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Ceramic Material Comparison Chart

Explore our interactive ceramic material comparison chart below, designed to help you easily compare different materials based on their key properties, and find the best fit for your application.

SC0977 Silicon Carbide Gasket, SiC Gasket

Name: SC0977 Silicon Carbide Gasket, SiC Gasket
Brand: Advanced Ceramic Materials
SKU: SC0977
Availability: InStock
Rating: 4.9 (166 reviews)

Catalog No. SC0977
Molecular Formula SiC
Molecular Weight 40.1
Appearance Black
Melting Point 2,730° C (4,946° F) (decomposes)
Density 3.0 to 3.2 g/cm3
Electrical Resistivity 1 to 4 10x Ω-m
Poisson's Ratio 0.15 to 0.21
Specific Heat 670 to 1180 J/kg-K

Datasheet

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SC0977 Silicon Carbide Gasket, SiC Gasket

Silicon Carbide Gasket Description

Silicon Carbide (SiC) gaskets from Advanced Ceramic Materials (ACM) provide reliable static sealing solutions for high-temperature, corrosive, and vacuum environments. Engineered for flange connections, pipe joints, heat exchanger seals, and furnace doors, these precision-machined gaskets maintain sealing integrity under extreme conditions where metallic and polymer gaskets fail prematurely.

Silicon Carbide Gasket Specifications

Physical Property	Value
Material	Silicon Carbide (SiC)
Color	Black
Density	3.0 – 3.2 g/cm³
Hardness	Hv ≥ 26 GPa
Melting Point	2730°C (decomposes)
Max. Service Temp (Oxidizing)	1600°C
Electrical Resistivity	1 – 4 × 10⁻² Ω·m
Poisson's Ratio	0.15 – 0.21
Specific Heat	670 – 1180 J/kg·K

Available Grades – Sintered vs. Reaction-Bonded

Type	Grade	Description	Purity	Recommended Use
Sintered SiC (S-SiC)	SMB1	Basic pure SiC	> 98%	General chemical-resistant static seals
Sintered SiC (S-SiC)	SMG1	Graphite-impregnated	> 98%	Self-lubricating gaskets for dry sealing
Sintered SiC (S-SiC)	SMP1	Porous SiC	> 98%	Vented or permeable seal applications
Reaction-Bonded SiC (RB-SiC)	SMB2	Basic SiC	> 88%	Cost-effective general-purpose gaskets
Reaction-Bonded SiC (RB-SiC)	SMG2	Graphite-impregnated	> 88%	Low-friction static seal applications

Silicon Carbide Gasket Applications

Chemical Processing – Flange gaskets for piping systems handling aggressive acids, chlorinated solvents, and caustic media
High-Temperature Furnaces – Door seals and viewport seals for industrial kilns and heat treatment furnaces
Heat Exchangers – Gaskets for shell-and-tube and plate-type heat exchangers operating at elevated temperatures
Vacuum Systems – Sealing components for vacuum chambers and thin-film deposition equipment
Semiconductor Manufacturing – Process chamber seals where metallic contamination must be avoided

Quality Assurance

Every SiC gasket shipment from ACM includes a complete Certificate of Analysis (COA) documenting:

Chemical composition and SiC purity
Dimensional inspection report
Density and hardness measurements
Visual inspection for surface defects

ACM maintains ISO-compliant quality systems to ensure lot-to-lot consistency and full material traceability.

Packing Service

Individually packaged to prevent edge chipping and surface damage
Custom kitting available for multi-component seal assemblies
US-based inventory for standard sizes

Frequently Asked Questions

What is the maximum operating temperature for SiC gaskets?
Sintered SiC gaskets can operate continuously at temperatures up to 1600°C in oxidizing atmospheres. For reducing atmospheres or vacuum conditions, please consult ACM's technical team for specific recommendations.

Are SiC gaskets suitable for flange sealing in aggressive chemical service?
Yes. Silicon carbide exhibits exceptional corrosion resistance to most mineral acids, organic acids, and caustic solutions, making it an excellent choice for demanding chemical processing flange connections.

What gasket thicknesses are available?
ACM offers standard thicknesses from 1mm to 20mm in various profiles. Custom thicknesses and non-standard shapes are available upon request.

Can SiC gaskets withstand thermal cycling?
Yes. SiC's low thermal expansion coefficient and high thermal conductivity provide excellent thermal shock resistance, allowing gaskets to survive repeated temperature cycling without cracking.

What is the difference between sintered SiC and reaction-bonded SiC for gaskets?
Sintered SiC offers higher purity (>98%) and superior chemical resistance, making it ideal for corrosive media applications. Reaction-bonded SiC contains 8–12% free silicon, providing slightly lower chemical resistance but better cost efficiency for less demanding static seals.