Constantan Wire (Ni-Cu)
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Constantan wire is produced from a resistance alloy made up of copper and nickel as primary components. This type of material has a low temperature coefficient of resistance and a wide operating temperature range (below 500℃).
Many use these resistance wires because of their mechanical durability and high resistance to corrosion.
They are often applied for variable and strain resistance elements in a different electrical instruments.
Chemical Composition:| Name | Code | Main Composition (%) | Density | |||
| Cu | Mn | Ni | Cr | g/mm2 | ||
| Constantan | 6J40 | Bal. | 1~2 | 39~41 | - | 8.9 |
| Name | Type | (20 ℃ ) Resistivity (μΩ.m) | (20 ℃ ) Temp. Coeff. Of Resistance (αX10 -6 / ℃ ) | (0~100 ℃ ) Thermal EMF vs. Copper (μv/ ℃ ) | Max. working Temp.( ℃ ) | Elongation (%) | Tensile Strength (N/mm 2 ) |
| Constantan | 6J40 | 0.48±0.03 | ≤±40 | 45 | ≤500 | ≥15 | ≥390 |
| Diameter(mm) | 0.02~0.028 | 0.032~0.10 | 0.112~0.28 | 0. 315 ~0.50 | 0.56~1.0 | 1.06~1.60 | 1.70~2.12 | 2.24~3.00 | 3.15~4.50 |
| Tolerance (mm) | ±0.002 | ±0.003 | ±0.005 | ±0.010 | ±0.015 | ±0.020 | ±0.025 | ±0.030 | ±0.035 |
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