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High Temperature FeCrAl Alloy Heating Wire Kan A1 WireFeCrAl Alloy Electric Heater Wire 0Cr21Al6Nb
Product Introduction
0Cr21Al6Nb Wire is a high resistance electric heating alloy wire, the main chemical composition is carbon content ≤0.05%, silicon content ≤0.60%, manganese content ≤0.50%, phosphorus content ≤0.025%, sulfur content ≤0.025%, chromium content 21.0%~23.0%, nickel content ≤0.60%, aluminum content 5.0%~7.0%, niobium content 0.5%, the balance is iron. It has a high resistivity of 1.45μΩ·m (20℃), a density of 7.1 g/cm³, a melting point of about 1475-1510℃, and a maximum operating temperature of up to 1350℃.
This alloy wire has excellent oxidation resistance. Due to the high content of chromium and aluminum, it can form a dense oxide protective film at high temperature, which effectively resists oxidation and corrosion. The addition of niobium improves the creep resistance of the alloy, making it have better stability and reliability at high temperatures. 0Cr21Al6Nb Wire also has a low temperature coefficient of 0～-0.01%/℃, and can maintain a stable resistance value at different temperatures. It is widely used in electric furnace heating elements, heating devices, thermocouples and electric furnace cables. For example, as a heating element, it is mainly used in heat treatment furnaces with a use temperature below 1100℃, especially suitable for continuous furnaces such as stainless steel annealing furnaces.
Parameter
| Shape | Size (mm) |
| Wire | 0.025-8.00mm |
| Rod | 8.00-50.00mm |
| Robbin | (0.05-0.35)*(0.5-6.0)mm |
| Strip | (0.50-2.50)*(5.00-180.00)mm |
| Alloy Nomenclature Performance | 1Cr13Al4 | 0Cr25Al5 | 0Cr21Al6 | 0Cr23Al5 | 0Cr21Al4/ 0Cr19Al3 | 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 | |
| Rest | opportune | opportune | opportune | opportune | opportune | opportune | opportune | |
| Fe | Rest | Rest | Rest | Rest | Rest | Rest | Rest | |
| Others | -- | -- | -- | -- | -- | Nb 0.5 | Mo 1.8-2.2 | |
| 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 | ||
| Line expansion coefficient(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 break(%) | >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 | |
Specific Applications
Advantages and Characteristics
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Related Questions and Answers
Q: What is the density of 0Cr21Al6Nb Wire?
A: The density is about 7.16g/cm³.
Q: What is the thermal conductivity of 0Cr21Al6Nb Wire?
A: The thermal conductivity is about 63.2KJ/mhºC.
Q: What is the expansion coefficient of 0Cr21Al6Nb Wire?
A: The expansion coefficient is about 14.7×10⁻⁶/ºC.
Q: What is the melting point of 0Cr21Al6Nb Wire?
A: The melting point is about 1500ºC.
Q: What are the heat treatment requirements for 0Cr21Al6Nb Wire?
A: The recommended heat treatment system is annealing at 750~850°C and water cooling.
Q: What are the surface treatment methods for 0Cr21Al6Nb Wire?
A: Polishing, wire drawing, coating and other surface treatments can be performed.
