Project Description

Nichrome 70 (UNS N06008/2.4658)

Nichrome 70 (UNS N06008/2.4658) is a nickel-chromium alloy (NiCr alloy) for use at temperatures up to 1250℃. The alloy is characterized by high resistivity and good oxidation resistance. It has good ductility after use and excellent weldability.

Equivalent Grades

TrademarkGBGOSTASTMUNSDINW.Nr.NFBSJISSS
Nikrothal 70
Resistohm 70
Cr30Ni70N06008NiCr70 302.4658

Chemical Composition, %

AlloyCSiMnPSCrNiAlFe
Nichrome 70≤0.080.75-1.60≤0.60≤0.020≤0.01528.0-31.0Bal≤0.50≤1.00

Mechanical Properties (RT, Annealed)

Tensile Strength, Rm/MPaElongation, A/%
Dia. >3.00mm (Wire)
Thk. >0.20mm (Strip)
Dia. 0.10-3.00mm (Wire)
Thk. <0.20mm (Strip)
≥650≥25≥20

Physical Properties

Max Working Temp., Melting Point, Density, g/cm3Resistivity, μΩ·m 20℃Specific Heat, J/(g•K)Thermal Conductivity, W/(m•K) 20℃Average Coefficient of Thermal Expansion,α×10-6/℃ 20-1000℃ Micrographic StructureMagnetic Properties
125013808.101.180.461417.0AustenitieNon-Magnetic

 Life Test

Test Temperature, ℃Continuous Service Time Hours, ℃
1250≥50

 Temperature Factor of Resistivity

20℃100℃200℃300℃400℃500℃600℃700℃800℃900℃1000℃1100℃1200℃1300℃
1.0001.0071.0161.0281.0381.0441.0361.0301.0281.0291.0331.0371.043

 Available Products and Specifications

Rod, Bar, Wire and ForgingsGB/T 1234-2012, DIN 17470-1984
Plate, Sheet and StripGB/T 1234-2012, DIN 17470-1984
Pipe and Tube
Welding Product
Others

 Features

  • Great ductility
  • Excellent workability and weldability under high temperature
  • High and stable resistivity
  • Surface oxidation resistance
  • Sufficient high temperature strength
  • Working temperature up 1250℃

 Applications

  • Corrosion resistant electric heating elements in industrial furnaces with reducing atmospheres
  • Highly resistant to oxidation in air
  • Not recommend for use in MgO sheathed heating elements, or applications using nitrogen or carburizing atmospheres