C70250 Copper Alloy Strip/Foil Description
C70250 Copper Alloy Strip/Foil is an optimized copper-nickel-silicon alloy that can be hardened through cold forming and precipitation of NiSi phases during heat treatment. It offers excellent bendability, superior hot and cold forming properties, high strength, and good corrosion resistance. The NiSi precipitations provide exceptional relaxation properties, even at temperatures up to 150°C. With a tin coating, the alloy maintains its integrity, preventing the tin from peeling off, even after 3,000 hours at 150°C. Additionally, CuNi3Si boasts good electrical and thermal conductivity, along with favorable welding, soldering, and brazing properties.
C70250 Copper Alloy Strip/Foil Specifications
Chemical Composition
|
Ni: 2.2-4.2
Si: 0.25-1.2
Mg: 0.05-0.3
Cu: Bal.
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Density (g/cm3)
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8.82
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Coefficient of Thermal Expansion (10-6/K)
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17.3
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Thermal Conductivity, W/(m·K)
|
190
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Annealing (%IACS) 20℃
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≧40
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Thickness
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≥0.10mm
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Width
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≥3mm
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Physical Properties
Grade
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Temper
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Vickers Hardness
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Elongation %
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C70250
|
R620
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180-220
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≧10
|
R650
|
200-240
|
≧7
|
R690
|
220-260
|
≧5
|
R760
|
210-250
|
≧7
|
C70250 Copper Alloy Strip/Foil Applications
- Electrical connectors
- Spring contacts
- Lead frames for semiconductor devices
- Switches and relays
- Terminals
- Automotive electrical components
C70250 Copper Alloy Strip/Foil Packaging
Our C70250 Copper Alloy Strip/Foil is carefully handled during storage and transportation to preserve the quality of our product in its original condition.
FAQs
Q1: What is C70250 copper alloy strip?
C70250 is a high-performance copper-nickel-silicon alloy known for its excellent combination of strength, electrical cond uctivity, and resistance to stress relaxation. It is widely used in the electrical and electronics industries.
Q2: Is C70250 copper alloy strip resistant to corrosion?
Yes, C70250 offers good corrosion resistance, making it suitable for use in various environments.
Q3: How is C70250 copper alloy strip typically processed?
Cold Working: Processes such as rolling and drawing enhance mechanical properties.
Heat Treatment: Optimizes the alloy's properties for specific applications.