Impervious Graphite FU
Grade
GB GB/T 12762
FU = furan-resin impregnated graphite
Pick when service is hotter (to ~190–200 °C) or contains alkali/solvent mixtures that swell phenolic.
Values for the FU condition
Other Impervious Graphite tempers and conditions
Impervious Graphite is listed in 3 conditions; see the grade overview at Impervious Graphite.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
PTFE / fluoropolymer impregnated graphite | Use for very aggressive or high-purity duty (HF, mixed halide acids, pharma) where resin extractables are unacceptable. | — | 20 | 0.4 | 20 HV | 100 W/m·K |
FUThis page Furan-resin impregnated graphite | Pick when service is hotter (to ~190–200 °C) or contains alkali/solvent mixtures that swell phenolic. | — | 24 | 0.3 | 25 HV | 110 W/m·K |
PHDefault Pre-hardened | Standard choice for hydrochloric/sulfuric/phosphoric acid heat exchangers and columns up to about 170 °C. | — | 25 | 0.3 | 50 HV | 125 W/m·K |
What is Impervious Graphite FU?
Impervious Graphite FU is Impervious Graphite in the FU grade — pick when service is hotter (to ~190–200 °C) or contains alkali/solvent mixtures that swell phenolic. Impervious Graphite FU has a tensile strength of 24 MPa (3.48 ksi), weaker than 87% of ceramic grades. Elongation at break is 0.3% and the elastic modulus is 12 GPa (1.74 Msi). Impervious Graphite FU has a density of 1.82 g/cm³ (0.0658 lb/in³), lighter than 88% of ceramic grades. PH is the default condition FabDigit quotes; FU is available on request or by drawing note.
Advantages
- Ductile — tolerates forming and impact — 0.3%, better than 91% of ceramic grades
- Easy to machine — 78/100, better than 89% of ceramic grades
- Lightweight — 1.82 g/cm³ (0.0658 lb/in³), better than 88% of ceramic grades
- Conducts heat well — 110 W/m·K (63.6 BTU/hr·ft·°F), better than 86% of ceramic grades
- Good corrosion resistance — 90/100, better than 81% of ceramic grades
Limitations
- Low stiffness — 12 GPa (1.74 Msi), worse than 89% of ceramic grades
- Hard to polish — 45/100, worse than 88% of ceramic grades
- Limited service temperature — 190°C (374 °F), worse than 85% of ceramic grades
Impervious Graphite FU properties
Typical room-temperature values for Impervious Graphite FU; 15 are specific to this condition. Other listed values are Impervious Graphite reference data and may not represent this condition. Bars are the position among ceramic grades.
Physical2
Impervious Graphite FU has a density of 1.82 g/cm³ (0.0658 lb/in³), lighter than 88% of ceramic grades.
Mechanical10
Impervious Graphite FU has a tensile strength of 24 MPa (3.48 ksi), weaker than 87% of ceramic grades. Elongation at break is 0.3% and the elastic modulus is 12 GPa (1.74 Msi).
Thermal5
Impervious Graphite FU is rated for continuous service to 190°C (374 °F). It conducts heat at 110 W/m·K (63.6 BTU/hr·ft·°F), better than 86% of ceramic grades. Thermal expansion is 4.5 µm/m·K (2.5 µin/in·°F).
Electrical2
Impervious Graphite FU has an electrical resistivity of 1.3×10⁻⁵ Ω·m.
Chemical & Environmental2
Corrosion resistance is excellent (90/100), better than 81% of ceramic grades.
Sustainability3
Producing a kilogram of Impervious Graphite FU takes about 190 MJ of energy and emits 14 kg of CO₂ — more than 62% of ceramic grades. Typical recycled content is 0%.
Manufacturability3
Impervious Graphite FU's machinability is very good (78/100, better than 89% of ceramic grades).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Impervious Graphite FU
Is Impervious Graphite easy to machine?
Machines fast with carbide or PCD dry-cut tooling, but dust is abrasive and electrically conductive — vacuum extraction and sharp positive-rake tools are mandatory to avoid edge chipping.
Can Impervious Graphite be welded?
Not weldable; joints are made with corrosion-resistant carbon-filled resin cements or mechanically flanged with PTFE gaskets.
Can Impervious Graphite be formed, bent or molded?
Shape is produced by extrusion/moulding or isostatic pressing of the green body, baking and graphitising, then vacuum-pressure resin impregnation and cure — no post-cure forming is possible.
What surface finishes work on Impervious Graphite?
Surfaces are ground or lapped; no coating is normally used, and any surface resin skin should be removed to expose the impregnated body for good heat transfer.
Impervious Graphite chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| phenolic or furan resinimpregnant, cured; PTFE in the fluoropolymer variant | 10 – 18 | 14 |
| ashtypical for corrosion grades | 0 – 0.3 | 0.1 |
| S | 0 – 0.05 | 0.02 |
| C (graphite matrix)graphitised petroleum-coke / pitch body | ≥ 82 (balance) | — |
Impervious Graphite FU — frequently asked
What is Impervious Graphite FU used for?
Impervious Graphite FU is typically used for heat exchangers, acid coolers, reaction vessels and chemical process piping. In short: zero-porosity acid-service graphite; high conductivity, acid-proof; resin limits use to 170 °C.
What is the tensile strength of Impervious Graphite FU?
Impervious Graphite FU has a typical tensile strength of 24 MPa (3.48 ksi) — weaker than 87% of ceramic grades. Strength varies by condition: see the 3 listed tempers.
Is Impervious Graphite FU easy to machine?
Yes — machinability is rated very good (78/100, better than 89% of ceramic grades). Machines fast with carbide or PCD dry-cut tooling, but dust is abrasive and electrically conductive — vacuum extraction and sharp positive-rake tools are mandatory to avoid edge chipping.
Can Impervious Graphite FU be welded?
Not weldable; joints are made with corrosion-resistant carbon-filled resin cements or mechanically flanged with PTFE gaskets.
What surface finishes work on Impervious Graphite FU?
Surfaces are ground or lapped; no coating is normally used, and any surface resin skin should be removed to expose the impregnated body for good heat transfer.
Can Impervious Graphite FU be formed, bent or molded?
Shape is produced by extrusion/moulding or isostatic pressing of the green body, baking and graphitising, then vacuum-pressure resin impregnation and cure — no post-cure forming is possible.
What is the maximum service temperature of Impervious Graphite FU?
Impervious Graphite FU is rated for continuous use to about 190°C (374 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- Graphilor impervious graphite grades — Mersen (2022)
- DIABON impregnated graphite for process equipment — SGL Carbon (2021)
- ASM Engineered Materials Handbook Vol.4 — Ceramics and Glasses (carbon/graphite section) — ASM International (1991)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.