Standards for production of thermocouple wire
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Characteristic of thermocouple wire
The thermocouple consists of a pair of different conductors that are soldered together at one end and placed in a temperature measuring environment («hot contact»), and the free two ends are placed in a thermostat (the so-called «cold contact») .The thermocouple wire has the following qualities:
- — heat resistance;
- — low density;
- — high electrical resistivity;
- — minimum coefficient of temperature linear expansion;
- — Low coefficient of temperature electrical resistance;
- — high thermo-emf in the operating temperature range is the most important property.
Unique properties of thermocouple wire are due to its balanced composition and the absence of harmful impurities.
Percent composition
| Make | Fe | Co | Cu | Mn | Ni + Co | C | Al | Si | Impurities |
|---|---|---|---|---|---|---|---|---|---|
| Aljumel | ≤0.3 | 0.6 — 1.2 | 1.8 — 2.7 | 91.5 — 95.15 | ≤0.1 | 1.6 — 2.4 | 0.85 — 1.5 |
≤0, 7 | |
| Chromel | ≤0.3 | 9 — 10 | ≤0.3 | 87.4 — 90.4 | ≤0.2 | 0.6 — 1.2 | ≤0.4 | ≤1,4 |
Percentage of the fossil
| Brands | Fe | Cu | Mn | Ni + Co | C | Si | Impurities |
|---|---|---|---|---|---|---|---|
| MnMc 43−0.5 | ≤0.15 | 54.4 — 57.4 | 0.1 — 1 | 42.5 — 44 | ≤0.1 | ≤0.1 | ≤0,6 |
| MnMc 40−0.5 | ≤0.2 | 55.4 — 58.4 |
0.1 — 1 | 39.5−41 | ≤0.1 | ≤0.1 | ≤0,6 |
The percentage composition of constantan MNMc 40−1.5
| C | Fe | Ni + Co | Si | Cu | Mn | Impurities |
|---|---|---|---|---|---|---|
| ≤ 0.1 | ≤ 0.5 | 39 — 41 | ≤ 0.1 | 56.1 — 60 | 12 |
≤0, 9 |
Storage
In closed warehouses or under a canopy, where adequate protection against mechanical and other damages is provided.
Delivery today
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