CuNi40 Cuprothal 294 Copper Nickel Alloy Constantan Strip CuNi40 /
CuNi44 Constant Size 0.005mm * 100mm
Copper nickel alloy includes : Constantan CuNi40 (6J40), CuNi1,
CuNi2, CuNi6, CuNi8, CuNi10, CuNi14, CuNi19,
CuNi23CuNi30, CuNi34, CuNi44.
1. Constantan
Product Details:
Grade: 6J40 also known as cuni40
Nature: With 40% nickel, 1.5% copper manganese alloy
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°C). It
has good properities on mechanical working, high resistance of
corrosion. It is used for variable and strain resistance
of corrosion. It is used for variable and strain resisitance
elements in alternative instruments.
Our products have the following features: Stable performance, high
resistivity, high working temperature, allowable high surface load,
small specific gravity and reasonable price.
2. constantan dimension available
Wire: 0.018-10mm Ribbons: 0.05*0.2-2.0*6.0mm
Strip: 0.005*5.0-5.0*250mm
Bars: OD 4-100mm
3. Chemical composition and main properties of constantan
Name | Code | Main Composition (%) | Density (g/mm2) |
Cu | Mn | Ni | Cr |
Constantan | 6J40 | Bal. | 1-2 | 39-41 | - | 8.9 |
| Type | (20º C ) Resistivity (μ Ω. M) | (20º C ) Temp. Coff. of Resistance (α×10-6/°C) | (0-100º C ) Thermal EMF vs. Copper (μV/º C )
| Max. Working Temp.(º C )
| Elongation (%) | Tensile Strength (Mpa) |
Constantan | 6J40 | 0.48 ±0.03 | +40 | 45 | ≤500 | ≥15 | ≥390 |
Charact eristic | Resistivity ( 200C μΩ.m) | Max.working Temperature ( 0C) | Tensile Strength (Mpa) | Melting point (0C) | Density ( g/cm3) | TCR x10-6/ 0C (20~600 0C) | EMF vs Cu (μV/ 0C) (0~100 0C) |
Alloy Nomenc lature |
NC003 (CuNi1) | 0.03 | 200 | 210 | 1085 | 8.9 | <100 | -8 |
NC005 (CuNi2) | 0.05 | 200 | 220 | 1090 | 8.9 | <120 | -12 |
NC010 (CuNi6) | 0.1 | 220 | 250 | 1095 | 8.9 | <60 | -18 |
NC012 (CuNi8) | 0.12 | 250 | 270 | 1097 | 8.9 | <57 | -22 |
NC015 (CuNi10) | 0.15 | 250 | 290 | 1100 | 8.9 | <50 | -25 |
NC020 (CuNi14) | 0.2 | 300 | 310 | 1115 | 8.9 | <30 | -28 |
NC025 (CuNi19) | 0.25 | 300 | 340 | 1135 | 8.9 | <25 | -32 |
NC030 (CuNi23) | 0.3 | 300 | 350 | 1150 | 8.9 | <16 | -34 |
NC035 (CuNi30) | 0.35 | 350 | 400 | 1170 | 8.9 | <10 | -37 |
NC040 (CuNi34) | 0.4 | 350 | 400 | 1180 | 8.9 | 0 | -39 |
NC050 (CuNi44) | 0.5 | 400 | 420 | 1200 | 8.9 | <-6 | -43 |
4. cuni resistance alloy application
CuNi alloy wires and strip typically used in heating cables, fuses,
resistors and various types of controllers, electric car
controller, the
instruments and meters, the integrated circuit, the sample electric
current, the resistor. And low pressure resistance and so on.
Resistance Alloy- Constantan Sizes / Temper Capabilities
1; Condition: Bright, Annealed, Soft
2; Wire diameter 0.02mm-1.0mm packing in spool, big than 1.0mm
packing in coil
3; Rod, Bar diameter 1mm-30mm
4; Strip: Thickness 0.05mm-7mm, Width 1mm-280mm
