Kral 277

Available Grades:1Cr13AL4、0Cr25AL5、0Cr21AL6、0Cr23Al5、0Cr21Al4、0Cr21AL6Nb、0Cr27AL7Mo2 The product has high resistivity, low temperature coefficient, good oxidation resistance, but also has the advantages of high temperature resistance, light weight and cheap price, but the plasticity is poor and not easy to weld, and the grain increases after high temperature heating, brittleness. The products are used to make heating materials in industrial electric furnaces, household electric furnaces, and infrared heating devices.

Main properties of iron-chromium-aluminum high-resistance electrothermal alloys

Chemical composition (%)

Cr %

Al %

Re %

Fe %

Mo %

26.5-27.8

6.0-7.0

Appropriate Amount

Bal.

1.8-2.2

Continuous operating temperature (℃)

1400

Room temperature resistance (Ω·mm2·m)

1.53
±0.07

Density (g/cm3)

7.1

Thermal conductivity (KJ/m·h·℃)

45.2

Coefficient of linear expansion (α×10-6 ℃)

16

Melting point (℃)

1520

Tensile strength (N/mm2)

680-830

Elongation (%)

>10

Section shrinkage (%)

65-75

Number of repeated bends y (F/R)

>5

Hardness (H.B.)

200-260

Continuous working hours

≥50/1350

Microstructure

Ferrite

Magnetic or not

Yes


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