Graphite Felt vs RP Graphite Electrode
Ceramic · grade comparison
Graphite Felt and RP Graphite Electrode are both ceramic grades. RP Graphite Electrode is the stronger of the two: tensile strength 7 MPa (1.02 ksi) against 0.3 MPa (0.0435 ksi) for Graphite Felt, about 23 times as much. In exchange, Graphite Felt is the more ductile: elongation 10% versus 0.25% for RP Graphite Electrode. Graphite Felt is lighter (0.1 g/cm³ vs 1.56 g/cm³ for RP Graphite Electrode) and RP Graphite Electrode is stiffer (9 GPa vs 0 GPa). On the shop floor, RP Graphite Electrode sits in a lower cost tier (standard, $$) than Graphite Felt (high, $$$$).
Graphite FeltChoose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
RP Graphite ElectrodeChoose it when strength drives the design, or when cost is the deciding factor.
Graphite Felt vs RP Graphite Electrode: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all ceramic grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all ceramic grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Graphite FeltRP Graphite Electrode
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Elongation at Break
Compressive Strength
Flexural Strength
Shear Strength
Shear Modulus
Poisson's Ratio
Fracture Toughness (K_IC)
Hardness, Vickers
Hardness, Mohs
Physical
Density and transition temperatures.
Density
Porosity
Same in both: Melting Point (Solidus) 3,650°C6,602 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Thermal Expansion (CTE, 20–100 °C)
Same in both: Specific Heat Capacity 710 J/kg·K0.17 BTU/lb·°F · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Volume Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Sintering / Firing Temperature
Polishability
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Same in both: Typical Recycled Content 5%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Thermal Diffusivity
Strength versus weight
Yield strength against density for every ceramic grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | Graphite Felt | RP Graphite Electrode |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$ Standard |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Graphite Felt vs RP Graphite Electrode — frequently asked
Is RP Graphite Electrode stronger than Graphite Felt?
Yes. RP Graphite Electrode has a typical tensile strength of 7 MPa (1.02 ksi) against 0.3 MPa (0.0435 ksi) for Graphite Felt — about 23 times as much.
Which is cheaper, Graphite Felt or RP Graphite Electrode?
RP Graphite Electrode is the lower-cost material: it sits in the standard tier ($$) while Graphite Felt is high ($$$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which is easier to machine, Graphite Felt or RP Graphite Electrode?
Graphite Felt, by a small margin. Both rate excellent for machinability — 95/100 against 90/100 for RP Graphite Electrode.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Graphite Felt and RP Graphite Electrode side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.