Torlon 4203 vs Torlon 4301
Polymer · grade comparison
Torlon 4203 and Torlon 4301 are both polymer grades. Torlon 4203 is the stronger of the two: yield strength 185 MPa (26.8 ksi) against 108 MPa (15.7 ksi) for Torlon 4301, about 71% more; tensile strength follows at 192 MPa (27.8 ksi) vs 117 MPa (17 ksi). Torlon 4203 is the more ductile: elongation 15% versus 7% for Torlon 4301. Torlon 4301 is stiffer (6.8 GPa vs 4.5 GPa) and Torlon 4301 conducts heat better (0.54 W/m·K vs 0.26 W/m·K).
Torlon 4203Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
Torlon 4203 vs Torlon 4301: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all polymer grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all polymer grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Compressive Modulus
Flexural Strength
Flexural Modulus
Shear Strength
Fracture Toughness (K_IC)
Izod Impact, Notched
Hardness, Shore D
Hardness, Rockwell M
Physical
Density and transition temperatures.
Density
Water Absorption (Saturation)
Same in both: Glass Transition (Tg) 275°C527 °F · Water Absorption (24 h) 0.28%
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Heat Deflection Temp. @ 1.8 MPa
Limiting Oxygen Index
Max Service Temperature (short-term)
Same in both: Specific Heat Capacity 1,000 J/kg·K0.24 BTU/lb·°F · Min Service Temperature -196°C-321 °F · Heat Deflection Temp. @ 0.45 MPa 285°C545 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Dielectric Strength
Dielectric Constant (1 MHz)
Dissipation Factor (1 MHz)
Volume Resistivity
Comparative Tracking Index (CTI)
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
UV / Weathering Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Weldability
Polishability
Mold Shrinkage
Processing Melt Temperature (typ.)
Same in both: Machinability 55 / 100 · Formability (cold) 5 / 100 · Mold Temperature (typ.) 215°C419 °F
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Same in both: Typical Recycled Content 0%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Same in both: Thermal Shock Resistance Index 0
Strength versus weight
Yield strength against density for every polymer grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | Torlon 4203 | Torlon 4301 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Torlon 4203 vs Torlon 4301 — frequently asked
Is Torlon 4203 stronger than Torlon 4301?
Yes. Torlon 4203 has a typical yield strength of 185 MPa (26.8 ksi) against 108 MPa (15.7 ksi) for Torlon 4301 — about 71% more. Tensile strength is 192 MPa (27.8 ksi) vs 117 MPa (17 ksi).
Which is cheaper, Torlon 4203 or Torlon 4301?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
When should I choose Torlon 4203 over Torlon 4301?
Pick Torlon 4203 when strength drives the design, or when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Torlon 4203 and Torlon 4301 side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.