copper manganese Tin Alloy Resistance Alloy Manganin 29 CuMn7Sn Strip for Chip Resistors
CHEMICAL COMPOSITION
| Mn% | Sn% | Cu% | |
| Nominal Composition | 7 | 2.5 | Bal. |
PHYSICAL PROPERTIES
| Density g/cm3 | 8.5 |
| TCR 10-6/K | ±10 |
| Elastic Modulus GPa | 125 |
| Thermal Conductivity W/(m·K) | 35 |
| Thermal expansion coefficient 10-6/ K | 21.6 |
| EMF μV/K | -1 |
MECHANICAL PROPERTIES
| State | Yield strength | Tensile strength | Elongation | Hardness |
| Mpa | MPa | % | HV | |
| R350 | - | 350 | 30 | 70 |
CuMn7Sn is a designation for a specific type of copper alloy, primarily consisting of copper, manganese, and tin. This alloy is known for its excellent mechanical properties and is often used in applications requiring good strength and wear resistance. Here are the key features and characteristics of CuMn7Sn:
Key Properties
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Composition:
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Mechanical Properties:
- High tensile strength and hardness.
- Good ductility, allowing for easy forming and machining.
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Corrosion Resistance:
- Moderate resistance to corrosion, making it suitable for various environments.
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Wear Resistance:
- Excellent wear resistance, which is advantageous in applications subject to friction.
Common Applications
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Electrical Components: Used in connectors and terminals due to its good conductivity and strength.
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Industrial Machinery: Suitable for gears, bearings, and other components requiring durability.
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Automotive Parts: Employed in automotive applications where high wear resistance is needed.
Fabrication
CuMn7Sn can be processed through various methods, including:
- Machining: Suitable for precision machining and shaping.
- Welding: Can be welded using appropriate techniques for copper alloys.
- Casting: Often used in casting processes for complex shapes.
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