General Description
CrAl 25-5 is a high-temperature ferritic iron-chromium-aluminium alloy (FeCrAl alloy) which is recommended for element temperatures up to 1250°C. It is especially recommended where excellent oxidation and life properties in combination with good form stability properties are required. CrAl 25-5 is used in electrical heating elements in industrial furnaces and in the appliance industry.
CrAl 25-5 is a better grade of FeCrAl heating alloy to replace Kanthal series.
Chemical Composition
| Grade | C% | P% | S% | Mn% | Si% | Cr% | Ni% | Al% | Fe% |
|---|---|---|---|---|---|---|---|---|---|
| CrAl25-5 | Max 0.05 | Max 0.025 | Max 0.025 | Max 0.5 | Max 0.5 | 23.0-26.0 | Max 0.6 | 4.5-6.5 | Bal. |
Physical Properties
Density: 7.1 g/cm3
Max Working Temperature: 1250°C
Melting Point: 1500 °C
Specific Resistance (at 20°C) (µΩ-m): 1.45±0.07
Linear Expansion Coeff. (T=20 – 1000°C) x10-6 : 16.0
Mechanical Properties
Tensile: 637-784 MPa
Elongation: Min 12%
Forms
Wire, Rod, Strip/Foil, Stranded Wire, Heating helix coil are available