POM-C GF25
also Celcon GC25, Ultraform N2320 G25
POM-C GF25 is an acetal copolymer compounded with 20-30 % chopped glass fiber, sold as Celcon GC25 and Ultraform N2320 G25.
Reference datasheet — POM-C GF25 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.
Values for the GF25 condition
POM-C GF25 grades and fills
POM-C GF25 is supplied in 10 conditions, soft to hard. GF25 is the default FabDigit quotes; the values on this page are for it.
Compare all 10 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
GF25 uncoupled | Cheapest reinforced option: gives stiffness and low CTE but low fiber–matrix adhesion, so strength stays near unfilled level. | 62 | 2.2 | 86 Shore D | |
10% glass fiber reinforced POM-C | Use when moderate stiffness gain is wanted while keeping much of the toughness and surface quality of unfilled acetal. | 78 | 5 | ||
GF25 low-warpage | Glass plus mineral filler balances shrinkage anisotropy for flat, dimensionally critical plates and covers. | 85 | 3 | 88 Shore D | |
glass reinforced, PTFE lubricated bearing grade | Choose for stiff gears/bushings that also need low friction and low wear against steel. | 100 | 2.5 | 85 Shore D | |
20% glass fiber reinforced POM-C | Intermediate step below GF25 when a little more toughness and easier filling are required. | 105 | 3.5 | 86 Shore D | |
GF25 UV/weather stabilized | Carbon-black plus UV-stabilizer package for outdoor and under-hood parts with sunlight exposure. | 112 | 2.8 | 88 Shore D | |
GF25Default 25% chopped glass fiber reinforced | Standard stiffness/dimensional-stability grade; the default balance of modulus, HDT and moldability. | 115 | 3 | ||
GF25 heat stabilized | For long-term hot-air or hot-water service (e.g. 110–120 °C automotive/appliance parts) where standard stabilization would degrade. | 115 | 3 | 88 Shore D | |
GF25 coupled | Pick when maximum tensile/flexural strength and creep resistance are needed and slight loss of flow is acceptable. | 130 | 3 | 89 Shore D | |
30% glass fiber reinforced POM-C | Highest-stiffness standard reinforced acetal for structural housings and load-carrying brackets; most brittle and most abrasive to tooling. | 130 | 2.5 |
What is POM-C GF25?
POM-C GF25 is an acetal copolymer compounded with 20-30 % chopped glass fiber, sold as Celcon GC25 and Ultraform N2320 G25. The glass raises stiffness, dimensional stability and creep resistance well above unfilled acetal, giving 115 MPa tensile strength, 8.5 GPa modulus and 1.6 g/cm3 density in moulded and extruded stock shapes. Elongation falls to 3 %, so impact strength and surface finish are reduced, and fiber orientation causes anisotropic shrinkage and warpage. Coupled, uncoupled, GF10/GF20/GF30, PTFE, UV, heat-stabilised and low-warp variants are on file; unfilled POM-C is the alternative when toughness or a smooth surface matters more than stiffness. POM-C GF25 has a density of 1.6 g/cm³ (0.0578 lb/in³), heavier than 92% of polymer grades. Its glass-transition temperature is -60°C (-76 °F). POM-C GF25 has a tensile strength of 115 MPa (16.7 ksi), stronger than 92% of polymer grades. Elongation at break is 3% and the elastic modulus is 8.5 GPa (1.23 Msi).
What is POM-C GF25 used for?
- structural gears
- precision housings
- load-bearing brackets
- pump impellers
- electrical connector bodies
Advantages
- Stiff — 8.5 GPa (1.23 Msi), better than 91% of polymer grades
- Conducts heat well — 0.35 W/m·K (0.202 BTU/hr·ft·°F), better than 91% of polymer grades
- Easy to machine — 75/100, better than 78% of polymer grades
Limitations
- Heavy — 1.6 g/cm³ (0.0578 lb/in³), worse than 92% of polymer grades
- Limited ductility — 3%, worse than 83% of polymer grades
- Hard to polish — 30/100, worse than 82% of polymer grades
- Limited formability — 15/100, worse than 79% of polymer grades
- Degrades in UV without stabilisers — 25/100, worse than 76% of polymer grades
POM-C GF25 properties
Typical room-temperature values for POM-C GF25-GF25; bars are the position among polymer grades.
Physical5
POM-C GF25 has a density of 1.6 g/cm³ (0.0578 lb/in³), heavier than 92% of polymer grades. Its glass-transition temperature is -60°C (-76 °F).
Mechanical14
POM-C GF25 has a tensile strength of 115 MPa (16.7 ksi), stronger than 92% of polymer grades. Elongation at break is 3% and the elastic modulus is 8.5 GPa (1.23 Msi).
Thermal11
POM-C GF25 is rated for continuous service to 105°C (221 °F). It conducts heat at 0.35 W/m·K (0.202 BTU/hr·ft·°F), better than 91% of polymer grades. Thermal expansion is 35 µm/m·K (19.4 µin/in·°F).
Electrical7
POM-C GF25 is an electrical insulator with a dielectric strength of 22 kV/mm (558.8 V/mil) and a resistivity of 1×10¹² Ω·m.
Chemical & Environmental3
Corrosion resistance is very good (80/100), worse than 52% of polymer grades. UV resistance is poor.
Sustainability4
Producing a kilogram of POM-C GF25 takes about 85 MJ of energy and emits 3.8 kg of CO₂ — less than 79% of polymer grades. Typical recycled content is 0%.
Manufacturability8
POM-C GF25's machinability is very good (75/100, better than 78% of polymer grades); weldability fair (40/100); formability poor (15/100).
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 polymer family
Yield strength against density for every polymer grade FabDigit runs. POM-C GF25 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with POM-C GF25
Is POM-C GF25 easy to machine?
Machines easily with sharp positive-rake tools and high speeds, but the glass is abrasive — use carbide or PCD, expect 2–4x tool wear vs unfilled POM and dust extraction for fine chips.
Can POM-C GF25 be welded?
Ultrasonic, vibration and hot-plate welding work but joint strength is limited by fiber orientation at the weld line; adhesive bonding requires plasma/flame or chemical surface activation.
Can POM-C GF25 be formed, bent or molded?
Dry lightly (2–3 h at 80–100 °C) if humid, mold at 195–215 °C melt / 80–110 °C tool, avoid melt residence >10 min and >230 °C to prevent formaldehyde evolution; use generous gates and vent for anisotropic shrinkage and warpage control.
POM-C GF25 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 |
|---|---|---|
| glass fiberchopped E-glass, typically 10–13 µm diameter | 23 – 27 | 25 |
| coupling agent / adhesion promotersilane or polyurethane-type; absent in uncoupled compounds | 0 – 1.5 | 0.6 |
| stabilizers (formaldehyde scavenger, ant | 0.2 – 1 | 0.5 |
| pigment / carbon blackblack and UV grades only | 0 – 1 | 0.3 |
| polyoxymethylene copolymer (trioxane/dioPOM-C base resin | ≥ 72 (balance) |
What surface finishes work on POM-C GF25?
Paint and print only after flame/plasma or primer treatment — untreated acetal has very low surface energy; fiber read-through limits gloss, so texture (VDI/EDM) rather than polish is normally specified.
Equivalent designations
Standards and trade names that resolve to POM-C GF25 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Trade names
- Celcon GC25Ultraform N2320 G25
- Also called
- POM+GF25
- Similar grades
- 9988
How much does POM-C GF25 cost?
POM-C GF25 is a standard-cost polymer ($$), 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.
POM-C GF25 — frequently asked
What is POM-C GF25 used for?
POM-C GF25 is typically used for structural gears, precision housings, load-bearing brackets, pump impellers and electrical connector bodies. In short: stiffest acetal grade; low creep under sustained load; abrasive to tooling.
What is the tensile strength of POM-C GF25?
POM-C GF25 has a typical tensile strength of 115 MPa (16.7 ksi) — stronger than 92% of polymer grades. Strength varies by condition: see the 10 listed tempers.
Is POM-C GF25 easy to machine?
Yes — machinability is rated very good (75/100, better than 78% of polymer grades). Machines easily with sharp positive-rake tools and high speeds, but the glass is abrasive — use carbide or PCD, expect 2–4x tool wear vs unfilled POM and dust extraction for fine chips.
Can POM-C GF25 be welded?
With care — weldability is rated fair (40/100). Ultrasonic, vibration and hot-plate welding work but joint strength is limited by fiber orientation at the weld line; adhesive bonding requires plasma/flame or chemical surface activation.
What surface finishes work on POM-C GF25?
Paint and print only after flame/plasma or primer treatment — untreated acetal has very low surface energy; fiber read-through limits gloss, so texture (VDI/EDM) rather than polish is normally specified.
Can POM-C GF25 be formed, bent or molded?
Dry lightly (2–3 h at 80–100 °C) if humid, mold at 195–215 °C melt / 80–110 °C tool, avoid melt residence >10 min and >230 °C to prevent formaldehyde evolution; use generous gates and vent for anisotropic shrinkage and warpage control.
What is the maximum service temperature of POM-C GF25?
POM-C GF25 is rated for continuous use to about 105°C (221 °F), and briefly to 140°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does POM-C GF25 cost?
POM-C GF25 is a standard-cost polymer ($$), 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
- Celcon / Hostaform glass-reinforced acetal copolymer grade data — Celanese (2023)
- Ultraform N2320 G-series (glass-fibre reinforced POM) product information — BASF (2022)
- CAMPUS plastics database — POM-C GF25 ISO 10350 datasets — CWFG / CAMPUS consortium (2024)
- Engineered Materials Handbook Vol. 2: Engineering Plastics — ASM International (1988)
- ISO 9988-2 Polyoxymethylene (POM) moulding and extrusion materials — Preparation of test specimens and determination of properties — ISO (2020)
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.