Material reference
Silicon Carbide SiC
Extreme thermal conductivity and shock resistance with non-wetting behaviour to molten metals — the high-performance choice for kiln furniture and melt-handling.
Used for: kiln furniture · molten-metal components · thermocouple sheaths · heat exchangers · wear parts · burner tubes
At a glance
Key Properties
High thermal conductivity
Excellent thermal shock resistance
Very high strength and high temperature stability
Non-wetting to molten metals
Very low thermal expansion
High temperature resistance
Products in this material
Silicon Carbide products
More Details
This material is not limited to the products and applications illustrated above. For more information, or to find out about other products/applications, please click here.
Porous silicon carbides with excellent thermal shock, high strength and high temperature operating capability up to 2910 F (1600C). Excellent for use in furnaces and molten metal applications due to it’s non wetting properties. Stock available in tubes, thermocouple sheaths, rods, crucibles and beams
Request the Silicon Carbide datasheet
Full property data, grade comparison, machining guidance and typical applications. EN and FR versions available.
At a glance
Applications
Kiln furniture
Induction heating
Saggers
Semi-con manufacturing
Molten metal processing
Metal filtration
Burner nozzles
At a glance
Grades
Mullite Bonded SiC - 70% SiC (SC70)Mullite Bonded SiC - 90% SiC (SC90)Re-crystallised Silicon Carbide (RSiC)Reaction Bonded Silicon Carbide (RBSiC / SiSiC)Sintered Silicon Carbide (SSiC)Nitride Bonded Silicon Carbide (NBSiC)
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FAQs
Frequent technical questions
Why is SiC so good for kiln furniture?
High thermal conductivity moves heat in and out of the load fast, low expansion plus high strength tolerates rapid cycling, and the carbide doesn’t wet most melts. Together that means faster fires, less cracking and less contamination than oxide alternatives.
When should I choose dense over porous SiC?
Dense (SiSiC, RSiC) is specified where gas-tightness, mechanical loading or wear governs. Porous bonded grades are the workhorse for setters, posts and batts where thermal mass and low cost matter more than peak strength.
Will SiC handle molten aluminium?
Yes — SiC is widely used as immersion heater sheaths, riser tubes and degassing components in aluminium handling. For prolonged contact, check for oxidation protection and free-silicon levels with us before specifying.
How to you decide which silicon carbide grade to use?
Speak to a ceramic expert to find out which grade is suitable for your application due to big differences between the performance and application of each grade?
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Tell us your operating temperature, the chemistry it'll see and any mechanical loads. We'll specify a grade — or recommend an alternative material — and link you directly to matching products.