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[China]
Trade Verify
Address: Room 311, No.1211, Mudanjiang Road, Baoshan district, Shanghai
Contact name:Qiu
Ohmalloy Material Co.,Ltd |
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Verified Suppliers
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TYPE K (CHROMEL vs ALUMEL ) is used in oxidizing, inert or dry reducing atmospheres. Exposure to vacuum limited to short time periods. Must be protected from sulfurous and marginally oxidizing atmospheres. Reliable and accurate at high temperatures.It has high EMF against Platinum 67,excellent temperature accuracy,senstivity and stability,with a low cost.
Chemical Content(%)
| Item No | Ni | Cr | Al | Mn | Si |
| Chromel | 90 | 10 | - | - | - |
| Alumel | 95 | - | 2 | 2 | 1 |
EMF Value Range at Different Temperature
| Material | EMF value Vs Pt(μV) | |||||
| 100℃ | 200℃ | 300℃ | 400℃ | 500℃ | 600℃ | |
| KP(Chromel) | 2816~2896 | 5938~6018 | 9298~9378 | 12729~12821 | 16156~16266 | 19532~19676 |
| KN(Alumel) | 1218~1262 | 2140~2180 | 2849~2893 | 3600~3644 | 4403~4463 | 5271~5331 |
| EMF value Vs Pt(μV) | ||||
| 700℃ | 800℃ | 900℃ | 1000℃ | 1100℃ |
| 22845~22999 | 26064~26246 | 29223~29411 | 32313~32525 | 35336~35548 |
| 6167~6247 | 7080~7160 | 7959~8059 | 8807~8907 | 9617~9737 |
Style of supply
| Item No | Size |
| Chromel Rod | Diameter 6-12mm; Length 500-1000mm |
| Alumel Rod | Diameter 6-12mm; Length 500-1000mm |
OHMALLOY have 20 years in producing the thermocouple alloy strip. The thickness can be from 0.1mm to 2mm while the width can be from 5mm to 210mm.
Usually, we make the normal size such as 1mmX50mm, 0.75mmX50mm, 0.75mmX100mm, they are mainly used for all kinds of thermocouple plug pin. And we also can make special size based on client’s unique requirement.
For the type KN, We have two types. One is china standard NiSi3 ( Ni 97%, Si 3%), the other one is NiAl ( IEC standard).
The available thermocouple type and alloy material:
| Name and code of alloy wires | |||
| Positive | Negative | ||
| Name | Code | Name | Code |
| NiCr10 (Chromel) | KP | NiSi3 /(Alumel) (China standard) | KN |
NiAl/(Alumel) (IEC standard) | KN | ||
| NiCr14.2Si | NP | NiSi4 | NN |
| NiCr10 (Chromel) | EP | CuNi45 (Constantan) | EN |
| Fe | JP | CuNi45 (Constantan) | JN |
| Cu | TP | CuNi45 (Constantan) | TN |
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% | |
