Kral 235
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 % |
22.5-24.5 | 4.2-5.0 | Appropriate Amount | Bal. |
Continuous operating temperature (℃) | 1250 |
Room temperature resistance (Ω·mm2·m) | 1.35 |
Density (g/cm3) | 7.25 |
Thermal conductivity (KJ/m·h·℃) | 60.2 |
Coefficient of linear expansion (α×10-6 ℃) | 15 |
Melting point (℃) | 1500 |
Tensile strength (N/mm2) | 630-780 |
Elongation (%) | >12 |
Section shrinkage (%) | 65-75 |
Number of repeated bends y (F/R) | >5 |
Hardness (H.B.) | 200-260 |
Continuous working hours | ≥80/1300 |
Microstructure | Ferrite |
Magnetic or not | Yes |
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