FeCrAl alloy wires such as 0Cr25Al5 and 0Cr21Al6Nb have become essential materials in the heating element industry due to their ability to withstand extreme temperatures while maintaining stability and durability. These alloys, part of the iron-chromium-aluminum system, are engineered for high-temperature resistance, superior oxidation performance, and extended service life. At DLX, we produce FeCrAl wires with precision and consistency, serving both domestic and international customers across multiple industries.
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The 0Cr25Al5 alloy contains approximately 25% chromium and 5% aluminum. This formulation promotes the formation of a stable aluminum oxide layer at high temperatures, which protects the wire from scaling and degradation. With a maximum operating temperature of 1,300°C, it is widely used in electric furnaces, household appliances, and general industrial heating applications. Its balance of cost-effectiveness and durability makes it one of the most popular FeCrAl grades.
Alloy Nomenclature Performance | 0Cr23Al5 | 0Cr21Al6Nb | 0Cr27Al7Mo2 | |||||
Chemical Compostion (%) | 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 | |
-- | -- | -- | -- | -- | -- | -- | ||
Max.Continuous service temp. of element | 950 | 1250 | 1250 | 1250 | 1100 | 1350 | 1400 | |
Resistivity at 20C(μΩ.m) | 1.25 | 1.42 | 1.42 | 1.35 | 1.23 | 1.45 | 1.53 | |
Density(g/cm) | 7.4 | 7.1 | 7.16 | 7.25 | 7.35 | 7.1 | 7.1 | |
Thermal Conductivity(KJ/m.h) | 52.7 | 46.1 | 63.2 | 60.2 | 46.9 | 46.1 | -- | |
Coefficient of lines expansion(αx10-6/℃) | 15.4 | 16 | 14.7 | 15 | 13.5 | 16 | 16 | |
Melting Point Approx(degree) | 1450 | 1500 | 1500 | 1500 | 1500 | 1510 | 1520 | |
Tensile Strength(N/mm) | 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 | ≥80/1350 | ≥80/1350 | |
Micrographic structure | Ferrite | Ferrite | Ferrite | Ferrite | Ferrite | Ferrite | Ferrite | |
Magnetic properties | Magnetic | Magnetic | Magnetic | Magnetic | Magnetic | Magnetic | Magnetic | |
Shape | Size (mm) |
Wire | 0.05-7.5 |
Rod | 8-50 |
Ribbon | (0.05-0.35)*(0.5-6.0) |
Strip | (0.5-2.5)*(5-180) |
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On the other hand, 0Cr21Al6Nb is designed with enhanced high-temperature performance in mind. Containing around 21% chromium, 6% aluminum, and a small addition of niobium, this alloy provides improved creep resistance. This means it maintains its mechanical strength under long-term high-stress and high-temperature conditions. It is therefore the preferred choice for furnaces, kilns, and equipment that operate at temperatures close to 1,350°C.
One of the main advantages of FeCrAl alloys compared to nickel-chromium wires is their superior oxidation resistance at high temperatures. While NiCr wires are valued for their ductility and conductivity, they degrade faster in extremely hot environments. FeCrAl alloys, especially 0Cr25Al5 and 0Cr21Al6Nb, form a protective oxide film that extends service life and reduces maintenance costs. For industries where downtime is expensive, this difference translates into significant operational benefits.
Internationally, these alloys are recognized under different standards. In the USA, they are equivalent to Kanthal-type grades. In Germany, DIN standards define similar FeCrAl alloys. France lists them under AFNOR standards, while in Russia, GOST specifications apply. This ensures that DLX’s FeCrAl products can be seamlessly integrated into projects worldwide, meeting the expectations of engineers and manufacturers across multiple regions.
| Property / Alloy | 0Cr25Al5 (FeCrAl) | 0Cr21Al6Nb (FeCrAl-Nb) | NiCr 80/20 | Pure Iron Wire |
|---|---|---|---|---|
| Max Operating Temp (°C) | 1,300 | 1,350 | 1,150 | 500 |
| Resistivity (µΩ·m) | ~1.45 | ~1.39 | ~1.09 | ~0.10 |
| Oxidation Resistance | Excellent | Excellent+ | Good | Poor |
| Creep Resistance | Medium | High | Medium | Low |
| Service Life at High Temp | Very Long | Very Long | Long | Very Short |
| Applications | Heating coils, furnaces, appliances | Furnaces, kilns, high-stress heaters | Industrial heaters, appliances | Low-temp resistors |
Applications of FeCrAl wires are diverse. They are used in the metallurgy sector for high-temperature furnaces, in ceramics for kiln heating elements, in chemical plants for heaters, and in everyday appliances like ovens, hair dryers, and toasters. Their ability to provide consistent heat output while resisting oxidation and creep makes them indispensable in both consumer and industrial applications.
Industry trends highlight the growing demand for energy-efficient and longer-lasting heating solutions. With industries shifting toward electrification and sustainable production, heating elements must withstand higher stress levels while reducing overall energy consumption. FeCrAl alloys, especially high-grade variations like 0Cr21Al6Nb, meet these requirements. They combine reliability, efficiency, and extended service life, making them a future-proof choice.
At DLX, we have invested in advanced furnace technology and precision wire drawing processes to ensure our FeCrAl wires meet strict international standards. Each production batch undergoes resistivity testing, tensile strength analysis, and high-temperature trials to confirm performance. Our ability to deliver consistent quality across large orders has earned the trust of clients in the energy, manufacturing, and appliance industries.
Beyond standard production, DLX offers customization. Customers can request specific diameters, coil configurations, or pre-formed heating elements based on their equipment requirements. This flexibility ensures that our FeCrAl products integrate seamlessly into diverse systems, reducing the need for additional processing and saving valuable time for manufacturers.
When comparing DLX FeCrAl wires with alternatives, the difference lies in durability, quality assurance, and customer support. Lower-cost resistance wires may appear attractive initially but often lead to premature failure and increased maintenance costs. DLX’s FeCrAl wires provide long-term reliability, reducing downtime and delivering better overall value.
Looking forward, the adoption of electric heating in renewable energy projects, green industrial manufacturing, and high-efficiency appliances will only increase the importance of FeCrAl alloys. As industries demand materials capable of sustaining higher performance under extreme conditions, alloys like 0Cr25Al5 and 0Cr21Al6Nb will remain at the forefront.
DLX continues to play a leading role by supplying high-quality FeCrAl wires that balance cost-efficiency with durability. Our global reach, technical expertise, and focus on customer satisfaction allow us to support industries ranging from household appliances to high-tech industrial furnaces. By combining advanced alloy production with client-focused service, DLX ensures that our FeCrAl wires remain the preferred solution for heating applications worldwide.
Our 12,000㎡ factory is equipped with complete capabilities for research, production, testing, and packaging. We strictly adhere to ISO 9001 standards in our production processes, with an annual output of 1,200 tons. This ensures that we meet both quantity and quality demands. Furthermore, all products undergo rigorous simulated environment testing including high temperature, high pressure, and corrosion tests before being dispatched, ensuring they meet customer specifications.For all our clients, we offer timely and multilingual after-sales support and technical consulting, helping you resolve any issues swiftly and efficiently.
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FAQs
What is FeCrAl resistance wire?
FeCrAl is an iron-chromium-aluminum alloy wire designed for high-temperature heating applications with superior oxidation resistance.What are the key compositions of 0Cr25Al5 and 0Cr21Al6Nb?
0Cr25Al5 contains around 25% chromium and 5% aluminum, while 0Cr21Al6Nb has about 21% chromium, 6% aluminum, and a small addition of niobium for structural stability.What operating temperatures can these alloys handle?
0Cr25Al5 can reach up to 1,300°C, while 0Cr21Al6Nb can perform reliably up to 1,350°C due to its enhanced creep resistance.What are the equivalents in international standards?
These alloys correspond to Kanthal A-1 and similar FeCrAl grades in the USA, DIN-based FeCrAl grades in Germany, AFNOR alloys in France, and GOST standards in Russia.Which industries use FeCrAl wires?
They are widely used in metallurgy, ceramics, household appliances, petrochemical processing, and industrial furnaces.How does 0Cr21Al6Nb compare with 0Cr25Al5?
0Cr21Al6Nb has better creep resistance and stability at higher stress and temperature conditions, while 0Cr25Al5 is cost-effective and widely applied.Why is oxidation resistance important?
Oxidation resistance ensures long service life and stability at elevated temperatures by preventing scaling and material degradation.What advantages does DLX offer in FeCrAl production?
DLX ensures strict quality control, precise composition, advanced drawing technology, and offers customization in wire sizes and coil forms.