Project Description

Nichrome 20 (UNS S31008/1.4843)

Nichrome 20 (UNS S31008/1.4843) is an austenitic nickel-chromium alloy for use at temperature up to 1050℃. 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 20
Resistohm 20
Cr25Ni20Х25Н20310SS31008CrNi25 201.4843

Chemical Composition, %

AlloyCSiMnPSCrNiAlFe
Nichrome 20≤0.081.0-3.0≤1.00≤0.020≤0.01524.0-26.019.0-22.0Bal

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)
≥600≥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
110013907.901.040.501319.0AustenitieNon-Magnetic

Life Test

Test Temperature, ℃Continuous Service Time Hours, ℃
1100≥80

Temperature Factor of Resistivity

20℃100℃200℃300℃400℃500℃600℃700℃800℃900℃1000℃1100℃1200℃1300℃
1.001.041.101.141.171.211.231.261.281.301.321.34

Available Products and Specifications

Rod, Bar, Wire and ForgingsGB/T 1234-2012, ASTM B344-01, DIN 17470-1984
Plate, Sheet and StripGB/T 1234-2012, ASTM B344-01, DIN 17470-1984
Pipe and Tube
Welding Product
Others

Features

  • High resistivity
  • Moderate oxidation resistance
  • Good ductility after use
  • Excellent weldability

Applications

  • Terminals attached to nickel chromium heating elements
  • Element fasteners
  • Refractory anchor bolts