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FeCrAl 0Cr23AL5 pipe
Iron-chromium-aluminium (FeCrAl) alloys
FeCrAl alloys are characterized by excellent oxidation resistance and very good form stability resulting in long element life. They are typically used in electrical heating elements in industrial furnaces and home appliances.
FeCrAl alloys have higher service temperature then NiCr Alloys and much lower prices. But they have lower stability and flexibility, easily to be fragile after a time circle.
Main grades and properties
Grades Properties
| 1Cr13Al4 | 0Cr25Al5 | 0Cr21Al6 | 0Cr23Al5 | 0Cr21Al4 | 0Cr21Al6Nb | 0Cr27Al7Mo2 | |
Chemical composition % | Cr | 12.0-15.0 | 23.0-26.0 | 19.0-22.0 | 22.5-24.5 | 18.0-21.0 | 21.0-23.0 | 26.5-27.8 |
Al | 4.0-6.0 | 4.5-6.5 | 5.0-7.0 | 4.2-5.0 | 3.0-4.2 | 5.0-7.0 | 6.0-7.0 | |
Fe | Balance | Balance | Balance | Balance | Balance | Balance | Balance | |
Other |
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| Nb 0.5 | Mo1.8-2.2 | |
Highest service temperature °C | 950 | 1250 | 1250 | 1250 | 1100 | 1350 | 1400 | |
ResistivityμΩ.m,20°C | 1.25 | 1.42 | 1.42 | 1.35 | 1.23 | 1.45 | 1.53 | |
Density (g/cm3 ) | 7.4 | 7.10 | 7.16 | 7.25 | 7.35 | 7.10 | 7.10 | |
Thermal conductivity KJ/m.h.°C | 52.7 | 46.1 | 63.2 | 60.2 | 46.9 | 46.1 | 45.2 | |
Coefficient of linear extensibility α×10-6/°C | 15.4 | 16.0 | 14.7 | 15.0 | 13.5 | 16.0 | 16.0 | |
Melting point °C | 1450 | 1500 | 1500 | 1500 | 1500 | 1510 | 1520 | |
Tensile Mpa | 580-680 | 630-780 | 630-780 | 630-780 | 600-700 | 650-800 | 680-830 | |
Elongation % | >16 | >12 | >12 | >12 | >12 | >12 | >10 | |
Reduction % | 65-75 | 60-75 | 65-75 | 65-75 | 65-75 | 65-75 | 65-75 | |
Hardness H.B. | 200-260 | 200-260 | 200-260 | 200-260 | 200-260 | 200-260 | 200-260 | |
Microstructure | Ferrite | Ferrite | Ferrite | Ferrite | Ferrite | Ferrite | Ferrite | |
Magnetic property | magnetic | magnetic | magnetic | magnetic | magnetic | magnetic | magnetic |
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