Alkrothal 720 strip used for Locomotive
1.Description
FeCrAl electric heating strip Alkrothal 720 with the characteristics of high resistance, low coefficient of electric resistance, high operating temperature, good corrosion resistance under high temperature.
Chemical Content(%)
C |
P |
S |
Mn |
Si |
Cr |
Ni |
Al |
Fe |
Other |
Max0.12 |
Max 0.025 |
Max 0.025 |
Max 0.70 |
Max 1.0 |
12.0~15.0 |
Max 0.60 |
4.0~6.0 |
Bal. |
- |
Mechanical Properties
Max Continuous Service Temp |
950ºC |
Resisivity at 20ºC |
1.25±0.08 ohm mm2/m |
Density |
7.4 g/cm3 |
Thermal Conductivity |
52.7 KJ/m·h·ºC |
Coefficient of Thermal Expansion |
15.4×10-6/ºC |
Melting Point |
1450ºC |
Tensile Strength |
588~735 Mpa |
Elongation |
Min 12% |
Section Variation Shrink Rate |
65~75% |
Repeatedly Bend Frequency |
Min 5 times |
Continuous Service Time |
- |
Hardness |
200-260HB |
Micrographic Structure |
Ferrite |
Magnetic Property |
Magnetic |
Temperature Factor of Electrical Resistivity
20ºC |
100ºC |
200ºC |
300ºC |
400ºC |
500ºC |
600ºC |
700ºC |
800ºC |
900ºC |
1000ºC |
1 |
1.005 |
1.014 |
1.028 |
1.044 |
1.064 |
1.090 |
1.120 |
1.132 |
1.142 |
1.150 |
2.Specification
1).Locomotive resistance strip:
Thickness:0.6mm-1.5mm
Width:60mm-90mm
2).Electric ceramic cooktop resistance strip:
Thickness:0.04mm-1.0mm
Width:5mm-12mm
Thickness&Width:(0.04mm-1.0mm)×12mm(above)
3).Low resistance ribbon:
Thickness&Width:(0.2mm-1.5mm)*5mm
4).Industrial furnace strip:
Thickness:1.5mm-3.0mm
Width:10mm-30mm
5)Wire: Diameter:0.05mm-10.0mm
3.Usage
FeCrAl electric heating strip Alkrothal 720 is mainly used in electric locomotive, diesel locomotive, metro vehicle and high speed moving car etc brake system brake resistor,electric ceramic cooktop,industrial furnace.
4.Features
FeCrAl electric heating strip Alkrothal 720 has Stable performance;Anti-oxidation;Corrosion resistance;High temperature stability;Excellent coil-forming ability;Uniform and beautiful surface condition without spots.