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Hot Sale CuNi23/NC030 Strip Nickel Copper Alloy for Electrical & Industrial Use
Product Description
CuNi23 Strip
Product Overview
CuNi23 strip, a high-performance copper-nickel alloy strip meticulously crafted by Tankii Alloy Material, is engineered with a nominal 23% nickel content balanced with copper as the base metal. Leveraging our advanced rolling and annealing technologies, this strip delivers exceptional electrical resistance stability, corrosion resistance, and formability—making it a preferred choice for precision electrical components, decorative applications, and marine hardware. Its unique alloy composition strikes a cost-effective balance between performance and material expense, outperforming lower-nickel CuNi alloys in stability while remaining more affordable than high-nickel grades like CuNi44.
Standard Designations
- Alloy Grade: CuNi23 (Copper-Nickel 23)
- UNS Number: C70600 (closest equivalent; tailored to 23% Ni specification)
- International Standards: Complies with DIN 17664, ASTM B122, and GB/T 2059
- Form: Rolled strip (flat); custom slit widths available
- Manufacturer: Tankii Alloy Material, certified to ISO 9001 for consistent quality control
Key Advantages (vs. Similar Alloys)
CuNi23 strip stands out among copper-nickel alloys for its targeted performance profile:
- Balanced Resistance & Cost: Resistivity of 35-38 μΩ·cm (20°C)—higher than CuNi10 (45 μΩ·cm, but more costly) and lower than pure copper (1.72 μΩ·cm), making it ideal for mid-precision resistive components without overspending.
- Superior Corrosion Resistance: Outperforms brass and pure copper in saltwater, humid, and mild chemical environments; passes 1000-hour ASTM B117 salt spray testing with minimal oxidation.
- Excellent Formability: High ductility enables cold rolling to ultra-thin gauges (0.01mm) and complex stamping (e.g., precision grids, clips) without cracking—surpassing the workability of high-nickel CuNi44.
- Stable Thermal Properties: Low temperature coefficient of resistance (TCR: ±50 ppm/°C, -40°C to 150°C), ensuring minimal resistance drift in temperature-fluctuating industrial settings.
- Attractive Aesthetic: Natural silvery luster eliminates the need for plating, reducing post-processing costs for decorative and architectural applications.
Technical Specifications
| Attribute | Value (Typical) |
|---|---|
| Chemical Composition (wt%) | Cu: 76-78%; Ni: 22-24%; Fe: ≤0.5%; Mn: ≤0.8%; Si: ≤0.1%; C: ≤0.05% |
| Thickness Range | 0.01mm – 2.0mm (tolerance: ±0.001mm for ≤0.1mm; ±0.005mm for >0.1mm) |
| Width Range | 5mm – 600mm (tolerance: ±0.05mm for ≤100mm; ±0.1mm for >100mm) |
| Temper Options | Soft (annealed), Half-hard, Hard (cold-rolled) |
| Tensile Strength | Soft: 350-400 MPa; Half-hard: 450-500 MPa; Hard: 550-600 MPa |
| Yield Strength | Soft: 120-150 MPa; Half-hard: 300-350 MPa; Hard: 450-500 MPa |
| Elongation (25°C) | Soft: ≥30%; Half-hard: 15-25%; Hard: ≤10% |
| Hardness (HV) | Soft: 90-110; Half-hard: 130-150; Hard: 170-190 |
| Resistivity (20°C) | 35-38 μΩ·cm |
| Thermal Conductivity (20°C) | 45 W/(m·K) |
| Operating Temperature Range | -50°C to 250°C (continuous use) |
Product Specifications
| Item | Specification |
|---|---|
| Surface Finish | Bright annealed (Ra ≤0.2μm), matte (Ra ≤0.8μm), or polished (Ra ≤0.1μm) |
| Flatness | ≤0.05mm/m (for thickness ≤0.5mm); ≤0.1mm/m (for thickness >0.5mm) |
| Machinability | Excellent (compatible with CNC cutting, stamping, and bending; minimal tool wear) |
| Weldability | Suitable for TIG/MIG welding and soldering (forms strong, corrosion-resistant joints) |
| Packaging | Vacuum-sealed in moisture-proof bags with desiccants; wooden spools (for rolls) or cartons (for cut sheets) |
| Customization | Slitting to narrow widths (≥5mm), cut-to-length pieces, special tempers, or anti-tarnish coating |
Typical Applications
- Electrical Components: Mid-precision resistors, current shunts, and potentiometer elements—where balanced resistance and cost are critical.
- Marine & Coastal Hardware: Boat fittings, valve stems, and sensor housings—resistant to saltwater corrosion without the expense of high-nickel alloys.
- Decorative & Architectural: Nameplates, trim for appliances, and architectural accents—silver luster and corrosion resistance eliminate plating needs.
- Sensors & Instruments: Thermocouple compensation wires and strain gauge substrates—stable electrical properties ensure measurement accuracy.
- Automotive: Connector terminals and small heating elements—combines formability with resistance to underhood humidity.
Tankii Alloy Material subjects every batch of CuNi23 strip to rigorous testing, including chemical composition analysis, mechanical property verification, and dimensional inspection. Free samples (100mm×100mm) and material test reports (MTR) are available upon request. Our technical team provides tailored support—such as temper selection for stamping or corrosion protection recommendations—to optimize CuNi23 performance for specific applications.
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