Durus vs Rigur
Polymer · grade comparison
Durus and Rigur are both polymer grades. Rigur is the stronger of the two: yield strength 38 MPa (5.51 ksi) against 22 MPa (3.19 ksi) for Durus, about 73% more; tensile strength follows at 42 MPa (6.09 ksi) vs 25 MPa (3.63 ksi). In exchange, Durus is the more ductile: elongation 45% versus 32% for Rigur, and Rigur is harder (80 Shore D vs 68 Shore D). Rigur is stiffer (1.9 GPa vs 1.1 GPa) and Durus runs hotter in service (45°C vs 40°C continuous).
DurusChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
RigurChoose it when strength drives the design.
Durus vs Rigur: 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
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Flexural Strength
Flexural Modulus
Izod Impact, Notched
Hardness, Shore D
Hardness, Rockwell R
Compressive Strength
Shear Strength
Fracture Toughness (K_IC)
Hardness, Shore A
Hardness, Rockwell M
Tear Strength
Same in both: Poisson's Ratio 0.4
Physical
Density and transition temperatures.
Glass Transition (Tg)
Water Absorption (24 h)
Same in both: Density 1.17 g/cm³0.04 lb/in³
Thermal
How each material carries heat and how hot it can run.
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Heat Deflection Temp. @ 0.45 MPa
Heat Deflection Temp. @ 1.8 MPa
Vicat Softening Point (B50)
Limiting Oxygen Index
Same in both: Thermal Conductivity 0.2 W/m·K0.12 BTU/hr·ft·°F · Specific Heat Capacity 1,500 J/kg·K0.36 BTU/lb·°F · Min Service Temperature -20°C-4 °F
Electrical
Conductivity and insulation.
Volume Resistivity
Electrical Resistivity
Dielectric Strength
Dielectric Constant (1 MHz)
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Corrosion Resistance 70 / 100 · UV / Weathering Resistance 20 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Polishability
Same in both: Machinability 45 / 100 · Weldability 5 / 100 · Formability (cold) 15 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
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
Same in both: Thermal Diffusivity 0.1 mm²/s · 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 | Durus | Rigur |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Durus vs Rigur — frequently asked
Is Rigur stronger than Durus?
Yes. Rigur has a typical yield strength of 38 MPa (5.51 ksi) against 22 MPa (3.19 ksi) for Durus — about 73% more. Tensile strength is 42 MPa (6.09 ksi) vs 25 MPa (3.63 ksi).
Which is cheaper, Durus or Rigur?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
When should I choose Durus over Rigur?
Pick Durus when the part is bent, formed or impact-loaded, or when the part sees heat. Pick Rigur when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Durus and Rigur 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.