K Thermocouple Wire Nickel Alloy extension wire bright surface less
than 1.2mm
OHMALLOY have 20 years in producing the thermocouple alloy wire. In
order to ensure the quality of ourthermocouple wire, we have the product undergo smelting in a vacuum furnace, argon &
hydrogen annealing and continuous wire drawing, among other
processes.
For the diameter large than 1.2mm, we usually provide the Oxidized
status wire. And for the diameter less than 1.2mm, we can offer
bright wire packed on spool such as DIN80, 125, 160, 200.
Before sending out, we test each batch of thermocouple bare wire
and will issue the report for each spool or coil of wire.
OHMALLOY’s type K wire have long time stability at high temperature
such as 1000 Degree C and the quality was accepted by many customer
who is in area space industry, nuclear power industry.
Also OHMALLOY can supply the thermocouple alloy wire in cheap cost
for making extension cable. OHMALLOY have a lot of advantage in
reduing the cost while ensuring the quality of the extenison alloy
wire as we had large quantity order for that.
Thermocouple type and alloy material:
| Name and code of alloy wires | Diameter of wires (mm) | Maximum temperature ℃ |
| Positive | Negative |
| Name | Code | Name | Code | Long-time | Short-time |
| NiCr10 (Chromel) | KP | NiSi3 /(Alumel) (China standard) | KN | Φ0.3 | 700 | 800 |
| Φ0.5 | 800 | 900 |
| Φ0.8Φ1.0 | 900 | 1000 |
NiAl/(Alumel) (IEC standard) | KN |
| Φ1.2Φ1.6 | 1000 | 1100 |
| Φ2.0Φ2.5 | 1100 | 1200 |
| NiCr14.2Si | NP | NiSi4 | NN | Φ3.2 | 1200 | 1300 |
| NiCr10 (Chromel) | EP | CuNi45 (Constantan) | EN | Φ0.3Φ0.5 | 350 | 450 |
| Φ0.8Φ1.0Φ1.2 | 450 | 550 |
| Φ1.6Φ2.0 | 550 | 650 |
| Φ2.5 | 650 | 750 |
| Φ3.2 | 750 | 900 |
| Fe | JP | CuNi45 (Constantan) | JN | Φ0.3Φ0.5 | 300 | 400 |
| Φ0.8Φ1.0Φ1.2 | 400 | 500 |
| Φ1.6Φ2.0 | 500 | 600 |
| Φ2.5Φ3.2 | 600 | 750 |
| Cu | TP | CuNi45 (Constantan) | TN | Φ0.2Φ0.3 | 150 | 200 |
| Φ0.5Φ0.8 | 200 | 250 |
| Φ1.0Φ1.2 | 250 | 300 |
| Φ1.6Φ2.0 | 300 | 350 |
Thermocouple wire electromotive force (EMF) Tolerance:
| Thermocouple Type | Grade | Temperature range ℃ | Electromotive force(EMF) Tolerance |
| IEC (EN)60584 | ASTM E230 |
| Type K & Type N | Ⅰ | -40～1100 | ±1.5℃ or ±0.4%t | ±1.1℃ or ±0.4% |
| Ⅱ | -40～1300 | ±2.5℃ or ±0.75%t | ±2.2℃ or ±0.75% |
| Type E | Ⅰ | -40～1100 | ±1.5℃ or ±0.4%t | ±1.0℃ or ±0.4% |
| Ⅱ | -40～1300 | ±2.5℃ or ±0.75%t | ±1.7℃ or ±0.5% |
| Type J | Ⅰ | -40～750 | ±1.5℃ or ±0.4%t | ±1.1℃ or ±0.4% |
| Ⅱ | -40～750 | ±2.5℃ or ±0.75%t | ±2.2℃ or ±0.75% |
| Type T | Ⅰ | -40～350 | ±0.5℃ or ±0.4%t | ±0.5℃ or ±0.4% |
| Ⅱ | -40～350 | ±1.0℃ or ±0.75%t | ±1.0℃ or ±0.75% |
Stanrdard bare thermocouple wire electromotive force (EMF) values:
Temperature
℃ | Type K
ITS 90
DIN EN
60584 | Type N
ITS 90
DIN EN
60584 | Type E
ITS 90
DIN EN
60584 | Type J
ITS 90
DIN EN
60584 | Type T
ITS 90
DIN EN
60584 | Type S
ITS 90
DIN EN
60584 | Type R
ITS 90
DIN EN
60584 | Type B
ITS 90
DIN EN
60584 | Type U
IPTS 68
DIN
43710 | Type L
IPTS 68
DIN
43710 | Type L
GOST
492 |
| 0 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| 100 | 4,096 | 2,774 | 6,319 | 5,269 | 4,279 | 646 | 647 | 33 | 4,250 | 5,370 | 6,950 |
| 200 | 8,138 | 5,913 | 13,421 | 10,779 | 9,288 | 1,441 | 1,469 | 178 | 9,200 | 10,950 | 14,660 |
| 300 | 12,209 | 9,341 | 21,036 | 16,327 | 14,862 | 2,323 | 2,401 | 431 | 14,900 | 16,590 | 22,990 |
| 400 | 16,397 | 12,974 | 28,946 | 21,848 | 20,872 | | | | | | |
| 500 | 20,644 | 16,748 | 37,005 | 27,393 | | | | | | | |
| 600 | 24,905 | 20,613 | 45,093 | 33,102 | | | | | | | |
| 700 | 29,129 | 24,527 | 53,112 | 39,132 | | | | | | | |
| 800 | 33,275 | 28,455 | 61,017 | 45,494 | | | | | | | |
| 900 | 37,326 | 32,371 | 68,787 | | | | | | | | |
| 1000 | 41,276 | 36,256 | 76,373 | | | | | | | | |
| 1100 | 45,119 | 49,987 | | | | | | | | | |
| 1200 | 48,838 | 43,846 | | | | | | | | | |
| 1300 | 52,410 | 47,513 | | | | | | | | | |
