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HHSIC Straight Silicon Carbide(SiC) Heating Elements( ED/Straight/ GD types) Manufactured from high-purity green silicon carbide (SiC) through recrystallization sintering at over 2200℃, straight silicon carbide heating elements feature a consistent diameter from the hot zone to the cold ends, offering simple structure, easy installation, and quick replacement. As non-metallic high-temperature heating elements, they can operate up to 1450℃ in oxidizing atmospheres, making them one of the most mature and widely used heating elements in industrial resistance furnaces, tunnel kilns, and heat treatment equipment.
Technical Parameter
OD: Outer Diameter (mm)
HZ: Hot Zone Length (mm)
CZ: Cold Zone Length (mm)
OL: Overall Length (mm)
Resistance: Ω
Specification
Parameter | Specification Range |
Diameter | Φ8mm-φ54mm |
Hot Zone Length | 100mm-2700mm |
Cold End Length | 60mm-800mm |
Overall Length | Customized per request |
Resistance | 0.3Ω-8.6Ω（tested at 1050℃±50℃） |
Max Operating Temp | 1450℃（oxdizing atmosphere)） |
Density | 3.0-3.2g/cm3 |
Max Operating Temp | 1450℃（oxidizing atmosphere） |
Density | 3.0-3.2g/cm3 |
Thermal Conductivity | 20kcal/m·h·℃ |
Coefficient of Linear Expansion | 5×10-6/℃ |
HHSIC GD Type SiC Heating Elements
Diameter(OD,mm) | Hot Zone(HZ,mm) | Cold Zone(CZ,mm) | Overall Length(OL,mm) | Resistance(Ω) |
8 | 100-300 | 60-200 | 240-700 | 2.1-8.6 |
12 | 100-400 | 100-35 | 300-110 | 0.8-5.8 |
14 | 100-500 | 150-350 | 400-1200 | 0.7-5.6 |
16 | 200-600 | 200-350 | 600-1300 | 0.7-4.4 |
18 | 200-800 | 200-400 | 600-1650 | 0.7-5.8 |
20 | 200-800 | 250-600 | 700-2000 | 0.6-6.0 |
25 | 200-1200 | 250-700 | 700-2600 | 0.4-5.0 |
30 | 300-2000 | 250-800 | 800-3600 | 0.4-4.0 |
35 | 400-2000 | 250-800 | 900-3600 | 0.5-3.6 |
40 | 500-2700 | 250-800 | 1000-4300 | 0.5-3.4 |
45 | 500-3000 | 250-750 | 1000-4500 | 0.3-3.0 |
50 | 600-2500 | 300-750 | 1200-4000 | 0.3-2.5 |
54 | 600-2500 | 300-780 | 1200-4000 | 0.3-3.0 |
Key Advantages of GD Type SiC Heating Elements
· Uniform diameter for easy installation
· Excellent temperature resistance
· Flexible resistance matching
· Oxidation and corrosion resistance
· Long service life, low degradation
· Rapid heating, high thermal efficiency
Applications
Industry | Typical Equipment |
Metallurgy | Heat treatment furnaces,sintering furnaces,forging furnaces |
Ceramics | Tunnel kilns,roller kilns,electric kilns |
Glass | Glass melting furnaces,annealing furnaces |
Electronics | Diffusion furnaces,sintering furnaces |
Chemical | Reactors,drying equipment |
Laboratory | Muffle furnaces,high-temperature testing furnaces |
Installation & Operation Guidelines
Installation Clearance | Furnace hole diameter should be1.4-1.6 times the element diameter for thermal expansion |
Element Spacing | Center-to-center spacing≥4×hot zone diameter |
Voltage Regulation | Recommended to use voltage regulator;initial voltage at half of normal value,gradually increased |
Resistance Matching | Elements with similar resistance(deviation≤10% ) should be connected in the same circuit |
Moisture Protection | Store in dry environment to prevent decomposition of aluminum layer at cold ends |
Customization Services
We support non-standard customization based on drawings or parameters to meet various special operating conditions:
· Custom shapes: U-shape, W-shape, etc., tailored to furnace chamber structure
· Precise resistance matching: Specified resistance values as required
· Special sizes: Diameter and length beyond standard ranges
· Technical consultation: Free selection advice and installation guidance
For quotation or technical support, please provide:
· Diameter / Hot zone length / Overall length / Resistance value
· Operating temperature and atmosphere
· Drawings or special requirements
Equipment & Inspection
Production Equipment
Inspection Equipment
Note: Our silicon carbide heating elements undergo three rigorous quality inspections before being approved for shipment.
Packing&Transport
HHSIC Frequently Asked Questions
1. What are your factory's strengths?
· Modern production lines – Automated equipment with strict process control
· ISO9001 certified – Quality management throughout every stage
· In-house R&D team – Continuous development of new materials and custom designs
2. How do you ensure product quality?
We implement rigorous quality control at every step:
· All incoming raw materials are inspected
· Sintering processes are monitored in real time
· Every element undergoes resistance testing, visual inspection, and dimensional verification
· Each batch is traceable with complete test records
3. Is there a minimum order quantity?
No. Most standard models have no MOQ – you can order just one piece. We encourage trial orders before moving to larger volumes.
4. What are your typical lead times?
· Standard products: 7-10 days
· Custom products: 15-30 days (depending on complexity)
Expedited processing is available for urgent requirements.
5. How do you handle shipping?
Shipping is arranged based on order size and customer location:
· Small quantities: Sent via DHL, FedEx, or UPS for fast delivery
· Large orders or complete furnaces: Shipped by sea or air freight, with the most cost-effective route confirmed in advance
6. Where do you export?
We ship to over 50 countries across Europe, the Americas, Southeast Asia, the Middle East, and Africa. Available trade terms include EXW, FOB, CIF, and DDP.
7. What is your warranty policy?
· Heating elements (consumables): If manufacturing defects (cracks, incorrect dimensions, abnormal resistance) are found within 30 days of receipt, contact us for replacement. Normal wear from use is not covered.
· Lifetime technical support is always available.
8. Do you provide technical support?
Yes. Our engineering team offers:
· Installation guidance and operation training
· Troubleshooting and maintenance recommendations
· Full technical documentation for OEM clients
9. Can I get samples?
Yes. Samples of selected models are available free of charge; you only pay the shipping cost. This is the best way to verify performance and compatibility before placing a bulk order.
