0Cr21Al6Nb FeCrAl Resistance Wire
Also Known As: Resistohm 145, Aluchrom O, Alchrome 875, Alloy 875, Icralloy 25, Alferon 25, MWS-875, Stablohm 875, Niobium-Enhanced FeCrAl, Kanthal A-1 Modified etc.
Max 1350°C| Chemical Composition (%) | |
|---|---|
| C | ≤0.05 |
| P | ≤0.025 |
| S | ≤0.02 |
| Mn | ≤0.5 |
| Si | ≤0.6 |
| Cr | 21.0–23.0 |
| Ni | ≤0.6 |
| Al | 5.0–7.0 |
| Fe | Remainder |
| Nb | 0.5 |
| Physical Properties | |
| Max. Operating Temp. | 1350°C |
| Resistivity at 20°C (μΩ·m) | 1.45±0.07 |
| Density | 7.10 g/cm³ |
| Thermal Conductivity (20°C) | 13 W/(m·K) |
| Linear Expansion Coeff. (20–1000°C) | 16.0×10⁻⁶/°C |
| Specific Heat Capacity | 0.49 J/(g·K) |
| Approx. Melting Point | 1510°C |
| Elongation (A/%) | ≤3.0mm: ≥10%; >3.0mm: ≥12% |
| Tensile Strength (Rm) | ≥650 MPa |
| Accelerated Life Test | ≥50h/1350°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 |
0Cr21Al6Nb — Niobium-Enhanced High-Temperature Alloy
0Cr21Al6Nb is an advanced FeCrAl alloy enhanced with niobium (columbium) for superior high-temperature strength and creep resistance. The addition of Nb refines the grain structure, significantly improving mechanical properties at elevated temperatures compared to standard FeCrAl alloys. This makes it ideal for demanding applications where structural integrity must be maintained at 1350°C.
Key Advantages
- Superior high-temperature strength up to 1350°C
- Excellent creep resistance under sustained load
- Refined grain structure from niobium addition
- Outstanding oxidation resistance
- Good formability for complex heating element designs
- Long service life in aggressive furnace atmospheres
Typical Applications
- High-temperature industrial furnaces and kilns
- Heat treatment retorts and muffles
- Ceramic and refractory firing kilns
- Sintering furnaces for powder metallurgy
- Glass melting and forming equipment
- Automotive catalytic converter heating elements
Standards & Equivalents
International Standard Cross-Reference for 0Cr21Al6Nb
| GB/T (China) | 0Cr21Al6Nb |
|---|---|
| Sandvik Kanthal | Kanthal A-1 Modified / Kanthal AF |
| Classification | Niobium-Enhanced FeCrAl |
| Key Feature | Grain refinement via Nb addition |