluminium alloy systems - **Grain Refinement:** Effective grain size control through dispersed intermetallic particles - **Good Workability:** Excellent hot and cold working characteristics - **Brazeability:** Suitable for brazing applications in heat exchangers - **Recovery Rate:** High and consistent manganese recovery during alloying --- ### **6. Product Applications** - **Beverage Can Stock:** Body stock and end stock for food and beverage containers - **Heat Exchangers:** Radiators, air conditioning systems, charge air coolers - **Architectural Applications:** Roofing, siding, curtain walls - **Cooking Utensils:** Pots, pans, cooking sheets - **Chemical Equipment:** Storage tanks, processing vessels - **Automotive Parts:** Trim, heat shields, structural components - **Marine Applications:** Boat hulls, marine hardware --- ### **7. Available Forms** - **Master Alloy:** Ingots, notch bars, waffle plates - **Wrought Products:** Sheet, plate, foil, strip - **Special Forms:** Powder, granules for specific applications - **Standard Sizes:** 5–20 kg ingots --- ### **8. Technical Guidelines for Use** - **Addition Rate:** 0.5–1.5% Mn to the melt (depending on target alloy) - **Melt Temperature:** 720–780°C - **Holding Time:** 30–60 minutes for complete dissolution - **Stirring:** Moderate mechanical stirring recommended - **Casting Temperature:** 690–730°C - **Cooling Rate:** Controlled to prevent excessive segregation --- ### **9. Mechanical Properties of Common Alloys** | Alloy | Mn Content (%) | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | |-------|----------------|---------------------|-----------------------|----------------| | **3003** | 1.0–1.5 | 110–145 | 200–240 | 20–30 | | **3004** | 1.0–1.5 | 150–200 | 240–285 | 8–20 | | **3005** | 1.0–1.5 | 130–180 | 220–260 | 12–25 | | **3105** | 0.3–0.8 | 115–150 | 195–230 | 15–25 | --- ### **10. Corrosion Performance** | Environment | Performance Rating | Characteristics | Protection Methods | |-------------|-------------------|-----------------|-------------------| | **Atmospheric** | Excellent | Stable oxide film formation | None typically required | | **Marine** | Very Good | Good pitting resistance | Coatings for severe exposure | | **Fresh Water** | Excellent | General corrosion resistance | Cathodic protection if needed | | **Chemical** | Good | Resists many chemicals | Dependent on specific chemical | --- ### **11. Quality Control Parameters** - Manganese content consistency (±0.15%) - Homogeneous microstructure - Controlled intermetallic particle size and distribution - Low hydrogen content (< 0.15 ml/100g) - Chemical composition certification --- ### **12. Health, Safety & Handling** - **Standard Handling:** Generally safe with standard precautions - **Dust Control:** Avoid inhalation of fine particles during processing - **Personal Protection:** Standard foundry PPE required - **Ventilation:** Adequate fume extraction recommended - **Storage:** Dry conditions to prevent excessive oxidation - **Disposal:** Follow standard metal disposal protocols --- ### **13. Economic & Supply Considerations** - **Cost-Effective:** Manganese is abundant and relatively inexpensive - **Supply Security:** Stable global supply chain - **Processing Efficiency:** High recovery rates in alloying process - **Recycling:** Excellent recyclability with minimal property degradation --- ### **14. Specialized Applications Detail** **Beverage Can Body Stock (Alloy 3004):** - High strength for thin-walled containers - Good formalbility for deep drawing - Excellent corrosion resistance for product compatibility **Heat Exchanger Materials (Alloy 3003):** - Good thermal conductivity - Corrosion resistance to coolants - Suitable for brazing operations --- ### **15. Research & Development Trends** - **High-Strength Variants:** Development of alloys with enhanced strength - **Improved Formability:** Better deep drawing characteristics for packaging - **Recycling Optimization:** Enhanced control of impurity elements - **Surface Engineering:** Improved corrosion and wear resistance - **Additive Manufacturing:** Development of Al-Mn powders for 3D printing --- ### **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-Mn alloys generally exhibit excellent corrosion resistance, performance in specific environments should be verified. Always follow good manufacturing practices and safety guidelines.

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 2303 gallon liquid totes Special package is available on request.