PTC Alloy wire has medium resistivity and high positive temperature coefficient of resistance.It is widely used in various heaters.It can automatically control temperature and adjust power by keeping constant current and limiting current.
Chemical composition
| NAME |
CODE |
Main Composition(%) |
| Fe |
S |
Ni |
C |
P |
Standard |
| Temperature Sensitive Resistance alloy wire |
PTC |
Bal. |
≤0.01 |
77-82 |
≤0.05 |
≤0.01 |
Q/320421PTC4500-2008 |
Note:we also offer special alloy for special needs under the contract
Specifications and tolerances
| Specification(Ф,mm) |
0.05 |
0.10 |
0.15 |
0.16 |
0.17 |
0.18 |
0.19 |
0.20 |
0.21 |
0.22 |
0.23 |
0.24 |
0.25 |
| Tolerance |
±0.003 |
±0.005 |
±0.008 |
Resistivity (20ºC) (μΩ.m)
| CODE |
P-4500 |
P-4000 |
P-3800 |
P-3500 |
P-3000 |
P-2500 |
| Resisitivity(20ºC) |
0.19 |
0.25 |
0.27 |
0.36 |
0.40 |
0.43 |
The tensile strength of soft alloy wire shall be not less than 390MPa.
We can provide hard alloy wire,and the elongation is optional.
Elongation(%)
| Specification(Ф,mm) |
≤0.05 |
>0.05-0.1 |
>0.1-0.15 |
>0.15-0.25 |
| Alloy wire (soft) elongation |
10% |
12% |
16% |
20% |
DELIVERY
COMPANY
We produce many kinds of alloy wires
1:Copper-based alloy wire
2:Precision resistance wire
3:Pure nickel wire
4:Stranded wire
5:Thermocouple wire
6:Thermocouple compensating&Extension wire
Audited Supplier 
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