UNS K92500, 1.4765 Electric Heating Ribbon Spring Strip For
Electric Furnance
Iron-Chrome-Aluminum FeCrAl 0Cr25Al5 resistance heating alloy has high maximum service temperature in air up to 1250oC. Longer
life permits large surface stress to be applied on the alloy.
Lighter weight makes it a more economical resistance heating
material than Nichrome. The electric resistivty remains almost
constant with varying temperatures. Good yield strength and aging
resistance. Outstanding form stability. Greater heat resistance
than austenitic stainless steels therefore it is commonly used in
the heating applications.
Size dimension range:
Wire: 0.01-10mm
Ribbons: 0.05*0.2-2.0*6.0mm
Strip: 0.05*5.0-5.0*250mm
Bar:10-50mm
FeCrAl alloy series: OCr15Al5,1Cr13Al4, 0Cr21Al4, 0Cr21Al6,
0Cr23Al5, 0Cr25Al5, 0Cr21Al6Nb,0Cr27Al7Mo2, and etc.
| Alloy Nomenclature Performance | 1Cr13Al4 | 0Cr25Al5 | 0Cr21Al6 | 0Cr23Al5 | 0Cr21Al4 | 0Cr21Al6Nb | 0Cr27Al7Mo2 |
| Main Chemical composition | Cr | 12.0-15.0 | 23.0-26.0 | 19.0-22.0 | 20.5-23.5 | 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 | 4.2-5.3 | 3.0-4.2 | 5.0-7.0 | 6.0-7.0 |
| Re | opportune | opportune | opportune | opportune | opportune | opportune | opportune |
| Fe | Rest | Rest | Rest | Rest | Rest | Rest | Rest |
| | | | | | | Nb0.5 | Mo1.8-2.2 |
| Max. continuous service temp. of element(°C) | 950 | 1250 | 1250 | 1250 | 1100 | 1350 | 1400 |
| Resistivity at 20ºC(μΩ·m) | 1.25 | 1.42 | 1.42 | 1.35 | 1.23 | 1.45 | 1.53 |
| Density(g/cm3) | 7.4 | 7.1 | 7.16 | 7.25 | 7.35 | 7.1 | 7.1 |
| Thermal conductivity(KJ/m·h·ºC) | 52.7 | 46.1 | 63.2 | 60.2 | 46.9 | 46.1 | -- |
| Coefficient of lines expansion(α×10-6/ºC) | 15.4 | 16 | 14.7 | 15 | 13.5 | 16 | 16 |
| Melting point approx.( ºC) | 1450 | 1500 | 1500 | 1500 | 1500 | 1510 | 1520 |
| Tensile strength(N/mm2) | 580-680 | 630-780 | 630-780 | 630-780 | 600-700 | 650-800 | 680-830 |
| Elongation at rupture(%) | >16 | >12 | >12 | >12 | >12 | >12 | >10 |
| Variation of area(%) | 65-75 | 60-75 | 65-75 | 65-75 | 65-75 | 65-75 | 65-75 |
| Repeat Bending frequency(F/R) | >5 | >5 | >5 | >5 | >5 | >5 | >5 |
| Hardness(H.B.) | 200-260 | 200-260 | 200-260 | 200-260 | 200-260 | 200-260 | 200-260 |
| continuous service time(Hours/ ºC) | -- | ≥80/1300 | ≥80/1300 | ≥80/1300 | ≥80/1250 | ≥50/1350 | ≥50/1350 |
| Micrographic structure | Ferrite | Ferrite | Ferrite | Ferrite | Ferrite | Ferrite | Ferrite |
| Magnetic properties | Magnetic | Magnetic | Magnetic | Magnetic | Magnetic | Magnetic | Magnetic |
