0Cr25Al5 Ferro-Chromium-Aluminum Resistance Wire
Also Known As: Resistohm 142, W.Nr. 1.4765, FCHW-1 / FCHR-1, FeCrAl Ⅱ B, CrAl 25/5, FRCA33, GFC142 / GFC142W, X27Ю5T etc.
Max 1300°C| Chemical Composition (%) | |
|---|---|
| C | ≤0.06 |
| P | ≤0.025 |
| S | ≤0.02 |
| Mn | ≤0.5 |
| Si | ≤0.6 |
| Cr | 23.0–26.0 |
| Ni | ≤0.6 |
| Al | 4.5–6.5 |
| Fe | Remainder |
| Physical Properties | |
| Max. Operating Temp. | 1300°C |
| Resistivity at 20°C (μΩ·m) | 1.42±0.07 |
| Density | 7.1 g/cm³ |
| Thermal Conductivity (20°C) | 13 W/(m·K) |
| Linear Expansion Coeff. (20–1000°C) | 15.0×10⁻⁶/°C |
| Specific Heat Capacity | 0.46 J/(g·K) |
| Approx. Melting Point | 1500°C |
| Elongation (A/%) | ≤3.0mm: ≥12%; >3.0mm: ≥15% |
| Tensile Strength (Rm) | ≥600 MPa |
| Accelerated Life Test | ≥80h/1300°C |
| Microstructure | Ferrite |
| Magnetic Properties | Magnetic |
| Available Forms | |
| Bright & Soft Annealed Wire | 0.05–1.6mm |
| Acid-Pickled / Oxidation Wire | 1.0–12.0mm |
| Golden Color Wire | 1.0–3.9mm |
| Blue Color Wire | 4.0–10.0mm |
| Rods | 6.0–150.0mm |
What Is 0Cr25Al5 FeCrAl Resistance Wire?
0Cr25Al5 is a ferritic iron-chromium-aluminum (FeCrAl) resistance heating alloy containing 23.0–26.0% chromium and 4.5–6.5% aluminum, with a maximum continuous operating temperature of 1300°C and a resistivity of 1.42 ± 0.07 μΩ·m at 20°C. It is supplied as round wire (0.05–12.0 mm), rod (6.0–150.0 mm), flat wire and strip, and is used mainly for industrial furnace and kiln heating elements, electric heating tubes and glass-melting equipment.
0Cr25Al5 is a direct equivalent to Kanthal A-1. It delivers outstanding oxidation resistance and long service life at temperatures up to 1300°C: the alloy forms a protective aluminum oxide (Al&sub2;O&sub3;) layer on its surface, providing excellent resistance against corrosive atmospheres. Its higher resistivity than NiCr alloys means less material is needed for the same element resistance, making it a cost-effective alternative to nickel-based alloys.
Key Advantages
- Excellent oxidation resistance up to 1300°C
- Long service life in oxidizing atmospheres
- Good formability and weldability
- Higher resistivity than NiCr alloys — less material needed
- Cost-effective alternative to nickel-based alloys
- Self-healing Al&sub2;O&sub3; protective oxide layer
Typical Applications
- Industrial furnaces and heat treatment equipment
- Kiln heating elements for ceramic and pottery firing
- Glass manufacturing and annealing processes
- Electric heating tubes and cartridge heaters
- High-temperature resistance wire for laboratory furnaces
- Thermal processing in metallurgical operations
0Cr25Al5 vs Other FeCrAl Grades — Which Resistance Alloy Should You Choose?
All grades below are ferritic iron-chromium-aluminum resistance heating alloys with a self-healing Al2O3 surface layer. They differ in maximum operating temperature, resistivity and alloying additions, which together determine element life and the amount of material required for a given wattage. The figures below are taken from the parameter tables published on our individual grade pages.
| Grade | Max. operating temp. | Resistivity at 20°C (μΩ·m) | Notes |
|---|---|---|---|
| 0Cr25Al5 | 1300°C | 1.42 ± 0.07 | Kanthal A-1 equivalent; best all-round high-temperature choice |
| 0Cr23Al5 | 1300°C | 1.35 ± 0.07 | Kanthal D equivalent; versatile general-purpose grade |
| 0Cr20Al6RE | 1300°C | 1.40 ± 0.07 | Rare-earth enhanced |
| 0Cr21Al6Nb | 1350°C | 1.45 ± 0.07 | Niobium-enhanced for superior strength |
| 0Cr24Al6RE | 1400°C | 1.48 ± 0.07 | Premium rare-earth strengthened alloy |
| 0Cr20Al3 | 1100°C | 1.23 ± 0.07 | Cost-optimized grade |
| 1Cr13Al4 | 950°C | 1.25 ± 0.08 | Ferritic heat-resistant steel |
How to choose: for continuous operation at or below 1300°C in an oxidizing atmosphere, 0Cr25Al5 is the standard and most widely available option; move to 0Cr21Al6Nb when the element must hold its shape and strength at 1350°C; use 0Cr24Al6RE for the most demanding 1400°C duty; and select 1Cr13Al4 or 0Cr20Al3 when the working temperature is below 1100°C and cost is the deciding factor.
Standards & Equivalents
International Standard Cross-Reference for 0Cr25Al5
| GB/T (China) | 0Cr25Al5 |
|---|---|
| Sandvik Kanthal | Kanthal A-1 |
| W.Nr. / EN | 1.4765 |
| DIN | DIN 1.4765 |
| AISI / UNS | Equivalent to UNS S44600 family |
| JIS (Japan) | FeCrAl-1 |
0Cr25Al5 — Frequently Asked Questions
What is the equivalent grade of 0Cr25Al5?
0Cr25Al5 is equivalent to Kanthal A-1 (Sandvik), W.Nr. 1.4765 / DIN 1.4765, JIS FeCrAl-1, and is standardized as 0Cr25Al5 in GB/T 1234-2012. It is also listed as Resistohm 142, FCHW-1 / FCHR-1, FeCrAl II B, CrAl 25/5 and GFC142.
What is the maximum operating temperature of 0Cr25Al5?
The maximum continuous operating temperature is 1300°C in air. The accelerated life test requirement is at least 80 hours at 1300°C.
Is 0Cr25Al5 better than Cr20Ni80 nickel-chromium wire?
They suit different conditions. 0Cr25Al5 reaches 1300°C versus 1200°C for Cr20Ni80, has a higher resistivity (1.42 vs 1.09–1.14 μΩ·m) so less wire is needed for the same wattage, and costs less because it contains no nickel. Cr20Ni80 is stronger, more ductile after service and easier to weld, and is a better choice where mechanical robustness or a non-magnetic element is required. 0Cr25Al5 must not be used in reducing atmospheres or where it will be in prolonged contact with refractory materials containing iron oxide.
What sizes of 0Cr25Al5 wire can you supply?
Bright and soft annealed wire 0.05–1.6 mm, acid-pickled or oxidized wire 1.0–12.0 mm, golden-color wire 1.0–3.9 mm, blue-color wire 4.0–10.0 mm, and rods 6.0–150.0 mm. Flat wire and strip are also available.
Do you provide a test report and datasheet for 0Cr25Al5?
Yes. Every shipment is supplied with a mill test report covering chemical composition and physical properties, and an English datasheet can be downloaded above. OEM diameters, spool sizes and custom packaging are supported.