Ohmalloy Material Co.,Ltd
| Payment Terms | L/C, T/T, , MoneyGram,Paypal |
| Supply Ability | 30 tons per month |
| Delivery Time | 8-15 working days after payment confirmed |
| Packaging Details | paper wrap+plywood case |
| Name | Thermocouple k-type KP KN chromel alumel alloy |
| Type | Type K pin （Chromel Alumel） |
| State | Soft, annealed/ Hard/ 1/2 Hard / 1/4 Hard |
| Surface | Oxidize/ Pickled/ Bright |
| Accuracy | Class 1(Class A) |
| Package | plywood case |
| Brand Name | OHMALLOY/OEM |
| Model Number | type K |
| Certification | CCC |
| Place of Origin | China |
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Product Specification
| Payment Terms | L/C, T/T, , MoneyGram,Paypal | Supply Ability | 30 tons per month |
| Delivery Time | 8-15 working days after payment confirmed | Packaging Details | paper wrap+plywood case |
| Name | Thermocouple k-type KP KN chromel alumel alloy | Type | Type K pin （Chromel Alumel） |
| State | Soft, annealed/ Hard/ 1/2 Hard / 1/4 Hard | Surface | Oxidize/ Pickled/ Bright |
| Accuracy | Class 1(Class A) | Package | plywood case |
| Brand Name | OHMALLOY/OEM | Model Number | type K |
| Certification | CCC | Place of Origin | China |
| High Light | Pin Type K Thermocouple Connector ，Accuracy Type K Pin Thermocouple Connector | ||
Thermocouple k-type KP KN chromel alumel alloy
Leg Alloy Designation Chemical Composition Key Characteristics
Positive (KP) Chromel Equivalent Ni 89-91%, Cr 9-10%, Si/Mn ≤1% Non-magnetic, resistivity 0.71 μΩ·m
Negative (KN) Alumel Equivalent Ni 94-97%, Al 1.5-2.5%, Mn 1.5-2.5%, Si ≤1% Magnetic, resistivity 0.23 μΩ·m
Parameter Value Standard/Notes
Temp Range (Wire Grade) Short-term: -200°C to 1,300°C Max 1,260°C per IEC 60584-1
Long-term:0°C to 1,100°C Optimal stability range
Temp Range (Extension) 0°C to 200°C Limited accuracy beyond 200°C
EMF Output 41 µV/°C at 1,000°C Vs. Platinum 67 reference
Accuracy (Class 1) ±1.5°C or ±0.4% (>0°C) Whichever greater
±2.5°C (-200°C to 0°C) Cryogenic tolerance
Oxidation Resistance Superior to Type J/T/E below 1,000°C Cr2O3 protective layer
Recommended Atmospheres:
Prohibited Conditions:
Scenario Failure Mechanism Mitigation
Sulfur-containing gases Sulfidation → brittle fracture Avoid H2S/SO2 environments
Alternating redox cycles Calibration drift >5°C Use Type N in cyclic apps
Vacuum >1 hour (>800°C) Chromium vaporization Max 60-min exposure
H2/CO atmospheres Green Rot corrosion (815-1040°C) Ceramic protection tubes
Class Tolerance Formula Application Context
Class 1 ±1.5°C or ±0.004×|t| (°C) Aerospace, calibration labs
Class 2 ±2.5°C or ±0.0075×|t| (°C) Industrial process control
|t| = Absolute temp in °C; Special Error Grade (±0.4%) available for high-precision needs
Connection Best Practices:
Aging Prevention:
Physical Properties:
Property KP Value KN Value
Density (g/cm³) 8.5 8.6
Tensile Strength ≥490 MPa ≥390 MPa
Elongation ≥10% ≥15%
Thermocouples are used in processes to sense temperature and is connected to the pyrometers for indication and control. The thermocouple and pyrometer are electrically conducted by thermocouple extension cables / thermocouple compensating cables. The conductors used for these thermocouple cables are required to have similar thermo-electric (emf) properties as that of the thermocouple used for sensing the temperature.
Our plant mainly manufacture thermocouple wire, strip, and cable, and they are used in temperature measurement instruments. Our thermocouple products are all made abiding by GB and also IEC584-3 (International standard).
Thermocouple strip can be used to produce thermocouple connector's hollow pin, thermocouple spade, and thermocouple connector's contacts.
| Chemical Composition | |||||
| Conductor Name | Polarity | Code | Nominal Chemical Composition /% | ||
| Ni | Cr | Si | |||
| Ni-Cr | Positive | KP | 90 | 10 | -- |
| Ni- Si | Negative | KN | 97 | -- | 3 |
Application
• Heating – Gas burners for ovens
• Cooling – Freezers
• Engine protection – Temperatures and surface temperatures
• High temperature control – Iron casting
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter,Trading Company
Year Established:
2008
Total Annual:
4000000-6000000
Employee Number:
20~50
Ecer Certification：
Verified Supplier
Ohmalloy Material Co.,Ltd is a high-tech enterprise which specialized in making all kinds of alloy such as high resistance alloy, low-resistance copper nickel alloy, precision alloy, FeCrAl alloy and thermocouple Alloy. Ohmalloy Material Co.,Ltd have a full production line from melting, surface... Ohmalloy Material Co.,Ltd is a high-tech enterprise which specialized in making all kinds of alloy such as high resistance alloy, low-resistance copper nickel alloy, precision alloy, FeCrAl alloy and thermocouple Alloy. Ohmalloy Material Co.,Ltd have a full production line from melting, surface...
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