FeCrAl heating alloy

Iron-chromium-aluminum alloy (FeCrAl) is a high-performance iron-based electric heating material with high resistivity, low temperature coefficient of resistance, high operating temperature, and excellent oxidation and corrosion resistance in high-temperature environments. This material is widely used in chemical industry, metallurgy and high-temperature heating equipment to provide durable and stable heating solutions. Heating elements made of iron-chromium-aluminum alloy help optimize energy efficiency and reduce industrial production costs.

0Cr21Al6Nb

0Cr21Al6Nb (Russian brand number Х21Ю6Nb, equivalent to Kanthal A1 grade) is a high-performance iron-chromium-aluminum electric heating alloy. By adding trace amounts of niobium (Nb) to the alloy, the material significantly improves high-temperature creep resistance and mechanical strength while maintaining extremely high resistivity. It is suitable for harsh environments with a maximum operating temperature of 1350°C and is widely used in precision industrial electric furnaces and special heating equipment.

Iron-Chromium-Aluminum Alloy

0Cr21Al6Nb (Kanthal A1)

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✓ ISO 9001 Quality
✓ COC & Test Certificates
✓ Established in 2002
✓ OEM & Custom Sizes

1
Direct Factory Pricing

Buy direct from the mill at factory prices — no trading markups, no middlemen.

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Flexible Payment & Global Delivery

T/T, L/C and other international payment terms; small orders shipped in 10-30 days worldwide from Jiangsu, China.

3
Standards Compliance with MTC

ASTM, DIN, EN and GB compliant grades, with material test certificates including chemical analysis per lot.

4
Custom Sizes & Samples

Wire, strip, tube, plate and rod produced to your drawings, with qualification samples available on request.

5
Export Experience Since 2002

Supplying alloy materials to Europe, the Americas, Asia and the Middle East since 2002, with export documentation support.

6
Engineer Technical Support

Grade selection, tolerance confirmation and application support from our engineering team before you order.

Specifications

Wire 0.05-7.5 mm
Rod 8-50 mm
Flat Wire (0.05-0.35)*(0.5-6.0) mm
Strip/Foil (0.5-2.5)*(5-180) mm

Chemical Composition

Chromium (Cr): 21.0-23.0
Aluminum (Al): 5.0-7.0
Other Additions: Opportune
Iron (Fe): Rest
Niobium (Nb): 0.5

Physical & Mechanical Properties

Grade: 0Cr21Al6Nb
Max. Service Temperature (°C): 1350
Resistivity at 20℃ (μΩ·m): 1.45
Density (g/cm³): 7.1
Thermal Conductivity (KJ/m.h.ºC): 46.1
Coefficient of Lines Expansion (α×10⁻⁶/20~1000ºC): 16
Melting Point (°C): 1510
Tensile Strength (N/mm²): 650-800
Elongation at Rupture (%): >12
Variation of Area (%): 65-75
Bending Frequency (F/R): >5
Hardness (H.B.): 200-260
Continuous Service Time (Hours/ºC): ≥50/1350
Micrographic Structure: Ferrite
Magnetic Properties: Magnetic

Supply Capability

Item	Details
Lead Time	Samples 5-10 days; production 15-30 days
MOQ	Small trial orders accepted
Samples	Available on request
Packaging	Export-standard coil spools / wooden cases
Certificate	COC with chemical composition analysis
Payment	T/T, L/C

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Frequently Asked Questions (FAQ)

What is the role of the added niobium in 0Cr21Al6Nb?

0Cr21Al6Nb adds an appropriate amount of niobium to the iron-chromium-aluminum base. While maintaining a high resistivity of about 1.45μΩ·m, it significantly improves high-temperature creep resistance and mechanical strength, making the component less likely to deform and sag during long-term operation at 1350°C. It is equivalent to Kanthal A1 grade and is used in high-demand applications such as precision industrial electric furnaces and special heating equipment.

What is the maximum operating temperature of 0Cr21Al6Nb? What equipment is it suitable for?

What is the difference between 0Cr21Al6Nb and 0Cr21Al6? How to choose between the two?

What are the chemical composition and physical parameters of 0Cr21Al6Nb?

0Cr21Al6Nb contains chromium 21.0~23.0%, aluminum 5.0~6.0%, niobium is added in appropriate amounts, and iron is the balance; at 20℃, the resistivity is about 1.45μΩ·m, the density is 7.1g/cm³, the thermal conductivity is 46.1KJ/m·h·℃, the linear expansion coefficient is 15×10⁻⁶/℃, and the melting point is about 1500℃, tensile strength 630~780N/mm².

Which imported or Russian brand number does 0Cr21Al6Nb correspond to? What forms are provided?

0Cr21Al6Nb corresponds to the Russian standard Х21Ю6Nb, which is equivalent to Kanthal A1 grade and can be used as an import substitution supply. Form: wire 0.05~7.5mm, rod 8~50mm, flat wire (0.05~0.35)×(0.5~6.0)mm, strip (0.5~2.5)×(5~180)mm, ferrite structure, magnetic.