Magnesium Manganese (Mg-Mn) Master Alloy，Magnesium Manganese Alloy，MgMn Alloy,E FOUR

### **Magnesium Manganese (Mg-Mn) Master Alloy** **Product Overview** Magnesium Manganese Master Alloy, commonly designated as Mg-Mn Alloy, is a fundamental grain refining and purifying agent specifically designed for enhancing the properties of magnesium alloys. The addition of manganese serves multiple critical functions: it effectively controls iron impurities, improves corrosion resistance, refines grain structure, and enhances overall alloy stability. This master alloy represents one of the most important and widely used additives in magnesium metallurgy, particularly for producing high-purity, corrosion-resistant magnesium alloys for automotive, aerospace, and electronic applications. The alloy is typically supplied in ingot form, notched bars, or granules to facilitate controlled addition during melting and alloying operations. --- #### **1. Chemical Composition** Mg-Mn Master Alloy features variable manganese content tailored to different processing requirements. | Element | Composition (% by Weight) | | :---------------- | :-------------------------------- | | **Manganese (Mn)** | 5.0 - 25.0 % | | **Magnesium (Mg)** | 75.0 - 95.0 % | | **Iron (Fe)** | ≤ 0.03 % | | **Nickel (Ni)** | ≤ 0.005 % | | **Copper (Cu)** | ≤ 0.02 % | | **Silicon (Si)** | ≤ 0.05 % | | **Aluminum (Al)** | ≤ 0.05 % | | **Other Impurities** | ≤ 0.10 % (each) | *Note:* The **manganese** content can be customized based on specific application needs. Higher manganese concentrations (15-25%) are typically used for more effective iron removal, while moderate concentrations (5-15%) serve for general grain refinement and corrosion enhancement. --- #### **2. Physical & Mechanical Properties** The physical properties vary with manganese content, but general characteristics include: **Physical Properties:** * **Density:** 1.75 - 1.85 g/cm³ (varies with Mn content) * **Melting Range:** 580 - 710 °C (1076 - 1310 °F) * **Appearance:** Grayish-silver metallic appearance * **Solubility in Magnesium:** Complete at standard processing temperatures **Effect on Final Magnesium Alloys:** When properly added to magnesium alloys, Mg-Mn Master Alloy provides: * **Iron Removal:** Forms harmless Mn-Fe intermetallic compounds that settle out of the melt * **Grain Refinement:** Improves microstructure and mechanical properties * **Corrosion Resistance:** Significantly enhances corrosion performance by controlling iron content * **Strength Enhancement:** Moderate improvement in mechanical properties * **Microstructural Stability:** Improves high-temperature stability --- #### **3. International Standards & Specifications** Mg-Mn Master Alloy is covered under various international and industry specifications. * **ASTM International:** **ASTM B951** (Standard Practice for Codification of Unalloyed Magnesium and Magnesium-Alloys) * **ISO Standards:** **ISO 16220** (Magnesium and magnesium alloys - Castings) * **SAE International:** **SAE J465** * **DIN Standards:** **DIN 1729-2** * **AMS Standards:** **AMS 4377** (for magnesium-manganese wrought alloys) * **Custom Specifications:** Often produced according to customer-specific requirements --- #### **4. Product Applications** Mg-Mn Master Alloy serves as a critical processing material across multiple industrial sectors. * **Magnesium Alloy Production:** * **High-Purity Magnesium Alloys** (e.g., AZ91D, AM60B) * **Corrosion-Resistant Magnesium Alloys** * **Wrought Magnesium Alloy Production** * **Aerospace Grade Magnesium Alloys** * **Aluminum Alloy Modification:** * **Aluminum-Magnesium Alloy Production** * **Aluminum Alloy Grain Refinement** * **Corrosion-Resistant Aluminum Alloy Manufacturing** * **Specialized Applications:** * **Sacrificial Anode Production** * **Cathodic Protection Systems** * **Chemical Processing Equipment** * **Marine Component Manufacturing** * **Industrial Processing:** * **Steel Desulfurization** * **Non-Ferrous Metal Refining** * **Welding Electrode Manufacturing** * **Specialty Chemical Production** --- #### **5. Usage Guidelines and Processing** **Typical Addition Rates:** * **For Magnesium Alloys:** 0.3 - 2.0% of total melt weight * **For Aluminum Alloys:** 0.1 - 1.0% of total melt weight * **For Iron Control:** Higher additions may be required for high-iron melts **Processing Parameters:** * **Optimal Processing Temperature:** 680 - 750 °C (1256 - 1382 °F) * **Contact Time:** 15 - 30 minutes for complete reaction * **Atmosphere Control:** Recommended to use protective gas cover * **Addition Method:** Add during early stages of melting process * **Settling Time:** Allow adequate time for intermetallic compounds to settle --- **Summary** **Magnesium Manganese Master Alloy (Mg-Mn Alloy)** represents a cornerstone technology in magnesium metallurgy, serving as an essential additive for producing high-quality, corrosion-resistant magnesium alloys. The strategic addition of **manganese** provides crucial benefits in **iron impurity control**, **corrosion resistance enhancement**, and **microstructural refinement**. The alloy's ability to form stable Mn-Fe intermetallic compounds that effectively remove iron from magnesium melts makes it indispensable for achieving the corrosion performance required in automotive, aerospace, and consumer electronics applications. Mg-Mn Master Alloy's versatility in manganese content and physical forms ensures it can be precisely tailored to meet specific manufacturing requirements, making it an essential tool for foundry engineers and metallurgists committed to producing premium quality magnesium components with reliable long-term performance in demanding service environments.

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 3441 gallon liquid totes Special package is available on request.