Fecral resistohm145 A1 D A1 Tk1 APM High-Temperature Heating Wire
TK APM Tubes are an advanced powder metallurgical, dispersion strengthened, ferritic iron-chromium-aluminium alloy (FeCrAl alloy) for use at tube temperatures up to 1250°C (2280°F).
TK APM tubes have good form stability at high temperature. TK APM forms an excellent, non-scaling surface oxide, which gives good protection in most furnace environments, i.e. oxidizing, sulphurous and carburizing, as well as against deposits of carbon, ash, etc. The combination of excellent oxidation properties and form stability makes the alloy unique.
Typical applications for TK APM are as radiant tubes in electrically or gas fired furnaces such as continuous galvanizing furnaces, seal quench furnaces, holding furnaces and dosing furnaces in the aluminium, zinc, lead industries, thermocouple protection tubes, furnace muffles for sintering applications.
Composition(Wt%)
|
|
C |
Si |
Mn |
Cr |
Al |
Fe |
|
Min |
- |
- |
- |
20 |
5.5 |
Bal. |
|
Max |
0.04 |
0.5 |
0.4 |
22 |
6.0 |
Bal. |
Mechanical Properties
|
Tensile Strength at Room Temperature |
650 - 750 MPa |
|
Elongation Rate |
15 -25% |
|
Hardness |
220 - 260 HV |
|
Tensile Strength at 1000℃ |
22 - 27 MPa |
|
High Temperature Durability at 1000℃ and 6MPa |
≥100 h |
Physical Properties
|
Density |
7.10 g/cm3 |
||
|
Resistivity |
1.45×10-6 Ω.m |
||
|
Melting Point |
1500 ℃ |
||
|
Maximum Continuous Working Temperature |
1400 ℃ |
||
|
Resistance Temperature Coefficient(Ct) |
800℃ |
1000℃ |
1400℃ |
|
1.03 |
1.04 |
1.05 |
|
|
Average Linear Expansion Coefficient |
20-800℃ |
20-1000℃ |
20-1400℃ |
|
14 |
15 |
16 |
|
Fast life
|
|
1300℃ |
1350℃ |
|
Average Fast Life (Hours) |
110 |
90 |
|
Sagging Rate After Rupture |
8 |
11 |
Specifications
Wire diameter range φ0.1-10mm
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