Cr23AI5Ti
Fields of application:
Used in the high temperatures electric furnaces, firing furnaces and fire drying furnaces, different electric thermal action apparatus and for producing resistive elements.
Technical information:
|
Chemical Compositions, % |
|||||||||||
|
C |
Cr |
Al |
Si |
Mn |
Ni |
S |
P |
Fe |
Ti |
Ca |
Ce |
|
≤0.05 |
21.5-23.5 |
4.6-5.3 |
≤0.6 |
≤0.3 |
≤0.6 |
≤0.015 |
≤0.020 |
основа |
0.2-1.0 |
0.1 |
0.1 |
|
Typical Mechanical and special properties |
|
|
Tensile Strength, MPa |
≤760 |
|
Elongation, % |
≥12 |
|
Density, g/cm3 |
7.21 |
|
Curie point |
-600°C |
|
Fusion temperature |
1500°C |
|
Electrical Resistivity, μΩ/m at 20°C |
1.39 |
|
Magnetic properties |
magnetic |
Advantages:
- Higher temperature of exploitation - till 1400°C, against 1200°C for Cr20Ni80;
- Higher fusion temperature - 1500°C, against 1400°C for Cr20Ni80;
- Higher (1.5- 2 times) term of employment at equal temperatures in comparison with nichrome;
- Less density - 7.21 g/cm3 against 8.4 g/cm3 for Cr20Ni80, that let economize about 16% on the weight;
- The best corrosion resistance in the air, vacuum, argon, sulfur content and carbon medium, water steam.
- Higher electrical resistivity -1.39 Om.mm2/m against 1.12 for Cr20Ni80. Disadvantages:
- For the avoidance of micro cracks at the winding of the heaters technical process must be taken at temperature for the wire up to 3.0mm - 300°C, for the wire 3.0-10.0 mm - 400°C by diameter.
- In the presence of vibration can be destroyed.