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Type K Chromel / Alumel Bare Thermocouple Wire For Cooling - Freezers

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China Ohmalloy Material Co.,Ltd certification
China Ohmalloy Material Co.,Ltd certification
I search for Nichrome plate long time, and successfully bought it from Ohmalloy material. OHMALLOY provide real good service in alloy service and can always help me in finding the correct resistance alloy.

—— Mike Harness

OHMALLOY can provie me only 1kg Kovar alloy wire 1.0mm with short time, that is really amazing. Thanks

—— Janey

Really professional in thermocouple wire and cable, what i want just can get from OHMALLOY

—— Chris

Enamelled Constantan 0.08mm, i never expect to get only 2kg of it. But OHMALLOY supply it to me with good quality. God Jesus! Such a reliable supplier from china

—— Aaron

Type K Chromel / Alumel Bare Thermocouple Wire For Cooling - Freezers

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Large Image :  Type K Chromel / Alumel Bare Thermocouple Wire For Cooling - Freezers Get Best Price

Product Details:
Place of Origin: China(Shanghai)
Brand Name: OHMALLOY
Certification: ISO9001,RoHS
Model Number: 9010R10
Payment & Shipping Terms:
Minimum Order Quantity: 10KG
Price: 20-50USD/KG
Packaging Details: 20kg/coil, or DIN 160 or DIN 250
Delivery Time: 7-10 days
Payment Terms: L/C, T/T, , MoneyGram
Supply Ability: 500000kg per month
Detailed Product Description
Dia: 6-12mm Length: 500-1000mm
Shape: Wire/Rod/Bar/Strip Application: Heating
High Light:

thermocouple bare wire


thermocouple extension wire

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


Type K Chromel / Alumel Bare Thermocouple Wire For Cooling - Freezers 0

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)



(IEC standard)

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 -40~1100 ±1.5℃ or ±0.4%t ±1.1℃ or ±0.4%
-40~1300 ±2.5℃ or ±0.75%t ±2.2℃ or ±0.75%
Type E -40~1100 ±1.5℃ or ±0.4%t ±1.0℃ or ±0.4%
-40~1300 ±2.5℃ or ±0.75%t ±1.7℃ or ±0.5%
Type J -40~750 ±1.5℃ or ±0.4%t ±1.1℃ or ±0.4%
-40~750 ±2.5℃ or ±0.75%t ±2.2℃ or ±0.75%
Type T -40~350 ±0.5℃ or ±0.4%t ±0.5℃ or ±0.4%
-40~350 ±1.0℃ or ±0.75%t ±1.0℃ or ±0.75%

Contact Details
Ohmalloy Material Co.,Ltd

Contact Person: Mr. Qiu

Tel: +8613795230939

Send your inquiry directly to us