Features and Application Notes
A-COPPER 2.5 is especially characterized by very low resistivity.
This alloy is used for heating wires and mats in heating cords and
in heating cables with low conductor temperatures as well as tube
weldings. It provides a relatively high corrosion resistance. Flat
wires and ribbons are used for protective switches. The maximum
working temperature in air is +200 °C.
Form of Delivery
A-COPPER 2.5 is supplied in the form of round wires in the range
0.05 to 8.00 mm Ø and stranded wires. On request, larger quantities
can be delivered in other forms.
1) A-COPPER 2.5 must not be confused with A-COPPER 11, the latter being exclusively used for thermo compensation cables according to IEC 60584.
2) A-COPPER 2.5 is not a standardized alloy.
3) This value applies to wires of 2.0 mm diameter. For thinner wires the minimum values will substantially increase, depending on the dimensions.
Notes on Treatment // A-COPPER 2.5 can be worked easily.
This alloy can be soldered and brazed without difficulty. All
known welding methods can be used.
Brand
Name
A-COPPER 2.5
1)
Material
Code
Abbreviation
CuNi1
2)
Chemical Composition (mass components) in %.
Average values of alloy components
Cu
Rem.
Ni
0.6
1/3 Data sheets // A-COPPER 2.5 // 7
Strength Properties at +20 °C in Annealed Condition
Tensile Strength
3)
Elongation (L
0
= 100 mm) % at nominal diameter in mm
MPa psi
0.020 to 0.063 > 0.063 to 0.125 > 0.125 to 0.50 > 0.50 to 1.00 > 1.00
220 32,000 < 10 ≈ 10 ≈ 15 ≥ 20 ≥ 25
Electrical Resistance in Annealed Condition
Temperature coefficient
of electrical
resistance between
Electrical resistivity in: µΩ x cm (first line) and Ω/CMF (second line)
Reference Values
+20 °C and +105 °C
10
-6
/K
+20 °C
tolerance ±10 %
+100 °C +200 °C +300 °C +400 °C +500 °C
approx. +3,000 2.5 3.1 3.9
15 18 24
Physical Characteristics (Reference Values)
Density at +20 °C
Melting point
Specific heat
at +20 °C
Thermal conductiv-
ity at +20 °C
Average linear thermal expansion coefficient
between +20 °C and
Thermal EMF
against copper at
+100 °C +400 °C +20 °C
g/cm³ lb/cub in °C J/g K W/m K 10
-6
/K 10
-6
/K µV/K
8.90 0,32 1,085 0.38 ≈ 200.00 17.00 18.00 -6.40
Issue 29-March-2014
2/3 Data sheets // A-COPPER 2.5 // 7
Nominal Diameter
mm
Cross Section
mm²
Weight
per 1.000 m
g
DC Resistance Referred to Length at +20 °C
Ω/m
Nominal Value
Tolerance Minimum Value Maximum Value
0.050 0.00196350 17.50 12.7
0.056 0.00246301 21.90 10.2
0.060 0.00282743 25.20 8.84
0.063 0.00311725 27.70 8.02
0.070 0.00384845 34.30 6.50
0.071 0.00395919 35.20 6.31
0.080 0.00502655 44.70 4.97
0.090 0.0063617 56.60 3.93
0.100 0.0078540 69.90 3.18
0.110 0.0095033 84.60 2.63
0.112 0.0098520 87.70 2.54
0.120 0.0113097 101.00 2.21
0.125 0.0122718 109.00 2.04
0.130 0.0132732 118.00 1.88
0.140 0.0153938 137.00 1.62
0.150 0.017671 157.00 1.41
0.160 0.020106 179.00 1.24
0.180 0.025447 226.00 0.982
0.200 0.031416 280.00 0.796
0.220 0.038013 338.00 0.658
0.224 0.039408 351.00 0.634
0.250 0.049087 437.00 0.509
0.280 0.061575 548.00 0.406
0.300 0.070686 629.00 0.354
0.315 0.07793 694.00 0.321
0.350 0.09621 856.00 0.260
0.355 0.09898 881.00 0.253
0.400 0.1257 1,120.00 0.199
0.450 0.1590 1,420.00 0.157
0.500 0.1963 1,750.00 0.127
0.550 0.2376 2,110.00 0.105
0.560 0.2463 2,190.00 0.102
Tolerance values upon request
Issue 29-March-2014