OCr19Al3

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

Category：

Iron chromium series

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

Message

OCr19Al3

Iron-chromium-aluminum resistance alloys are characterized by high resistivity, low temperature coefficient of resistance, and high operating temperature.

High resistivity

The characteristics of iron-chromium-aluminum resistance alloys are high resistivity, low temperature coefficient of resistance, and high operating temperature.

Low temperature coefficient of resistance

The characteristics of iron-chromium-aluminum resistance alloys are high resistivity, low temperature coefficient of resistance, and high operating temperature.

High operating temperature

The characteristics of iron-chromium-aluminum resistance alloys are high resistivity, low temperature coefficient of resistance, and high operating temperature.

Low price

And it is inexpensive, making it an ideal heating material for industrial furnaces, household appliances, and far-infrared devices.

It has good corrosion resistance at high temperatures, especially suitable for use in atmospheres containing sulfur and sulfides, and is inexpensive, making it an ideal heating material for industrial furnaces, household appliances, and far-infrared devices.

Chemical Composition

Alloy Grade	Chemical Composition (mass fraction)/%
	C	P	S	Mn	Si	Cr	Ni	Al	Fe	RE
	Not more than
OCr19Al3	0.08	0.025	0.020	0.50	≤0.70	18.0～21.0	≤0.60	3.0-4.2	Remainder	Remainder

Physical Properties

Alloy Grade	Maximum operating temperature of element ℃	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	Structure	Magnetic
OCr19Al3	1100	1500	7.35	1.23+0.06	0.49	47	13.5	Ferrite	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
OCr19Al3	Annealed	580	15	12

OCr21Al4

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