Temperature coefficient of resistance constantan, alumel, chromel, kopel
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Technical specifications
| Alloy |
Density (g / cm³,) |
Melting temperature |
Annealing temperature |
Electrical resistance (Ohm • mm² / m;) |
TKLR |
| Aljumel |
8.48 |
1440 ° C |
950 ° C
|
0.32 |
13.7 • 10−6 / ° C |
| Chromel, |
8.7 |
1400−1500 ° C |
800−900 ° C
|
0.68 |
12.8 • 10−6 / ° C |
| Kopel |
8.9 |
1290 ° C |
800−850 ° C
|
0.5 |
14 • 10−6 / ° C |
| Constantan |
8.9 |
1260 ° C |
950 ° C
|
0.4 |
14 • 10−6 1 / ° С |
Percent composition of alumel
| Fe |
Co |
Mn |
Ni + Co |
C |
Mn |
Al |
Si |
Impurities |
|---|
| ≤0.3 |
0.6 — 1.2 |
1.8 — 2.7 |
91.5 — 95.15 |
≤0.1 |
1.8 — 2.7 |
1.6 — 2.4 |
0.85 — 1.5
|
≤0, 7 |
The surface of the alumel wire is more matte, greyish, less shiny than the surface of the chrome
Percentage of chromel
| Ni + Co |
Fe |
C |
Co |
Si |
Mn |
Si |
Al |
Impurities |
|---|
| 87.4 — 90.4 |
≤ 0.3 |
≤ 0.2 |
9 — 10 |
≤ 0.4 |
≤ 0.3 |
≤ 0.4 |
0.6 — 1.2
|
≤1,4
|
The percentage composition of the MNMC 43−0.5
| C |
Fe |
Ni + Co |
Si |
Cu |
Mn |
Impurities |
|---|
| ≤ 0.1 |
≤ 0.15 |
42.5 — 44 |
≤ 0.1 |
54.4 — 57.4 |
0.1 — 1
|
≤0, 6 |
The percentage composition of the MNMC font is 40−0.5
| C |
Fe |
Ni + Co |
Si |
Cu |
Mn |
Impurities |
|---|
| ≤ 0.1 |
≤ 0.2 |
39.5−41 |
≤ 0.1 |
55.4 — 58.4 |
0.1 — 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, price
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