Iron
Fe
Bal.
Chromium
Cr
18.0~21.0%
Aluminium
Al
3.0~4.2%
Silicon
Si
≤1.0%
Nickel
Ni
≤0.60%
Manganese
Mn
≤0.70%
Carbon
C
≤0.12%
Sulphur
S
≤0.025%
Phosphorus
P
≤0.025%
0Cr21Al4 resistance alloy is composed of iron, chromium and aluminum with stable resistivity, good oxidation resistance, and the highest applicable temperature is up to 1100 degrees. The alloy is mainly used in household electric heating elements, metal smelting and industrial furnaces.
Mechanical performance (1.0mm)
| Yield Strength |
Tensile strength |
Elongation |
| Mpa |
Mpa |
% |
| ≥550 |
≥750 |
≥16 |
Physical properties
| Density (g/cm3) |
7.35 |
| Resistivity at 20℃(Ωmm2/m) |
1.23 |
| Thermal conductivity at 20℃ (WmK) |
13 |
| Melting point (℃) |
1500 |
| Maximum use temperature(℃) |
1100 |
| Magnetic |
Magnetic |
| Thermal expansion coefficient |
| Temperature |
Average linear expansion coefficient x10-6/℃ |
| 20 ℃- 1000℃ |
13.5 |
| Specific heat capacity |
| Temperature |
20℃ |
| J/gK |
0.49 |
Resistance temperature factor (correction factor)
| 20℃ |
100℃ |
200℃ |
300℃ |
400℃ |
500℃ |
600℃ |
700℃ |
800℃ |
900℃ |
1000℃ |
1100℃ |
1200℃ |
1300℃ |
| 1 |
1.005 |
1.014 |
1.028 |
1.044 |
1.064 |
1.09 |
1.12 |
1.132 |
1.142 |
1.15 |
- |
- |
- |
Supply form and specification
| Alloy name |
Form |
Specification |
| 0Cr21Al4 |
Wire |
D=0.03mm~8mm |
| 0Cr21Al4 |
FlatW |
W=0.4~40 |
T=0.03~2.9mm |
| 0Cr21Al4 |
Strip |
W=8~250mm |
TT=0.1~3.0 |
| 0Cr21Al4 |
Foil |
W=6~120mm |
T=0.003~0.1 |
| 0Cr21Al4 |
Bar |
D=8~100mm |
L=50~1000 |
