0Cr19Al3 is a ferritic heat-resistant alloy belonging to the Fe-Cr-Al (iron-chromium-aluminum) system. The main elements—chromium (19%) and aluminum (3%)—form a strong protective oxide film when heated, providing excellent oxidation and corrosion resistance at elevated temperatures. The alloy maintains good mechanical strength and creep resistance even when exposed to temperatures above 1200°C. Its ferritic structure offers magnetic properties, good thermal conductivity, and superior stability during long-term service.
Compared to austenitic materials, 0Cr19Al3 has lower thermal expansion, better oxidation resistance, and excellent formability for manufacturing heating components, tubes, and furnace accessories. It’s widely used in heating furnaces, chemical reactors, and industrial dryers that demand consistent high-temperature performance.
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Electric heating elements: Ideal for resistance wire rods and strip heaters.
Furnace components: Used for supports, brackets, and radiant tubes in industrial furnaces.
Chemical processing: Corrosion-resistant under oxidizing and sulfur-bearing conditions.
Automotive and metallurgical industries: Applied in exhaust systems, heat exchangers, and reformer components.
Power generation: Used in heating rods and boiler components due to its long service life.
Alloy Nomenclature Performance | 1Cr13Al4 | 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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With the continuous growth of renewable energy, electric heating, and advanced thermal systems, the demand for ferritic heat-resistant steels like 0Cr19Al3 has increased rapidly. Industries are moving toward materials that balance high temperature durability with cost efficiency, replacing older nickel-based alloys in moderate-temperature applications.
Moreover, environmental policies drive industries to use alloys that maintain performance with less material loss and lower energy consumption. DLX Alloy focuses on developing advanced 0Cr19Al3 alloys optimized for longer heating life, high energy efficiency, and stable resistivity for modern industrial furnaces and thermal systems.
Comparison Table
| Property | 0Cr19Al3 | 0Cr21Al4 | 1Cr13Al4 | 0Cr15Al5 |
|---|---|---|---|---|
| Main Elements | Fe-Cr-Al (19Cr, 3Al) | Fe-Cr-Al (21Cr, 4Al) | Fe-Cr-Al (13Cr, 4Al) | Fe-Cr-Al (15Cr, 5Al) |
| Max Operating Temp (°C) | 1250 | 1350 | 1100 | 1200 |
| Oxidation Resistance | Excellent | Superior | Good | Very Good |
| Corrosion Resistance | Excellent | Excellent | Moderate | High |
| Electrical Resistivity (μΩ·m) | 1.35 | 1.40 | 1.25 | 1.30 |
| Strength at High Temp | Strong | Very Strong | Moderate | Strong |
| Magnetism | Ferritic | Ferritic | Ferritic | Ferritic |
| Typical Applications | Industrial heaters, furnaces | High-temp furnaces | Basic heating units | General heat elements |
DLX Company Advantage
At DLX Alloy, we combine precision manufacturing with scientific material control to ensure every 0Cr19Al3 steel bar meets international standards. Our factory utilizes vacuum melting and intermediate frequency furnaces for purity and composition uniformity, eliminating impurities that could reduce oxidation resistance.
We provide customized dimensions, surface finishes, and heat treatment states based on customer application. Whether you need rods for heating elements, high-temperature fixtures, or industrial furnace components, DLX ensures excellent stability, dimensional precision, and consistent resistivity.
DLX’s quality inspection system includes spectral analysis, resistivity testing, and tensile strength measurement, ensuring every batch is traceable and reliable. By focusing on material innovation, we help global partners improve energy efficiency and reduce operational costs.
Article: 0Cr19Al3 in Modern Industry
0Cr19Al3 ferritic heat-resistant steel has become one of the most reliable choices for industrial heating systems that demand durability under thermal stress. In industrial furnaces and heat treatment applications, materials face repeated heating and cooling cycles, which can cause oxidation and scaling. 0Cr19Al3’s Cr-Al oxide film acts as a strong shield, minimizing surface degradation even after thousands of hours of operation.
At DLX Alloy, we see a clear shift in the market toward alloys that combine longevity with cost control. While high-nickel materials once dominated, ferritic FeCrAl alloys like 0Cr19Al3 are now replacing them in many systems due to their excellent performance-to-cost ratio. Our engineering team works closely with end users to optimize alloy composition and heat treatment for enhanced service life in custom furnace setups.
Another growing trend is the integration of heating components into automation and renewable systems. For example, electric vehicle battery heaters and solar-powered heating modules increasingly use FeCrAl-based alloys for their high temperature efficiency and low maintenance needs. DLX’s modern production line ensures each rod maintains consistent resistivity, allowing for stable temperature control in automated heating systems.
In addition, 0Cr19Al3’s versatility makes it a valuable option for both industrial and consumer-grade applications—ranging from kiln heating elements to continuous casting furnaces. It also supports sustainability goals by reducing metal loss from oxidation and extending replacement intervals, directly lowering carbon emissions over time.
By continuously refining production techniques and applying real-time quality monitoring, DLX Alloy ensures every 0Cr19Al3 product performs with reliability that meets or exceeds international expectations. With our export network covering Asia, Europe, and the Americas, DLX has become a trusted supplier for companies seeking high-temperature alloys that deliver long-term stability and efficiency.
About Us:
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
1. What is 0Cr19Al3 alloy mainly used for?
It’s primarily used for heating elements, furnace parts, and oxidation-resistant structures in industrial environments.
2. What’s the maximum working temperature of 0Cr19Al3?
It can operate continuously up to around 1250°C with strong oxidation resistance.
3. How does it compare to nickel-based alloys?
It offers similar oxidation resistance at a much lower cost and is better suited for moderate-to-high temperature systems.
4. Is 0Cr19Al3 magnetic?
Yes, it’s a ferritic alloy, which means it’s magnetic.
5. Can DLX customize the rod size and shape?
Absolutely. DLX provides tailored sizes, surface finishes, and mechanical properties to fit specific furnace and heating designs.
6. How is oxidation resistance achieved?
The aluminum and chromium elements form a dense, stable oxide film that prevents surface corrosion and scaling.
7. What industries use this material most?
It’s widely used in metallurgy, power generation, petrochemical, and electric heating equipment.
8. Why choose DLX Alloy for 0Cr19Al3?
Because DLX ensures purity, consistency, and professional customization, backed by years of experience in high-temperature material production.