Nichrome Wire

  1. High deformation ability
  2. Good shockproof ability and anti-oxidization in thermal state
  3. Widely used in heating equipment, such as electric furnace, hair dryers, electric ovens, etc.
  4. Wire thickness range from 0.05mm to 14mm.

About Nichrome Wire

Nichrome Wire is a name for a Nickel-Chromium alloy wire. The wire has two types: round wire and flat wire. Nichrome wire is corrosion resistant, and has high melting point of about 1400 °C (2552 °F). It has relatively high resistivity and very good resistance to oxidation at high temperatures. Nichrome Wire is widely used in heating equipment, such as electric furnace, hair dryers, electric ovens, toasters, vacuum coating, inner components of vacuum valves, etching resistor, brake resistor, tube heater, sealer, boiler and even electronic cigarettes.

Nichrome wire has many advantages, such as high deformation ability, good shockproof ability and anti-oxidization in thermal state.
Nichrome wire forms a protective layer of chromium oxide when it is heated for the first time. Material beneath the layer will not oxidize, preventing the wire from breaking or burning out.
Nichrome wire also has good anti-corrosion and high resistant co-efficiency. It is commonly used in ceramics as an internal support structure to help some elements of clay sculptures hold their shape while they are still soft.
Nichrome wire metallurgical structure confers them a very good plasticity when cold. There is a growth of the grain under heat during utilization of the element without inducing embrittlement of it when cold.

Nichrome wire has several grades with different properties, Nichrome 80 is the most widely used one among them.

Nichrome 80 (Ni20Cr80) Wire:
Material property Value Units
Magnetic Attraction None  
Modulus of elasticity 2.2 × 1011 Pa
Specific gravity 8.4 None
Density 8400 kg/m3
Melting point 1400 °C
Electrical resistivity at room temperature 1.0 × 10−6 to 1.5 × 10−6 Ωm
Specific heat 450 Jkg−1°C−1
Thermal conductivity 11.3 Wm−1°C−1
Thermal expansion (20oC to 100oC) 14 × 10−6 °C−1
Temperature Coefficient of Resistivity (25oC to 100oC) 100 ppm/oC
Standard ambient temperature and pressure used unless otherwise noted.
Nichrome Wire Comparison:
Material Nichrome 80 Wire



Nichrome 70 Wire



Nichrome 60 Wire



Cr20Ni3 Wire Cr20Ni30 Wire
Component % Ni Remanent Remanent 55.0~61.0 34.0~37.0 30.0~34.0
Cr 20.0~23.0 28.0~31.0 15.0~18.0 18.0~21.0 18.0~21.0
Fe ≤1.0 ≤1.0 Remanent Remanent Remanent
Highest temperature 1200 1250 1150 1100 1100
Melting point 1400 1380 1390 1390 1390
Density g/cm3 8.4 8.1 8.2 7.9 7.9
Resistance ratio μΩ·m,20 1.09±0.05 1.18±0.05 1.11±0.05 1.04±0.05 1.04±0.05
Extend ratio % ≥20 ≥20 ≥20 ≥20 ≥20
Specific heat J/g. 0.44 0.461 0.494 0.5 0.5
coefficient of heat conductivity  KJ/m.h 60.3 45.2 45.2 43.8 43.8
Wire expand coefficient a×10-6/201000 18 17 17 19 19
Micro-organization Austenite Austenite Austenite Austenite Austenite
Magnetism Non-magnetism Non-magnetism Non-magnetism Non-magnetism Non-magnetism
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