OCr21Al6

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

OCr21Al6

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

High resistivity

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

Low temperature coefficient of resistance

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

High operating temperature

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

Low price

It is also inexpensive and is 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
OCr21A6						19.0～22.0	≤0.60	5.0-7.0	Remainder	Remainder

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	Structure	Magnetic Properties
OCr21Al6	1250	1500	7.16	1.42+0.07	0.52	63	14.7	Ferrite	Magnetic Properties

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
OCr21Al6	Annealed	637~784		12

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