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Alloy Kh20H80-H

Alloy Kh20H80-N

Alloy Kh20H80-N: a classifier of steels and alloys. Below is systematized information on the purpose, chemical composition, types of supply, substitutes, critical point temperature, physical, mechanical, technological and foundry properties for the grade — Alloy X20H80-N.

General data on Cr20Ni80-H alloy

Delivery type
Nichrome Cr20N80, wire Cr20N80, band Cr20N80, bars, including shaped: GOST 12766.4−77. Calibrated rod GOST 12766.3−77. Tape GOST 12766.277, GOST 12766.577. Wire 12766.1−77.
Application
For electric heating elements of furnaces with the limiting working temperature 1100−1200°C and household devices.

Chemical composition of the alloy Kh20H80-H

Chemical element %
Aluminum (Al), not more 0.2
Iron (Fe), not more than 1.0
Silicon (Si) 1.0−1.5
Manganese (Mn), not more than 0.6
Sulfur (S), not more than 0.015
Titanium (Ti), not more than 0.2
Carbon ©, not more than 0.06
Phosphorus (P), not more than 0.02
Chromium (Cr) 20.0−23.0
Zirconium (Zr), not more than 0.5

Mechanical properties of the alloy X20H80-H

Mechanical properties depending on test temperature

t test temperature,°C σB, MPa δ5, % ψ, %
Wire of 0.1−7.5 mm cross-section. Heating at 1200 °C, 20 min, air.
20 656 45 61
700 431 40 40
800 215 70 72
900 92 55 82
1000 71 70 62
1100 35 130 93
1150 27 110 96
1200 22 102 98

Technological properties of the alloy X20H80-H

Weldability
RDS. Do not use gas welding.

Physical properties of the alloy Х20Н80-Н

Test temperature,°C 20 100 200 300 400 500 600 700 800 900
Steel density, pn, kg/m3 8400








Heat transfer coefficient W/(m -°C)
14 16 17 19
23


Electrical resistivity (p, nominal value — m) 1175 1180 1190 1200 1215 1220 1200 1195 1195 1200

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