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Nickel-Chromium Stranded Resistance Heating Wire

Heat treatment processes often require consistent and accurate performance from resistance wires. To meet these demands, OHMALLOY closely collaborated with cable manufacturers to develop high-quality stranded resistance wires, including FeCrAl, NiCr, NiMn, and pure nickel varieties. These wires are designed to deliver stable electrical resistance and exceptional durability in challenging thermal conditions.

Nickel-chromium wire is known for its high resistivity, excellent oxidation resistance, and ability to withstand elevated temperatures. It also maintains good mechanical strength and weldability, making it suitable for various industrial heating applications.

Specifications
Alloy Nominal composition % Resistivity Max Temp
Ni Cr Fe Al Mn (Ωmm2/m) ℃
NiCr80/20 80 20       1.09 1200
NiCr60/15 60 16 Bal     1.11 1150
OCr23Al5   22 Bal 4.8   1.35 1300
OCr20Al5   22 Bal 5.3   1.39 1300
Pure Nickel 99.6         0.09  
NiMn2 98       2 0.11  
Standard stranded wire sizes
Alloy Nominal OD N° of strands Strand diameter Electrical resistance Length
mm   mm Ω/m m/kg
NiCr80/20 2.7 19*0.523 0.574 0.285 29
NiCr60/15 2.76 19*0.523 0.574 0.29 30
NiCr80/20 2.76 37*0.385 0.45 0.279 28
Nickel 2.87 19*0.574 0.574 0.0198 21
NiMn2 2.87 19*0.574 0.71 0.0234 22
Applications

Stranded resistance heating wire is suitable for use in ceramic pad heater components, such as:

  • Heating Wire
  • Ceramic Bead
  • Male&female connector
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