Oxidation Resistant Flexible Graphite Sheet 0.15-5.0mm Thickness 450°C Continuous Temperature For Automotive Exhaust Systems
Advanced oxidation-resistant graphite sheets, foils, tapes, and strips engineered to withstand oxidative degradation while maintaining exceptional flexibility for demanding industrial applications.
Natural graphite undergoes acid intercalation followed by rapid thermal expansion at 900-1200°C, creating vermiform expanded graphite with porous density of 0.0032g/cm³. The oxidation-resistant variant incorporates proprietary antioxidant treatments during calendaring, eliminating binder dependency while enhancing air stability.
- Oxidative Stability: Withstands continuous operation at 450°C in oxygen-rich environments (vs. 300°C standard grades)
- Multi-Environmental Resistance: Chemical resistance to acidic/alkaline corrosion (pH 0-14), thermal integrity from -240°C to +2800°C (intermittent), and mechanical durability with 90% compression recovery after 10,000 cycles
- Hybrid Compatibility: Bonds with SUS304/Inconel sheets via diffusion welding for reinforced composites
- High-Temperature Sealing: Oxidation-resistant packing rings for steelmaking furnace doors & gas turbine flanges
- Aerospace Thermal Management: Lightweight gaskets in rocket engine fuel lines and re-entry vehicle insulation
- Automotive Exhaust Systems: Custom-shaped composite gaskets for turbocharger housings and EGR valves
- Semiconductor Manufacturing: Ultra-clean seals in CVD chamber assemblies requiring oxidation control
| Parameter | Coil | Plate |
|---|---|---|
| Width Range | 1000/1500mm | 1000/1500mm |
| Thickness | 0.15-1.0mm | 1.0-5.0mm |
| Density | 0.8-1.3g/cm³ | 0.8-1.3g/cm³ |
| Oxidation Limit | 450°C (continuous) | 500°C (intermittent) |
| Property | Standard Value |
|---|---|
| Carbon Concentration | 99% |
| Sulfur Concentration | <1000ppm |
| Chlorine Concentration | <45ppm |
| Tensile Strength | 4.5MPa |
| Compressibility | >40% |
| Recovery | >10% |
| Temperature Range | -200°C to 600°C |
| Pressure Rating | 20MPa |
| Mechanical Data | Qualified Product | Top Grade | Superior Grade |
|---|---|---|---|
| Tensile Strength (MPa) | ≥3.2 | ≥4.5 | ≥5.0 |
| Compression Ratio (%) | 35-55 | ||
| Rebound Rate (%) | ≥9 | ≥11 | ≥12 |
| Stress Relaxation Rate (%) | ≤10 | ||
| Ash (%) | ≤6.0 | ≤3.0 | ≤1.0 |
| Sulfur Content (ppm) | ≤1500 | ≤1000 | ≤600 |
| Chloride Content (ppm) | ≤100 | ≤50 | ≤20 |
- Anti-oxidation coatings (SiC/Al₂O₃ nano-layer)
- Pre-cut gasket patterns with laser precision
- Multi-layer laminated structures with alloy meshes
Meets ASTM F104 Class 3 and DIN 28091-2 standards, offering 3X lifespan improvement over conventional graphite seals in oxidative conditions.
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