Project Description

Nichrome 20 (S31008/1.4843)

Nichrome 20 is an austenitic nickel-chromium alloy (NiCr alloy) for use at temperatures up to 1050℃. .

Equivalent Grades

TrademarksGBJISASTMUNSDINW-Nr.ГОСТBSNFSS
Nikrothal 201Cr25Ni20Si2SUS 310STP 310SS31008CrNi25 20
X8CrNi 25-21
1.4843
1.4845
20Х23Н18
Х25Н20
X8CrNi 25-21Z8CN25-202361

Specifications

GB/T 1234-1995 (CN); JIS C2520-199(JP); ASTM B344-01(USA); DIN 17470-1984(GER); GOST 10994 & GOST 12766/1-1990 (RU)

Product Forms

Wire, Bar, Strip, Sheet, Plate, Tube, Mesh, Conveyor belt, Radiant tube heater

Chemical Composition, %

AlloyCSiMnPSCrNiAlFe
Nichrome 20≤0.081.5~3.0≤1.0≤0.02≤0.01524.0~26.019.0~22.0Bal

Mechanical Properties (RT, Annealed)

Tensile Strength, Rm/MPaElongation, A/%
Dia. >3.00mm (for wire)Dia. 0.10~3.00mm (for wire) and Th. >0.20 (for strip)
≥600≥25≥20

Physical Properties

Max Working Temperature, ℃Melting Point, ℃Density, g/cm3Resistivity, μΩ·m, 20℃Specific Heat, J/g·℃Thermal Conductivity, KJ/m·h·℃Average Coefficient of Linear Expansion, α×10-6/℃ (20~1000℃)Micrographic StructureMagnetic Properties
105013807.900.950.50043.819.0AustenitieWeak-Magnetic

Life Test

Test Temperature, ℃Continuous Service Time Hours, ℃
1050≥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

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.