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Type K Thermocouple Bare Wire KP KN 3.2mm Diameter Heavy Duty Grade Durable

China Type K Thermocouple Bare Wire KP KN 3.2mm Diameter Heavy Duty Grade Durable

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Type K Thermocouple Bare Wire KP KN 3.2mm Diameter Heavy Duty Grade Durable

MOQ： 10KG
Price： Negotiable
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Payment Terms	L/C,T/T,Western Union
Supply Ability	500 tons per month
Delivery Time	5-21 days
Packaging Details	Carton/Wooden case
Alloy Grade	Type K
Diameter	3.2mm (±0.02mm)
Form	Coil
Accuracy Class	IEC Class 1
Operating Temperature	-200°C ~ 1260°C (continuous)
Tensile Strength	≥700 MPa (KP/KN)
Elongation	≥20%
Surface Finish	Oxidized (color can be customized)
Brand Name	Huona
Model Number	Type K
Certification	ISO9001
Place of Origin	Shanghai

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Product Details
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Product Specification


Payment Terms	L/C,T/T,Western Union	Supply Ability	500 tons per month
Delivery Time	5-21 days	Packaging Details	Carton/Wooden case
Alloy Grade	Type K	Diameter	3.2mm (±0.02mm)
Form	Coil	Accuracy Class	IEC Class 1
Operating Temperature	-200°C ~ 1260°C (continuous)	Tensile Strength	≥700 MPa (KP/KN)
Elongation	≥20%	Surface Finish	Oxidized (color can be customized)
Brand Name	Huona	Model Number	Type K
Certification	ISO9001	Place of Origin	Shanghai
High Light	Type K thermocouple bare wire ，KP KN thermocouple heavy duty ，3.2mm industrial thermocouple wire

Type K Thermocouple Bare Wire (KP/KN) – 3.2mm Diameter Heavy-Duty Grade

Product Overview

This heavy-gauge Type K thermocouple bare wire from Huona is a robust, industrial-grade thermoelectric wire pair composed of KP (Chromel, positive leg) and KN (Alumel, negative leg), specifically engineered for long-term, high-temperature industrial applications. Manufactured via precision vacuum melting, heavy-gauge drawing, and stress-relief annealing, this thick wire delivers exceptional mechanical strength, resistance to thermal fatigue, and stable thermoelectric performance, making it ideal for furnace monitoring, kiln controls, and power plant processes.

Core Specifications

Product Name: Type K Thermocouple Bare Wire (KP/KN Pair, Heavy-Duty)
Alloy Composition:
- KP (Positive Leg): Chromel (Ni: ~90%, Cr: ~10%)
- KN (Negative Leg): Alumel (Ni: ~95%, Al: ~2%, Mn: ~2%, Si: ~1%)
Diameter: 3.2mm (customizable: 2.0–6.0mm)
Tolerance: ±0.02mm
Form: Coil (standard length: 25m/leg; custom lengths available)
Thermoelectric Performance:
- Accuracy Class: IEC Class 1 (±1.5°C or ±0.4% of reading, whichever is greater)
- Thermoelectric Power: ~40.5 µV/°C at 100°C
Operating Temperature Range: -200°C ~ 1260°C (continuous use; long-term service life enhanced at 1000–1200°C)
Standards Compliance: IEC 60584-1, ASTM E230, GB/T 4989, RoHS 2.0
Manufacturer: Huona (Shanghai) New Material Co., Ltd.

Key Differentiating Advantages

1. Extended Service Life in High-Temperature Environments

The heavy 3.2mm diameter significantly slows the rate of oxidation and “green rot” degradation at temperatures above 1000°C, doubling the service life compared to thinner (≤1.0mm) Type K wires. This reduces maintenance and replacement costs in continuous-process industrial furnaces.

2. Superior Mechanical Strength & Thermal Fatigue Resistance

With a tensile strength ≥700 MPa and robust cross-sectional area, this wire resists sagging, deformation, and breakage in vertical furnace installations and under repeated thermal cycling. It eliminates the risk of wire fatigue common with fine-gauge wires in high-vibration environments.

3. Reduced Signal Drift & Stable Long-Term Readings

The larger cross-sectional volume of the heavy-gauge wire minimizes thermoelectric drift caused by alloy phase changes and contamination, ensuring consistent, accurate readings even after thousands of hours of continuous high-temperature use.

4. Enhanced Weldability & Probe Assembly Compatibility

The thick wire diameter provides ample material for robust junction welding, simplifying the construction of heavy-duty, high-temperature thermocouple probes. It is also compatible with standard ceramic protection tubes and terminal connections for industrial installations.

5. Low Maintenance for Continuous Process Monitoring

Designed for minimal calibration and replacement needs, this heavy-duty wire is ideal for “fit-and-forget” temperature monitoring in power plants, steel mills, and glass manufacturing facilities where process uptime is critical.

Technical Specifications Table

Attribute	Value (Typical)
Alloy Grade	KP (Chromel) / KN (Alumel)
Diameter	3.2mm (±0.02mm)
Form	Coil
Accuracy Class	IEC Class 1
Operating Temperature	-200°C ~ 1260°C (continuous)
Tensile Strength	≥700 MPa (KP/KN)
Elongation	≥20%
Surface Finish	Oxidized dark finish (standard for high-temperature use)
Packaging	Anti-oxidation coil packaging with moisture-proof wrapping

Typical Applications

Industrial Furnaces & Kilns: Long-term temperature monitoring in steel reheat furnaces, ceramic kilns, and glass melting processes.
Power Generation: Boiler and steam turbine temperature monitoring in coal-fired and gas-fired power plants.
Metallurgical Processing: Temperature control in metal heat treatment, casting, and forging operations.
Petrochemical Refining: High-temperature monitoring in process heaters, reformers, and catalytic cracking units.
Heavy Machinery: Engine exhaust and industrial boiler temperature sensing in power generation and manufacturing equipment.

Company Details

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Business Type:

Manufacturer,Exporter 
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Year Established:

2008 
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Total Annual:

8000000-100000000
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Employee Number:

100~120 
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Ecer Certification：

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Huona (Shanghai) New Material Co., Ltd. Was established in 2008, currently have three divisions: Magnesium Division, Thermal Spray Division and Functional Material Division.Magnesium Division produces magnesium metal products. Various models of high-quality magnesium alloy plate, magnesium rods, hig... Huona (Shanghai) New Material Co., Ltd. Was established in 2008, currently have three divisions: Magnesium Division, Thermal Spray Division and Functional Material Division.Magnesium Division produces magnesium metal products. Various models of high-quality magnesium alloy plate, magnesium rods, hig...

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