High Temp
Grade
also High Temp Resin, High Temperature Resin
Pick for mold inserts, hot-gas and hot-fluid fixtures needing the full ~238 °C HDT rating; accept lower elongation and impact after the oven cycle.
Values for the High Temp condition
What is High Temp?
High Temp is High Temp in the High Temp grade — pick for mold inserts, hot-gas and hot-fluid fixtures needing the full ~238 °C HDT rating; accept lower elongation and impact after the oven cycle. High Temp has a tensile strength of 52 MPa (7.5 ksi), stronger than 55% of polymer grades. Elongation at break is 2% and the elastic modulus is 3.6 GPa (0.522 Msi). High Temp has a density of 1.19 g/cm³ (0.043 lb/in³), heavier than 53% of polymer grades. Its glass-transition temperature is 130°C (266 °F).
Advantages
- Stiff — 3.6 GPa (0.522 Msi), better than 84% of polymer grades
- High service temperature — 170°C (338 °F), better than 83% of polymer grades
Limitations
- Limited ductility — 2%, worse than 95% of polymer grades
- Needs corrosion protection — 70/100, worse than 78% of polymer grades
- Absorbs moisture — dry before molding — 0.6%, worse than 75% of polymer grades
High Temp properties
Typical room-temperature values for High Temp; 12 are specific to this condition. Other listed values are High Temp reference data and may not represent this condition. Bars are the position among polymer grades.
Physical3
High Temp has a density of 1.19 g/cm³ (0.043 lb/in³), heavier than 53% of polymer grades. Its glass-transition temperature is 130°C (266 °F).
Mechanical10
High Temp has a tensile strength of 52 MPa (7.5 ksi), stronger than 55% of polymer grades. Elongation at break is 2% and the elastic modulus is 3.6 GPa (0.522 Msi).
Thermal8
High Temp is rated for continuous service to 170°C (338 °F). It conducts heat at 0.2 W/m·K (0.116 BTU/hr·ft·°F), worse than 56% of polymer grades. Thermal expansion is 75 µm/m·K (41.7 µin/in·°F).
Electrical3
High Temp has an electrical resistivity of 1×10¹² Ω·m.
Chemical & Environmental3
Corrosion resistance is very good (70/100), worse than 78% of polymer grades. UV resistance is fair.
Sustainability3
Producing a kilogram of High Temp takes about 110 MJ of energy and emits 5.5 kg of CO₂ — more than 64% of polymer grades. Typical recycled content is 0%.
Manufacturability2
High Temp's machinability is fair (50/100, worse than 73% of polymer grades).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with High Temp
Is High Temp easy to machine?
Drills, taps and mills cleanly with sharp carbide and light feeds, but is notch-sensitive — chamfer edges, avoid deep unsupported cuts and keep it cool.
Can High Temp be welded?
Not weldable (thermoset); join with epoxy or methacrylate adhesives, or design mechanical/threaded-insert joints.
Can High Temp be formed, bent or molded?
Formed only by SLA/DLP printing at 405 nm — use generous wall thickness and supports, isopropanol wash, full UV cure, then the oven thermal post-cure to unlock the 238 °C HDT.
What surface finishes work on High Temp?
Sand and polish or bead-blast to hide layer lines; prime and paint for cosmetic parts and use an opaque coating outdoors, since bare resin yellows and embrittles under UV.
High Temp 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 |
|---|---|---|
| urethane/epoxy methacrylate oligomersproprietary blend; forms the crosslinked backbone | 40 – 65 | 55 |
| multifunctional methacrylate monomers (chigh crosslink density gives the elevated HDT | 20 – 40 | 30 |
| inorganic filler (silica / glass)used in some high-temp formulations to raise stiffness and lower CTE | 0 – 20 | 10 |
| photoinitiator + stabilizers/pigment405 nm initiator package | 0.5 – 4 | 2 |
High Temp — frequently asked
What is High Temp used for?
High Temp is typically used for vacuum forming moulds, low-volume injection moulding inserts, hot-air and hot-liquid flow fixtures, aerospace prototypes, casting and pattern tooling and heat-resistant inspection fixtures. In short: high-heat photopolymer resin.
What is the tensile strength of High Temp?
High Temp has a typical tensile strength of 52 MPa (7.5 ksi) — stronger than 55% of polymer grades.
Is High Temp easy to machine?
Reasonably — machinability is rated fair (50/100, worse than 73% of polymer grades). Drills, taps and mills cleanly with sharp carbide and light feeds, but is notch-sensitive — chamfer edges, avoid deep unsupported cuts and keep it cool.
Can High Temp be welded?
Not weldable (thermoset); join with epoxy or methacrylate adhesives, or design mechanical/threaded-insert joints.
What surface finishes work on High Temp?
Sand and polish or bead-blast to hide layer lines; prime and paint for cosmetic parts and use an opaque coating outdoors, since bare resin yellows and embrittles under UV.
Can High Temp be formed, bent or molded?
Formed only by SLA/DLP printing at 405 nm — use generous wall thickness and supports, isopropanol wash, full UV cure, then the oven thermal post-cure to unlock the 238 °C HDT.
What is the maximum service temperature of High Temp?
High Temp is rated for continuous use to about 170°C (338 °F), and briefly to 238°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in High Temp?
Yes — High Temp is available for injection molding and 3D printing with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- High Temp Resin (SLA photopolymer) technical data sheet, incl. thermal post-cure schedule — Formlabs (2023)
- ASTM D648 — Deflection Temperature of Plastics Under Flexural Load — ASTM (2018)
- ASTM D638 / D790 / D256 — tensile, flexural and Izod impact of plastics — ASTM (2022)
- Additive Manufacturing Technologies — vat photopolymerization materials chapter — Springer (2021)
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.