Manganese Copper Master Alloy, 7439-96-5, 7440-50-8

MANGANESE COPPER MASTER ALLOY 

1. PRODUCT IDENTIFICATION AND CHEMICAL IDENTITY

Note: There is no single CAS number for the master alloy mixture. The CAS numbers of the component metals are provided above.

2. CHEMICAL STRUCTURE

2.1. Phase Diagram and Crystal Structure

The Copper-Manganese system exhibits a rich phase structure. At room temperature, alloys containing approximately 5-30% Mn by weight are in the α phase (Cu-based FCC solid solution). In the 30-50% Mn range, a mixture of β phase (Body-Centered Cubic – BCC) and γ phase (Face-Centered Cubic – FCC) is observed. The 40Mn and 50Mn grades fall within these two-phase regions.

Crystal Structure:

                    MnCu MASTER ALLOY
                               |
              α (FCC) + β (BCC) / γ (FCC) Phases
                               |
             +----------------+----------------+
             |                |                |
         Cu-rich α Phase  Mn-rich β Phase   Intermetallic
         (FCC)             (BCC)             Compounds

2.2. Phase Structure and Crystallographic Properties

2.3. Crystal Structure Details

3. CHEMICAL COMPOSITION AND PHYSICAL PROPERTIES

3.1. Maximum Impurity Levels (weight %)

Note: Detailed analysis certificate (COA) is provided with each shipment.

4. METALLURGICAL PROPERTIES

4.1. Microstructure

Manganese Copper master alloy contains homogeneously distributed manganese-rich regions within a copper matrix. In the 40Mn grade, α (FCC) and β (BCC) phases coexist, while in the 50Mn grade, the β phase is more dominant. The cooling rate directly affects the morphology and distribution of phases.

4.2. Effects of Manganese Addition

4.3. Coefficient of Thermal Expansion

Manganese Copper alloys have a low coefficient of thermal expansion. Typical values are ~18 × 10⁻⁶/K for 40Mn and ~19 × 10⁻⁶/K for 50Mn (in the 20-300 °C range).

5. APPLICATION AREAS

6. ALLOYING MECHANISM

During master alloy addition to molten copper:

Cu (liquid) + Cu-Mn (master alloy) → Cu-Mn (homogeneous melt)

The master alloy dissolves rapidly, releasing manganese which distributes uniformly throughout the melt. The intermetallic phases break down and manganese dissolves in the copper matrix or forms fine, dispersed intermetallic particles depending on the cooling rate and final composition.

Expected Yield: >95% manganese recovery under normal conditions.

7. ADVANTAGES

8. MELTING AND HANDLING RECOMMENDATIONS

8.1. Storage

• Store in a dry, enclosed, and well-ventilated area

• Avoid contact with moisture and water to prevent oxidation

• Store ingots on pallets, avoiding direct floor contact

• Ambient temperature storage is acceptable

• No shelf life limitation under proper storage conditions

8.2. Melting Recommendations

9. PACKAGING

10. HEALTH, SAFETY AND ENVIRONMENT

Hazard Classification:

• Not hazardous in solid ingot form

• During melting, manganese-containing fumes and dust may be released

• Manganese compounds are toxic when inhaled and ingested

Preventive Measures:

First Aid:

Fire Fighting:

• Solid ingot is not flammable

• Use extinguishing media suitable for surrounding materials (dry chemical, CO₂, water mist)

• Never spray water onto molten metal (steam explosion risk)

Environment:

• Do not discharge residues into water or soil

• Dispose of waste in accordance with local regulations

For complete safety information, refer to the Safety Data Sheet (SDS) provided with the product.

11. QUALITY CONTROL

12. REGULATORY COMPLIANCE

13. QUICK REFERENCE TABLE

14. CRITICAL NOTICES AND BEST PRACTICES

CRITICAL NOTICES:

1. Manganese Content: Two grades available: 40Mn and 50Mn. Choose appropriate grade for the desired manganese content in the final alloy.

2. Melting Temperature: Melting temperatures are grade-specific. Ensure appropriate temperature control during melting.

3. Oxidation Sensitivity: Manganese oxidizes readily. Use appropriate melting practices to minimize oxidation.

4. Deoxidizing Effect: Manganese acts as a deoxidizer. Consider this when calculating oxygen levels in the melt.

5. Sulfur Control: Manganese reduces harmful effects of sulfur by forming MnS.

6. Not Hazardous: Not classified as hazardous in solid form. However, melting operations require appropriate safety measures.

BEST PRACTICE RECOMMENDATIONS:

Storage:

• Store in a dry, well-ventilated area

• Avoid contact with moisture and water

• No special temperature control required

Handling:

• Use protective gloves, safety shoes, and safety goggles

• Use appropriate lifting equipment for pallets

Melting:

• Preheat ingots to 100–150 °C

• Maintain bath temperature 100–200 °C above liquidus

• Use protective cover to reduce oxidation

• Apply stirring for homogeneity

• Expected manganese recovery >95%

Waste Management:

• Do not discharge into sewers or water bodies

• Dispose in accordance with local regulations

LEGAL DISCLAIMER

This Technical Data Sheet (TDS) is for informational purposes only and is prepared based on available technical data. The user is solely responsible for determining the suitability of the product for their specific application and for complying with all local, national, and international regulations. For complete safety, storage, handling, transport, waste, and regulatory compliance information, the official Safety Data Sheet (SDS/MSDS) provided by the manufacturer/supplier must be consulted. This document does not substitute professional advice.