SR4 - Short Fiber Rigid Insulation Felt

SR4 is a premium, rayon-based short fiber graphite insulation product—available in both cylinder and board forms—designed specifically for SiC substrate and epitaxy furnace environments. Manufactured to meet or exceed European quality standards, SR4 delivers exceptional performance with faster lead times and greater cost efficiency.

Key Highlights

Industrial-Grade Quality

On par with top European competitors but more cost-effective, ensuring high-end performance without the premium price tag.

Consistent Purity

Featuring ultra-low ash content (< 20 ppm) and tight manufacturing tolerances, SR4 guarantees reliable thermal insulation and chemical stability.

Optimized Thermal Performance

Developed for high-temperature and vacuum furnace applications, SR4 provides dependable insulation, minimal outgassing, and excellent structural integrity.

Technical Specifications

PropertyTypical Value
Density (g/cm³)0.14
Flexural Strength (MPa)1.5
Compressive Strength (MPa)1.08
Coefficient of Thermal Expansion (30–1700 °C) 10⁻⁶/K3.0
Thermal Conductivity at 400 °C W/(m·K)0.21
Thermal Conductivity at 800 °C W/(m·K)0.23
Thermal Conductivity at 1200 °C W/(m·K)0.26
Thermal Conductivity at 1700 °C W/(m·K)0.43
Purity (C)99.99927%
TMI7.27 ppmwt

All values are typical and subject to variation. For technical data sheets or custom recommendations, please contact Max Graphite.

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