OhmAlloy142A
(Common Name:0Cr21Al6)
OhmAlloy142A is a iron-chromium-aluminium alloy (FeCrAl alloy) characterized by high resistance, low coefficient of electric resistance, high operating temperature, good corrosion resistance under high temperature.It is suitable for use at temperatures up to 1250°C.
Like nichrome, fecral has a excellent resistance to oxidation. At a high temperature environment, thermodynamically stable aluminum oxide will be formed on the surface of fecral alloy. The diffusion rate D at 1200 C is 10-16cm2/sec.
By comparing with nichrome alloys, fecral has a higher resistance and maximum operating temperature which is up to 1400 C. Fecral also has a cheap raw material and lower density. It will save budget. In addition, fecral has a higher surface load due to the higher maximum temperature and longer life. It also has a better resistance to sulphur in hot state.
Typical applications for OhmAlloy142A are used in electric ceramic cooktop,industrial furnace,heaters and catalytic purifier.
Normal composition%
| C |
P |
S |
Mn |
Si |
Cr |
Ni |
Al |
Fe |
Other |
| Max |
| 0.06 |
0.025 |
0.025 |
0.70 |
Max 1.0 |
19.0~22.0 |
Max 0.60 |
5.0~7.0 |
Bal. |
- |
Typical Mechanical properties(1.0mm)
| Yield strength |
Tensile Strength |
Elongation |
| Mpa |
Mpa |
% |
| 520 |
720 |
20 |
Typical Physical properties
| Density (g/cm3) |
7.16 |
| Electrical resistivity at 20ºC(Ωmm2/m) |
1.42 |
| Conductivity coefficient at 20ºC (WmK) |
13 |
| Coefficient of thermal expansion |
| Temperature |
Coefficient of Thermal Expansion x10-6/ºC |
| 20 ºC- 1000ºC |
14.7 |
| Specific heat capacity |
| Temperature |
20ºC |
| J/gK |
13 |
| Melting point (ºC) |
1500 |
| Max continuous operating temperature in air (ºC) |
1250 |
| Magnetic properties |
non-magnetic |
Temperature Factor of Electrical Resistivity
| 20ºC |
100ºC |
200ºC |
300ºC |
400ºC |
500ºC |
600ºC |
800ºC |
900ºC |
1000ºC |
1100ºC |
1200ºC |
1300ºC |
| 1 |
1.000 |
1.002 |
1.006 |
1.011 |
1.020 |
1.037 |
1.046 |
1.049 |
1.052 |
1.055 |
1.058 |
- |
Style of supply
| Alloys Name |
Type |
Dimension |
| OhmAlloy142AW |
Wire |
D=0.03mm~8mm |
| OhmAlloy142AR |
Ribbon |
W=0.4~40 |
T=0.03~2.9mm |
| OhmAlloy142AS |
Strip |
W=8~250mm |
T=0.1~3.0 |
| OhmAlloy142AF |
Foil |
W=6~120mm |
T=0.003~0.1 |
| OhmAlloy142AB |
Bar |
Dia=8~100mm |
L=50~1000 |
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