Shanghai Tankii Alloy Material Co.,Ltd
| Payment Terms | T/T,Western Union |
| Supply Ability | 50tons/Month |
| Delivery Time | 15-30days |
| Packaging Details | case |
| Electrical Resistivity (20°C) | 0.48 - 0.49 μΩ·m (48-49 μΩ·cm) |
| Temperature Coefficient of Resistance (TCR) | ±20 to ±40 ppm/°C (adjustable through heat treatment) |
| Maximum Continuous Service Temperature | 400°C |
| Density | 8.9 g/cm³ |
| Melting Point | 1280°C |
| Brand Name | Tankii |
| Model Number | 6J40 /CuNi44 |
| Certification | ISO9001 |
| Place of Origin | China |
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Product Specification
| Payment Terms | T/T,Western Union | Supply Ability | 50tons/Month |
| Delivery Time | 15-30days | Packaging Details | case |
| Electrical Resistivity (20°C) | 0.48 - 0.49 μΩ·m (48-49 μΩ·cm) | Temperature Coefficient of Resistance (TCR) | ±20 to ±40 ppm/°C (adjustable through heat treatment) |
| Maximum Continuous Service Temperature | 400°C | Density | 8.9 g/cm³ |
| Melting Point | 1280°C | Brand Name | Tankii |
| Model Number | 6J40 /CuNi44 | Certification | ISO9001 |
| Place of Origin | China | ||
| High Light | Constantan alloy resistance foil ，ultra-thin copper nickel strip ，6J40 resistance alloy foil | ||
Constantan Alloy 6J40 Copper Nickel Foil / Ultra-thin Resistance Strip
Constantan 6J40 (also known as CuNi40, CuNi44, NC50, Eureka, Konstantan, or Cuprothal) is a copper-nickel precision resistance alloy containing approximately 40-44% nickel. It is characterized by high electrical resistivity, low temperature coefficient of resistance (TCR), and excellent corrosion resistance. The ultra-thin foil and strip forms are specifically designed for precision resistors, strain gauges, and shunt applications.
| Element | Content (%) |
|---|---|
| Nickel (Ni) | 39 - 44% |
| Manganese (Mn) | 1.0 - 2.0% |
| Copper (Cu) | Balance |
| Iron (Fe) | ≤0.5% |
| Silicon (Si) | ≤0.5% |
| Cadmium (Cd) | ND (Not Detected) |
| Lead (Pb) | ND |
| Mercury (Hg) | ND |
| Chromium (Cr) | ND |
| Property | Value |
|---|---|
| Electrical Resistivity (20°C) | 0.48 - 0.49 μΩ·m (48-49 μΩ·cm)
|
| Temperature Coefficient of Resistance (TCR) | ±20 to ±40 ppm/°C (adjustable through heat treatment)
|
| Maximum Continuous Service Temperature | 400°C
|
| Density | 8.9 g/cm³
|
| Melting Point | 1280°C |
| Thermal EMF vs. Copper (0-100°C) | -43 μV/°C
|
| Thermal Conductivity | 21.2 - 23 W/m·K
|
| Thermal Expansion Coefficient (20-100°C) | 14.9 - 15 × 10⁻⁶/°C
|
| Specific Heat | 0.41 J/g·K |
| Condition | Tensile Strength | Elongation |
|---|---|---|
| Annealed (Soft) | 340 - 535 MPa | ≥25%
|
| Cold Rolled | 680 - 1070 MPa | ≥2%
|
| Typical Yield Strength | 250 MPa | - |
Company Details
Business Type:
Manufacturer,Exporter
Year Established:
1981
Total Annual:
8000000-100000000
Employee Number:
90~100
Ecer Certification：
Verified Supplier
Shanghai Tankii Alloy Material Co., Ltd.specialized in production of Resistance Heating Alloy, Nickel Chromium Alloy, Iron Chromium Aluminum Alloy, Nickel Aluminum Alloy, Manganin, Copper Nickel Alloy, thermocouple wire, pure nickel and other precision alloy materials in the form of round wire, ribb... Shanghai Tankii Alloy Material Co., Ltd.specialized in production of Resistance Heating Alloy, Nickel Chromium Alloy, Iron Chromium Aluminum Alloy, Nickel Aluminum Alloy, Manganin, Copper Nickel Alloy, thermocouple wire, pure nickel and other precision alloy materials in the form of round wire, ribb...
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