0Cr21Al6 is a ferritic FeCrAl alloy designed to offer exceptional resistance to oxidation, corrosion, and thermal fatigue under prolonged high-temperature service. It contains approximately 21% chromium and 6% aluminum, giving it superior resistance to scaling and oxidation at temperatures up to 1300°C. The alloy’s high electrical resistivity and stable performance make it a reliable material for manufacturing heating elements and furnace parts that require long service life and consistent heat output.
At DLX Alloy, we focus on producing 0Cr21Al6 heating alloy rods with precise chemical control, smooth surfaces, and uniform microstructures. Our advanced production techniques ensure consistent performance and extended lifespan even in harsh industrial environments.
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The 0Cr21Al6 heating alloy rod is widely used across industries that demand long-term high-temperature operation and stable heating output, including:
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Industrial furnaces: Heating elements, radiant tubes, and resistance rods.
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Household and commercial heating systems: Electric ovens, dryers, and infrared heaters.
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Ceramic and glass manufacturing: Support rods, furnace frameworks, and thermal protection systems.
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Metallurgy and chemical processing: Heating and heat treatment equipment.
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Renewable energy systems: Components for solar and battery heating modules.
Its combination of durability, high oxidation resistance, and long lifespan reduces maintenance costs and downtime—key factors in modern industrial applications.
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Alloy Nomenclature Performance |
0Cr21Al6 |
0Cr21Al4 |
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|
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 |
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|
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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The demand for high-temperature alloys such as 0Cr21Al6 has grown steadily, driven by the rapid development of energy-efficient and automated heating technologies. Industries today require materials that not only withstand extreme heat but also maintain consistent performance to minimize energy loss.
In electric heating and furnace manufacturing, reliability and lifespan are becoming key differentiators. Materials that can endure thermal cycling without degradation—like FeCrAl alloys—are replacing traditional NiCr materials in many systems.
At DLX Alloy, we’ve observed a shift toward materials that balance cost-effectiveness and performance. 0Cr21Al6 stands out for offering an excellent price-performance ratio. It provides similar temperature stability to higher-cost alternatives but with improved oxidation resistance and longer service life.
Additionally, as sustainability becomes a greater industry focus, long-life alloys such as 0Cr21Al6 contribute to energy conservation by maintaining consistent resistance and reducing the need for frequent replacements.
| Element | Typical Composition (%) |
|---|---|
| Fe | Balance |
| Cr | 20.0 – 22.0 |
| Al | 5.0 – 6.5 |
| Mn | ≤0.5 |
| Si | ≤0.7 |
| C | ≤0.08 |
| S | ≤0.02 |
| Property | Typical Value |
|---|---|
| Density | 7.1 g/cm³ |
| Melting Point | ~1500°C |
| Maximum Operating Temperature (Air) | 1300°C |
| Electrical Resistivity at 20°C | 1.4 μΩ·m |
| Coefficient of Linear Expansion (20–1000°C) | 14 ×10⁻⁶ /°C |
| Magnetic Property | Ferritic (magnetic) |
At DLX Alloy, our advantage lies in the precision of our material processing and the reliability of our quality control.
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Advanced Production Equipment: We use vacuum melting and controlled atmosphere heat treatment to ensure chemical uniformity and purity.
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Strict Dimensional Tolerances: Each rod is drawn and ground to meet specific customer requirements.
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Performance Testing: Our in-house laboratories conduct oxidation, resistivity, and mechanical property tests for every production batch.
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Global Supply Capability: We serve clients across Europe, South Asia, and North America, ensuring consistent quality and fast delivery.
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Customized Solutions: DLX engineers can tailor compositions and dimensions according to customer application needs—ideal for furnace manufacturers and heating equipment producers.
Through years of production experience, DLX has established itself as a trusted supplier for industries that rely on long-lasting heating materials.
| Parameter | 0Cr21Al6 (DLX) | FeCrAl 0Cr19Al3 |
|---|---|---|
| Max Service Temperature | 1300°C | 1250°C |
| Aluminum Content | 6% | 3% |
| Oxidation Resistance | Excellent | Very Good |
| Lifespan in Furnace Use | Long | Moderate |
| Electrical Resistivity | 1.4 μΩ·m | 1.3 μΩ·m |
| Price | Moderate | Slightly Lower |
| Typical Application | Furnace rods, high-temp heaters | General heating wire |
This comparison shows why 0Cr21Al6 is ideal for users who require enhanced oxidation resistance and longer operational life in demanding high-temperature settings.
The global high-temperature alloy market continues to expand with increased investment in electric heating technologies, renewable energy, and high-efficiency industrial furnaces. As regulations push for lower emissions and higher efficiency, the demand for alloys like 0Cr21Al6—known for both strength and stability—will continue to grow.
With global industries upgrading to more durable and cleaner energy systems, DLX Alloy remains at the forefront of supplying advanced FeCrAl materials. Our 0Cr21Al6 products align with the ongoing industrial transformation toward smarter, more sustainable production methods.
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 makes 0Cr21Al6 different from standard FeCrAl alloys?
It has higher aluminum and chromium content, which improves oxidation resistance and extends service life in high-temperature conditions.
2. What is the maximum working temperature for 0Cr21Al6?
It can operate stably up to 1300°C in air without significant scaling or corrosion.
3. Can DLX provide customized rod dimensions?
Yes, DLX offers customized diameters, lengths, and surface finishes according to customer design or furnace specifications.
4. How does 0Cr21Al6 compare with NiCr alloys?
While NiCr alloys have good ductility, 0Cr21Al6 offers higher oxidation resistance and a longer lifespan at elevated temperatures.
5. What industries use 0Cr21Al6 most frequently?
Mainly heating equipment, metallurgical furnaces, and renewable energy systems.
6. Is this alloy magnetic?
Yes, 0Cr21Al6 is ferritic, which means it is magnetic.
7. How does DLX ensure quality consistency?
Each batch undergoes vacuum melting, surface inspection, and resistivity testing before shipment.
8. What’s the typical delivery time for DLX alloy rods?
Depending on order volume and customization, standard lead time is around 2–4 weeks.