OCr25Al5

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：

Iron chromium series

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

Message

OCr25Al5

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


High resistivity	Low temperature coefficient of resistance	High operating temperature

Good corrosion resistance at high temperatures, especially suitable for use in atmospheres containing sulfur and sulfides, and low price, is an ideal heating material in 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	Others
	Not more than
OCr25Al5	0.06	0.025	0.020	0.50	≤0.60	23.0～26.0	≤0.60	4.5-6.5	Remainder	—

Physical Properties

Alloy Grade	Maximum operating temperature of component ℃	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
OCr25Al5	1300	1500	7.25	1.42	0.46	13	15.0	Ferrite	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
OCr25Al5	Annealed	600	15	12

none

OCr21Al6

OCr25Al5

High resistivity

Low temperature coefficient of resistance

High operating temperature