Cr20Ni80

Alloy Category: High Electrical Resistance Alloy Base Material Shape: Wire (Round/Flat Wire) Alloy Series: Nickel-Chromium Alloy Implementation Standard: GB/T1234-2012 Certification: ISO9001:2015

Category：

Nickel-chromium series

Keywords：High resistance electric heating alloy | Corrosion-resistant alloy | Thermal spraying materials

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Cr20Ni80

Cr20Ni80 is a nickel-chromium alloy known for its high resistivity and excellent oxidation resistance. It maintains a stable microstructure and electromechanical properties at high temperatures. Cr20Ni80 also exhibits good high-temperature mechanical properties, cold deformation plasticity, and weldability, making it widely used in industrial furnaces, metallurgy, machinery, electrical appliances, aircraft, automotive manufacturing, and military industries.

Chemical Composition

Alloy Grade	Chemical Composition (Mass Fraction)/%
	C	P	S	Mn	Si	Cr	Ni	Al	Fe	Others
	Not Greater Than
Cr20Ni80	0.08	0.020	0.015	0.60	0.75～1.60	20.0～23.0	Balance	≤0.50	≤1.0	—

Physical Properties

Alloy Grade	Maximum Component Operating Temperature ℃	Melting Point (Approximate) ℃	Density g/cm³	Resistivity (20 ℃) μΩ ·m	Specific Heat Capacity J/(g·K	Thermal Conductivity (20 ℃) W/(m·K)	Average Linear Expansion Coefficient α (20℃~1000 ℃) 10-*/K	Microstructure	Magnetic Properties
Cr20Ni80	1200	1400	8.40	1.09	0.46	15	18.0	Austenite	Non-magnetic

Mechanical Properties

Alloy Grade	Alloy State	Tensile Strength Rm/MPa Not Less Than	Elongation A/% Not Less Than
			All wires with diameter >3.00 mm and nickel-chromium strips with thickness >0.200 mm	All wires with diameter 0.10 mm～3.00 mm and iron-chromium-aluminum strips with thickness >0.200 mm
Cr20Ni80	Solid Solution	650	25	20

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