General Description
CrAl 27-7 made by NiWire Industries, iron-chromium-aluminium alloy (FeCrAl alloy) which is recommended for use at wire temperatures up to 1400°C Max., can replace Kanthal series. In addition to industrial furnaces, it is used in appliances where its high resistivity and good oxidation resistance are of particular importance.
Chemical Composition
| Grade | C% | P% | S% | Mn% | Si% | Cr% | Ni% | Al% | Fe% | Mo% |
|---|---|---|---|---|---|---|---|---|---|---|
| CrAl27-7 | Max 0.05 | Max 0.025 | Max 0.025 | Max 0.2 | Max 0.4 | 26.5-27.8 | Max 0.6 | 6.0-7.0 | Bal. | 1.8-2.2 |
Physical Properties
Density: 7.1 g/cm3
Max Working Temperature: 1400°C
Melting Point: 1520 °C
Specific Resistance (at 20°C) (µΩ-m): 1.53±0.07
Linear Expansion Coeff. (T=20 – 1000°C) x10-6 : 16.0
Mechanical Properties
Tensile: 687-784 MPa
Elongation: Min 10%
Forms
Wire, Rod, Strip/Foil, Stranded Wire, Heating helix coil are available