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Resistance Wire

Resistance wires are manufactured in our full range of materials. Wire can be supplied to meet both the resistance and mechanical properties required by customer specifications.

Resistance Wire Product Range…

Typical applications for resistance wires produced are…

  • Electrofusion fittings
  • Underfloor heating cables
  • Underground heating
  • Electrical blankets
  • Industrial heating systems

Phosphor Bronze Wires

Composition CuSn5 CuSn6 CuSn1
Copper Balance Balance Balance
Tin 4.5 – 5.5% 5.5 – 6.5% 0.5 – 1.0%
Phosphorus 0.01 – 0.4% 0.01 – 0.4% 0.01 – 0.4%
       
Properties CuSn5 CuSn6 CuSn1
Resistivity at 20oC 0.100 Ω x mm2 /m 0.1408 Ω x mm2 /m 0.030 Ω x mm2 /m
Temperature coeff. of resistance 0.0035 / 1oC > 20oC 0.0065 / 1oC > 20oC 0.0022 / 1oC > 20oC
Density 8.9 kg/m3 8.80 kg/m3 8.90 kg/m3
Tensile Strength in soft condition 350 – 450 N/mm2 370 – 470 N/mm2 270 – 330 N/mm2
Elongation at soft temper >30% >30% >30%

Brass Wires

Properties CuZn5 CuZn10 CuZn15 CuZn20 CuZn30 CuZn37
Copper 95% 89.0-91.0% 84.0-86.0% 79.0-81.0% 69.0-71.0% 62.0-64.0%
Zinc 5% Balance Balance Balance Balance Balance
 
Properties CuZn5 CuZn10 CuZn15 CuZn20 CuZn30 CuZn37
Resistivity
at 20oC		 0.04 Ω x mm2 /m 0.04 Ω x mm2 /m 0.048 Ω x mm2 /m 0.053 Ω x mm2 /m 0.0625 Ω x mm2 /m 0.067 Ω x mm2 /m
Temperature
coeff. of resistance		 0.003 / 1oC > 20oC 0.003 / 1oC > 20oC 0.0028 / 1oC > 20oC 0.0025 / 1oC > 20oC 0.002 / 1oC > 20oC 0.0015 / 1oC > 20oC
Density 8.80 kg/m3 8.80 kg/m3 8.80 kg/m3 8.70 kg/m3 8.50 kg/m3 8.40 kg/m3
Tensile Strength in soft condition 350 - 600 N/mm2 350 - 600 N/mm2 350 - 700  N/mm2 350 - 700  N/mm2 400 - 850  N/mm2 350 - 600  N/mm2
Elongation at
soft temper		 30% 30% 35% 35% 35% 35%

Nickel Silver Wires

Composition CuNi12Zn24 CuNi18Zn20
Copper 63-66% 60-63%
Nickel 11 – 13% 17 – 19%
Zinc Balance Balance

Copper Wires

Composition OFCU
Copper >99.99%
Properties OFCU
Resistivity at 20oC 0.0172 Ω x mm2 /m
Temperature coeff. of resistance 0.00393 / 1oC > 20oC
Density 8.90 kg/m3
Tensile Strength in soft condition 250 - 280 N/mm2
Elongation at soft temper 30%

Aluminium Wires

Other aluminium alloys are available upon request

Composition AlMg5
Aluminium Balance
Magnesium 4.8-6.5%
Properties AlMg5
Resistivity at 20oC 0.0615 Ω x mm2 /m
Density 2.64 kg/m3
Tensile Strength in soft condition 250 - 450 N/mm2
Elongation at soft temper 17%

Copper Nickel Alloys

Composition CuNi1 CuNi2 CuNi6 CuNi10 CuNi15 CuNi25 CuNi44
(Constantan)
Copper 99% 98% 94% 90% 85% 75% 66%
Nickel 1% 2% 6% 10% 15% 25% 44%
Properties CuNi1 CuNi2 CuNi6 CuNi10 CuNi15 CuNi25 CuNi44
(Constantan)
Resistivity
at 20oC		 0.0256 Ω x mm2 /m 0.0435 Ω x mm2 /m 0.0926 Ω x mm2 /m 0.1429 Ω x mm2 /m 0.21 Ω x mm2 /m 0.34 Ω x mm2 /m 0.49 Ω x mm2 /m
Temperature
coeff. of
resistance		 0.003 /
1oC > 20oC		 0.0013 /
1oC > 20oC		 0.0007 /
1oC > 20oC		 0.00063 /
1oC > 20oC		 0.00035 /
1oC > 20oC		 0.0002 /
1oC > 20oC		 0.00004 /
1oC > 20oC
Density 8.9 kg/m3 8.9 kg/m3 8.9 kg/m3 8.9 kg/m3 8.9 kg/m3 8.9 kg/m3 8.9 kg/m3
Tensile Strength in soft condition 230 – 330 N/mm2 240 – 340 N/mm2 250 – 350 N/mm2 300 – 400 N/mm2 320 – 420 N/mm2 350 – 450 N/mm2 400 – 500 N/mm2
Elongation at
soft temper		 >25% >25% >25% >25% >25% >25% >25%

Pure Nickel and other Nickel Alloys

Composition Nickel 201 NiMn2 80/20 NiCr
Nickel 98% 98% 80%
Iron (Fe) 0.40% 0.06%  
Copper 0.25%    
Manganese (Mn)   1.8%  
Chrome (Cr)     20%
Others Total <0.02% Balance  
Properties Nickel 201 NiMn2 80/20 NiCr
Resistivity at 20oC 0.085 Ω x mm2 /m 0.109 Ω x mm2 /m 1.09 Ω x mm2 /m
Temperature coeff. of resistance 0.0050 / 1oC > 20oC 0.0041 / 1oC > 20oC 0.0001 / 1oC > 20oC
Density 8.9 kg/m3 8.81 kg/m3 8.4 kg/m3
Tensile Strength in soft condition 450 – 550 N/mm2 450 – 550 N/mm2 600 – 700 N/mm2
Elongation at soft temper >25% >25% >25%