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Tankii 0.8mm CuMn8Ni Manganin Wire Wear Resistant Electrical Conductive Wire
Product Description
CuMn8Ni Manganin Wire (0.8mm Diameter)
Product Overview
CuMn8Ni manganin wire (0.8mm diameter) from Tankii Alloy Material is a high-precision copper-manganese-nickel alloy wire with a bright, uniform surface finish as shown. Composed of Cu (balance) + 7.0–9.0% Mn + 1.0–2.0% Ni with trace stabilizing elements, it is produced via vacuum smelting, hot rolling, multi-pass precision drawing, and controlled annealing. It features ultra-low temperature coefficient of resistance (TCR), stable resistivity, and excellent mechanical ductility, making it ideal for precision wirewound resistors, current shunts, strain gauges, and high-frequency signal components requiring long-term stability and reliable performance.
Standard Designations & Core Material Foundation
- Alloy Grade: CuMn8Ni
- International Equivalents:
- UNS: C18500
- DIN: 2.0870
- JIS: C1850
- GB/T: 3131-2019 (Mn8Ni)
- Key Specification: 0.8mm diameter (tolerance: ±0.005mm); soft/half-hard/hard temper available
- Chemical Composition (wt%): Mn: 7.0–9.0%; Ni: 1.0–2.0%; Cu: balance; Fe ≤0.3%; Pb ≤0.05%; C ≤0.1%
- Compliant Standards: ASTM B124, EN 13602, GB/T 3131-2019, RoHS 2.0
- Manufacturer: Tankii Alloy Material, certified to ISO 9001 and ISO 14001
Key Core Advantages (Centered on 0.8mm Fine Wire)
1. Ultra-Stable Electrical Performance
- Low TCR & Stable Resistivity: Resistivity = 0.30 μΩ·m (20℃), TCR = ±8×10⁻⁶/℃ (0–100℃), ensuring resistance drift ≤0.008%/℃—critical for precision measurement and control circuits.
- Low Signal Attenuation: 0.8mm diameter balances conductivity and flexibility, minimizing signal loss in high-frequency and precision sensing applications.
2. Excellent Mechanical & Processing Properties
- High Ductility & Flexibility: Tensile strength ≥400 MPa (hard temper) / ≥280 MPa (soft temper), elongation ≥25% (soft temper), supporting tight winding (minimum radius ≥1.6mm) and complex forming without breaking.
- Bright Surface & Good Solderability: Polished bright finish (Ra ≤0.6μm) ensures low contact resistance and reliable soldering, ideal for resistor winding and terminal connections.
3. Good Corrosion & Environmental Resistance
- Atmospheric & Mild Corrosion Resistance: Forms a dense oxide film, passes 500-hour ASTM B117 salt spray test without obvious corrosion.
- Wide Operating Temperature: -40℃ to 130℃, stable performance in industrial, automotive, and electronic equipment environments.
Technical Specifications
| Attribute | Value (Typical) |
|---|---|
| Alloy Grade | CuMn8Ni (soft/half-hard/hard temper) |
| Diameter | 0.8mm (±0.005mm, customizable 0.1–3.0mm) |
| Resistivity (20℃) | 0.30 μΩ·m |
| TCR (0–100℃) | ±8×10⁻⁶/℃ |
| Tensile Strength | ≥400 MPa (hard); ≥280 MPa (soft) |
| Elongation | ≥25% (soft temper) |
| Hardness (HV) | 110–140 (hard); 75–95 (soft) |
| Density | 8.88 g/cm³ |
| Surface Finish | Bright polished (Ra ≤0.6μm) |
| Operating Temperature | -40℃ to 130℃ |
Product Specifications
| Item | Specification |
|---|---|
| Supply Form | Spools (1kg/5kg/10kg per spool) |
| Temper | Soft (annealed), Half-Hard, Hard (as-drawn) |
| Surface Treatment | Bright polished, pickled, or tinned (optional) |
| Processability | Winding, bending, soldering, laser welding |
| Packaging | Plastic spool + PE film + carton (anti-oxidation & damage) |
| Customization | Diameter (0.1–3.0mm); length; temper; surface treatment |
Typical Application Scenarios
- Precision Resistors: Wirewound precision resistors, potentiometers, and Wheatstone bridges for multimeters & power analyzers.
- Current Shunts: Medium-current shunts for battery management systems (BMS), power meters, and automotive electronics.
- Strain Gauges & Sensors: Core material for mechanical stress testing and temperature compensation sensors.
- High-Frequency Electronics: Signal conditioning modules, RF circuits, and precision impedance components.
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