High-Purity Graphite Rods: Conductive and Corrosion-Resistant | Designed for Laboratory and Industrial Heating and Stirring | Custom Sizes Available

▍Product Description

Our graphite rods are specifically designed for demanding industrial environments. We maintain strict quality control throughout the entire process—from raw material selection to final product inspection—to ensure that every rod meets standards for high purity, low porosity, and high strength. Whether used for uniform heating in precision experiments or for stable electrical conductivity in large-scale equipment, they deliver reliable performance. The surface of our products is finely polished, ensuring high thermal conductivity and resistance to breakage, with a service life far exceeding that of ordinary carbon rods. We offer a wide range of standard sizes in stock and support custom orders. With delivery as fast as 7 days, we help your projects move forward efficiently.

Single Rod Diagonal

Three Rods Vertical

Multiple Rods Scattered

▍Key Product Benefits: Why Choose Ningheda Graphite Rods?

1. True ultra-high-temperature resistance: It can operate stably at 2,500°C in an inert gas or vacuum environment without softening or deforming. In contrast, the strength of ordinary steel drops significantly at 600°C.

   
   

2. Exceptional electrical and thermal conductivity: Its unique layered crystal structure allows electrons to move freely, resulting in a resistivity as low as 10-13μΩ·m—making it more conductive than many alloys. Extremely fast thermal response, significantly shortening heating cycle times and reducing energy consumption.

   
   

3. High density and high strength: Utilizing isostatic pressing technology, the material achieves a maximum density of over 1.85 g/cm³. It features a non-powdering surface, high mechanical strength, and erosion resistance, making it suitable for dynamic applications such as stirring molten metals.

   
   

4. Flexible Custom Processing Capabilities: We offer end-to-end services from raw materials to finished products. Based on your drawings, we can perform precision CNC machining—including turning, milling, drilling, tapping, and slotting—to deliver custom-shaped parts that meet your installation requirements.

▍Product Features

Material Grade Classification:

Appearance and Dimensions

Shape: Cylindrical (customizable to conical, stepped, or threaded ends)

Diameter Range: Φ2mm – Φ200mm

Length Range: 50mm – 1500mm (Extra-long lengths can be joined)

Surface Finish: Turned/Honed/Polished

Straightness: ≤0.1mm/100mm (Precision grade: ≤0.05mm/100mm)

Cross Stacked

Fan Arrangement

Parallel Short Rods

▍Product Applications and Their Benefits

• Laboratory Analytical Instruments

Applications: Graphite furnace atomic absorption spectrometers, sample heating blocks, stirring rods

Key Benefits: Uniform heating, no interference from element leaching, easy to clean

Related Fields: Environmental monitoring, food safety testing, materials analysis

• Chemical Industry Mechanical Seals

Applications: Sealing rings/bearing sleeves for centrifugal pumps, reactors, and hydraulic turbines

Key Advantages: Self-lubricating and maintenance-free, resistant to acid and alkali corrosion, wide operating temperature range from -200°C to 2000°C

Replacement Value: Replaces PTFE/metal seals, extending service life by 2–3 times

• Electronics and Semiconductor Manufacturing

Applications: Single-crystal silicon pulling heaters, CVD process graphite bases, IC packaging molds

Key Advantages: High-purity grade with ash content ≤0.05%, no metal contamination, low thermal expansion coefficient

Key Specifications: Purity ≥99.9%, surface roughness Ra ≤15μm

Lab Instrument

Chemical Pump Seal

Semiconductor Equipment

▍FAQ

Q1: How do I choose the appropriate material grade?

A1: For general heating or mechanical applications, select the Standard Grade; for continuous high-temperature and heavy-duty applications, select the High-Density Grade; for semiconductor, electronics, or pharmaceutical applications, select the High-Purity Grade; for oxidizing environments or applications requiring an exceptionally long service life, select the Impregnated Grade. If you are unsure, please provide your operating conditions (temperature, medium, and stress conditions), and our engineers will assist you with product selection free of charge.

Q2: What is the maximum temperature these products can withstand? Are they suitable for high-temperature experiments?

A2: High-purity graphite substrates offer excellent high-temperature resistance and are suitable for various routine high-temperature heating experiments in laboratories. They will not deform, crack, or soften in high-temperature environments and maintain stable performance, making them the preferred consumables for high-temperature experimental operations.

Q3: Do you offer custom graphite rods in non-standard sizes?

A3: Yes. We offer comprehensive customization services. Based on your experimental equipment and operational requirements, we can produce non-standard graphite mini-rods in various diameters and lengths to meet all kinds of specialized and personalized application scenarios.

Q4: What should I do if a graphite rod breaks during use?

A4: First, identify the cause—was the rod overloaded due to a series circuit? Did rapid voltage increases cause thermal shock? Was the rod used beyond its temperature limit? We provide technical guidance on usage. If the breakage is confirmed to be caused by a material defect, we will replace the product free of charge within the warranty period.

Q5: Can you provide export customs clearance documents?

A5: Yes. We hold our own import and export rights and can provide a full set of customs clearance documents, including a Certificate of Origin (CO), MSDS, packing list, and commercial invoice. Please inform us in advance of any special certification requirements for the destination country.