XXXPC
ASTM D709 Grade XXXPC, D709 Type XXXPC
XXXPC is an oil-resistant punching-grade phenolic-paper laminate to ASTM D709 Grade/Type XXXPC.
Reference datasheet — XXXPC is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
XXXPC grades and fills
XXXPC is supplied in one standard condition, FR.
Supply forms, finishes and certifications
Ways XXXPC is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
ROD | ROD/TUBE | Supply form |
CCL | Copper-clad paper phenolic laminate | Coating |
NATDefault | Natural (unclad) cold-punching sheet | Standard supply |
What is XXXPC?
XXXPC is an oil-resistant punching-grade phenolic-paper laminate to ASTM D709 Grade/Type XXXPC. It is used for components that must retain insulating properties when immersed in transformer or switch oil, and is supplied as sheet, copper-clad sheet and rod. Tensile strength is 110 MPa with a maximum service temperature of 120 °C; the cured laminate cannot be re-formed and cut edges need sealing against moisture. Choose XXXP where oil immersion is not a requirement, or epoxy-glass G-10/3240 where higher mechanical strength is needed. XXXPC has a density of 1.35 g/cm³ (0.0488 lb/in³), lighter than 75% of composite grades. Its glass-transition temperature is 150°C (302 °F). XXXPC has a tensile strength of 110 MPa (16 ksi), weaker than 64% of composite grades. Elongation at break is 1.5% and the elastic modulus is 8 GPa (1.16 Msi).
What is XXXPC used for?
- oil-immersed transformer insulation
- switchgear components in oil
- punched insulating parts
Advantages
- Low embodied carbon — 4 kg CO₂/kg, better than 91% of composite grades
- Easy to machine — 70/100, better than 77% of composite grades
- Lightweight — 1.35 g/cm³ (0.0488 lb/in³), better than 75% of composite grades
Limitations
- Needs corrosion protection — 55/100, worse than 87% of composite grades
- Limited service temperature — 120°C (248 °F), worse than 78% of composite grades
- Poor heat conductor — 0.25 W/m·K (0.144 BTU/hr·ft·°F), worse than 76% of composite grades
XXXPC properties
Typical room-temperature values; bars are the position among composite grades.
Physical4
XXXPC has a density of 1.35 g/cm³ (0.0488 lb/in³), lighter than 75% of composite grades. Its glass-transition temperature is 150°C (302 °F).
Mechanical11
XXXPC has a tensile strength of 110 MPa (16 ksi), weaker than 64% of composite grades. Elongation at break is 1.5% and the elastic modulus is 8 GPa (1.16 Msi).
Thermal8
XXXPC is rated for continuous service to 120°C (248 °F). It conducts heat at 0.25 W/m·K (0.144 BTU/hr·ft·°F), worse than 76% of composite grades. Thermal expansion is 25 µm/m·K (13.9 µin/in·°F).
Electrical7
XXXPC is an electrical insulator with a dielectric strength of 20 kV/mm (508 V/mil) and a resistivity of 1×10¹⁰ Ω·m.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 87% of composite grades. UV resistance is poor.
Sustainability4
Producing a kilogram of XXXPC takes about 75 MJ of energy and emits 4 kg of CO₂ — less than 91% of composite grades. Typical recycled content is 0%.
Manufacturability2
XXXPC's machinability is very good (70/100, better than 77% of composite grades).
Common Calculations4
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the composite family
Yield strength against density for every composite grade FabDigit runs. XXXPC is highlighted; hover a dot for its name, or open the interactive family chart.
Working with XXXPC
Is XXXPC easy to machine?
Cuts and drills easily with sharp carbide tooling and high speed/low feed, but paper dust is abrasive and irritating — use dust extraction and back the workpiece to avoid edge delamination.
Can XXXPC be welded?
Thermoset — not weldable; join by riveting, bolting or epoxy/phenolic adhesive bonding.
Can XXXPC be formed, bent or molded?
Primary process is cold blanking/punching at room temperature in gauges up to about 3.2 mm; no post-cure reforming is possible, and thicker sheet may need slight warming for clean punched edges.
XXXPC 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 |
|---|---|---|
| cellulose kraft paper (reinforcement)electrical-grade unbleached kraft web | 45 – 60 | 52 |
| plasticizer / punching aiddistinguishes cold-punch XXXPC from hot-punch XXXP | 0 – 5 | 2 |
| brominated flame retardantFR variant only | 0 – 8 | 0 |
| phenol-formaldehyde (resole/novolac) resplasticized resin system to allow room-temperature punching | ≥ 38 (balance) |
What surface finishes work on XXXPC?
Sand or deburr edges and seal with insulating varnish or epoxy to limit moisture wicking; can be painted but not plated or anodized.
Equivalent designations
Standards and trade names that resolve to XXXPC in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- ASTM
- D709 Grade XXXPCD709 Type XXXPC
- Also called
- NEMA XXXPC
How much does XXXPC cost?
XXXPC is a standard-cost composite ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
XXXPC — frequently asked
What is XXXPC used for?
XXXPC is typically used for oil-immersed transformer insulation, switchgear components in oil and punched insulating parts. In short: oil-resistant punching grade; highest strength of paper series; transformer-oil service laminate.
What is the tensile strength of XXXPC?
XXXPC has a typical tensile strength of 110 MPa (16 ksi) — weaker than 64% of composite grades.
Is XXXPC easy to machine?
Yes — machinability is rated very good (70/100, better than 77% of composite grades). Cuts and drills easily with sharp carbide tooling and high speed/low feed, but paper dust is abrasive and irritating — use dust extraction and back the workpiece to avoid edge delamination.
Can XXXPC be welded?
Thermoset — not weldable; join by riveting, bolting or epoxy/phenolic adhesive bonding.
What surface finishes work on XXXPC?
Sand or deburr edges and seal with insulating varnish or epoxy to limit moisture wicking; can be painted but not plated or anodized.
Can XXXPC be formed, bent or molded?
Primary process is cold blanking/punching at room temperature in gauges up to about 3.2 mm; no post-cure reforming is possible, and thicker sheet may need slight warming for clean punched edges.
What is the maximum service temperature of XXXPC?
XXXPC is rated for continuous use to about 120°C (248 °F), and briefly to 150°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does XXXPC cost?
XXXPC is a standard-cost composite ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- ASTM D709 — Standard Specification for Laminated Thermosetting Materials — ASTM International (2017)
- NEMA LI 1 — Industrial Laminated Thermosetting Products — NEMA (1998)
- IEC 60893-3-4 — Industrial rigid laminated sheets, phenolic cellulose paper (PF CP) types — IEC (2013)
- Paper-based phenolic laminate grade data (XXX/XXXP/XXXPC) — Norplex-Micarta / Franklin Fibre / Spaulding Composites (2022)
- Engineered Materials Handbook Vol. 2 — Engineering Plastics — ASM International (1988)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.