PU-HighTemp
PU-HighTemp is a polyurethane vacuum-casting resin (PX5210 HT, Axson F16) formulated for elevated heat deflection temperature, with 65 MPa tensile strength, 8 % elongation, Shore D 85 and service to 110 °C.
Reference datasheet — PU-HighTemp 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.
PU-HighTemp grades and fills
PU-HighTemp is supplied in 7 conditions, soft to hard.
Compare all 7 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
As-cast | Take parts delivered with room-temperature cure only for appearance models: dimensionally stable but heat resistance stops at 60 °C service and 75 °C Tg, far short of the rated level. | 45 | 55 | 12 | 80 Shore D |
Impact-modified high-heat PU | Choose the impact-modified version for snap fits and thin-wall housings needing drop toughness, with 25% elongation and PC/ABS-like behaviour, where slightly lower HDT is acceptable. | 45 | 55 | 25 | 80 Shore D |
Aluminium-powder filled high-heat PU | Use the aluminium-powder filled version for cast parts needing a metallic look, 0.6 W/m·K conductivity and 4.5 GPa stiffness, such as lamp reflectors and mould-insert prototypes. | 50 | 2 | ||
Flame-retardant high-heat PU | Specify the flame-retardant version for electrical enclosures and rail or cabin interior prototypes that must meet UL 94 V-0; service temperature is 100 °C at 55 MPa tensile. | 50 | 55 | 4 | 87 Shore D |
Transparent / optical high-heat PU | Pick the transparent aliphatic system for lenses, light guides and viewing windows; it resists yellowing but costs more and has somewhat lower heat resistance than the standard casting resin. | 52 | 60 | 10 | 82 Shore D |
Mineral / glass-microsphere filled high-heat PU | Choose the mineral or glass-microsphere filled version for fixtures and brackets needing higher stiffness at 4.2 GPa, lower CTE and dimensional stability; elongation drops to 3%. | 58 | 3 | 88 Shore D | |
Extended high-temperature post-cure | Pick the extended 100–120 °C ramped post-cure for the highest HDT and Tg (140 °C Tg, 130 °C service); the trade-offs are lower toughness at 5% elongation and more post-cure distortion. | 62 | 70 | 5 | 87 Shore D |
Supply forms, finishes and certifications
Ways PU-HighTemp is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
UV | UV-stabilized / aliphatic weatherable high-heat PU | Grade option |
NATDefault | Unfilled / Natural | Standard supply |
What is PU-HighTemp?
PU-HighTemp is a polyurethane vacuum-casting resin (PX5210 HT, Axson F16) formulated for elevated heat deflection temperature, with 65 MPa tensile strength, 8 % elongation, Shore D 85 and service to 110 °C. Engineers use it for prototypes exposed to hot air, reflow-adjacent assembly or engine-bay conditions where standard PU softens. It is a thermoset, so it cannot be welded, the rated HDT is only reached after a stepped oven post-cure, and pot life is short with reduced silicone mould life. NAT, GREEN, PC-HT, MF, AL, FR-V0, IM, TRANS and UV conditions are on file; machinability score is 70. PU-HighTemp has a density of 1.16 g/cm³ (0.0419 lb/in³), heavier than 74% of polyurethane grades. Its glass-transition temperature is 120°C (248 °F). PU-HighTemp has a tensile strength of 65 MPa (9.43 ksi), stronger than 98% of polyurethane grades. Elongation at break is 8% and the elastic modulus is 2.6 GPa (0.377 Msi).
What is PU-HighTemp used for?
- Under-hood prototypes
- Reflow-adjacent housings
- Thermal cycling test parts
- Lighting fixture prototypes
Advantages
- High service temperature — 110°C (230 °F), better than 95% of polyurethane grades
- Low moisture uptake — 0.25%, better than 93% of polyurethane grades
- Stiff — 2.6 GPa (0.377 Msi), better than 83% of polyurethane grades
Limitations
- Limited ductility — 8%, worse than 76% of polyurethane grades
PU-HighTemp properties
Typical room-temperature values; bars are the position among polyurethane grades.
Physical4
PU-HighTemp has a density of 1.16 g/cm³ (0.0419 lb/in³), heavier than 74% of polyurethane grades. Its glass-transition temperature is 120°C (248 °F).
Mechanical11
PU-HighTemp has a tensile strength of 65 MPa (9.43 ksi), stronger than 98% of polyurethane grades. Elongation at break is 8% and the elastic modulus is 2.6 GPa (0.377 Msi).
Thermal10
PU-HighTemp is rated for continuous service to 110°C (230 °F). It conducts heat at 0.2 W/m·K (0.116 BTU/hr·ft·°F), worse than 60% of polyurethane grades. Thermal expansion is 80 µm/m·K (44.4 µin/in·°F).
Electrical5
PU-HighTemp is an electrical insulator with a dielectric strength of 20 kV/mm (508 V/mil).
Chemical & Environmental2
UV resistance is poor.
Sustainability3
Producing a kilogram of PU-HighTemp takes about 100 MJ of energy and emits 5.2 kg of CO₂ — less than 83% of polyurethane grades. Typical recycled content is 0%.
Manufacturability4
PU-HighTemp's machinability is very good (70/100, better than 71% of polyurethane 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 polyurethane family
Yield strength against density for every polyurethane grade FabDigit runs. PU-HighTemp is highlighted; hover a dot for its name, or open the interactive family chart.
Working with PU-HighTemp
Is PU-HighTemp easy to machine?
After full cure it mills, drills and taps with sharp carbide at high spindle speed and light feed; avoid local heat build-up that softens the surface. Extract dust at the tool.
Can PU-HighTemp be welded?
Thermoset — no heat welding is possible. Assemble with epoxy or cyanoacrylate adhesive, threaded inserts or self-tapping screws.
Can PU-HighTemp be formed, bent or molded?
Vacuum casting: weigh A and B accurately by mass, degas and pour into silicone moulds preheated to 60–80 °C. The manufacturer's stepped oven post-cure (typically 80 °C for 2–4 h plus 100–120 °C) is mandatory to reach the rated HDT; heat-resistant formulations have a short working life and shorten silicone mould life compared with room-temperature PU.
PU-HighTemp 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 |
|---|---|---|
| polyol (polyester/polyether, high functiA-side base; short-chain polyol raises crosslink density and Tg | 35 – 60 | 45 |
| chain extender / crosslinker (diol, diam | 1 – 8 | 3 |
| mineral / glass or aluminium fillerfilled variants only; 0 in unfilled grades | 0 – 45 | 0 |
| flame retardant (phosphorus / ATH)FR V-0 variants only | 0 – 25 | 0 |
| catalyst, UV stabilizer, pigment, defoam | 0.1 – 3 | 1 |
| isocyanate (MDI / modified pMDI)B-side; aliphatic HDI/IPDI for clear and weatherable variants | ≥ 35 (balance) |
What surface finishes work on PU-HighTemp?
Sands, primes, paints, screen-prints and vacuum-metallises (aluminium) well. Aromatic systems without a UV additive need a UV-blocking topcoat to prevent yellowing.
Equivalent designations
Standards and trade names that resolve to PU-HighTemp in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Also called
- HDT >100C PU Resin
How much does PU-HighTemp cost?
PU-HighTemp is a high-cost polyurethane ($$$$), pricier than about 78% 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.
PU-HighTemp — frequently asked
What is PU-HighTemp used for?
PU-HighTemp is typically used for under-hood prototypes, reflow-adjacent housings, thermal cycling test parts and lighting fixture prototypes. In short: highest service temperature PU; 110 °C cast prototypes; post-cure sets the HDT.
What is the tensile strength of PU-HighTemp?
PU-HighTemp has a typical tensile strength of 65 MPa (9.43 ksi) — stronger than 98% of polyurethane grades. Strength varies by condition: see the 7 listed tempers.
Is PU-HighTemp easy to machine?
Yes — machinability is rated very good (70/100, better than 71% of polyurethane grades). After full cure it mills, drills and taps with sharp carbide at high spindle speed and light feed; avoid local heat build-up that softens the surface. Extract dust at the tool.
Can PU-HighTemp be welded?
Thermoset — no heat welding is possible. Assemble with epoxy or cyanoacrylate adhesive, threaded inserts or self-tapping screws.
What surface finishes work on PU-HighTemp?
Sands, primes, paints, screen-prints and vacuum-metallises (aluminium) well. Aromatic systems without a UV additive need a UV-blocking topcoat to prevent yellowing.
Can PU-HighTemp be formed, bent or molded?
Vacuum casting: weigh A and B accurately by mass, degas and pour into silicone moulds preheated to 60–80 °C. The manufacturer's stepped oven post-cure (typically 80 °C for 2–4 h plus 100–120 °C) is mandatory to reach the rated HDT; heat-resistant formulations have a short working life and shorten silicone mould life compared with room-temperature PU.
What is the maximum service temperature of PU-HighTemp?
PU-HighTemp is rated for continuous use to about 110°C (230 °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 PU-HighTemp cost?
PU-HighTemp is a high-cost polyurethane ($$$$), pricier than about 78% 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
- ISO 75-2 Plastics — Determination of temperature of deflection under load — ISO (2013)
- Polyurethanes Handbook (thermoset casting systems) — Hanser (1994)
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.