Constantan-type electric resistance
Product Description
Constantan-type
Constantan is a type of resistance alloy, which is made up of copper and nickel as the main components. It has a low temperature coefficient of resistance (TCR), and a wide operating temperature range (below 500 ℃ ). It has good properties on mechanical working, high resistance of corrosion. It is used for variable and strain resistance elements in alternative instruments.
| Name | Code | Main Composition(%) | Density | |||
| Cu | Mn | Ni | Cr | g/mm² | ||
| Constantan | 6J40 | Bal. | 1~2 | 39~41 | -- | 8.9 |
| Properties | |||||||
| 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/mm2) |
| Constantan | 6J40 | 0.48±0.03 | ≤±40 | 45 | ≤500 | ≥15 | ≥390 |
Diameter and Tolerance
| Dia（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 |
| Tolearance（mm） | ±0.002 | ±0.003 | ±0.005 | ±0.010 | ±0.015 | ±0.020 | ±0.025 | ±0.030 | ±0.035 |