Materials / Compare
Plastic Nylon vs. Plastic PBT GF30
Compare Plastic Nylon vs. Plastic PBT GF30 strength, stiffness, weight and thermal properties.
| Try it on a partA bracket to run stress or thermal on, free in your browser | Open in LessCAD | Open in LessCAD |
|---|---|---|
| Mechanical | ||
| Yield strength | 63.1MPasourcetypical | not given (tensile used) |
| Ultimate tensile strength | 63.1MPasourcetypical, peak stress (= stress at yield) | 140MPasourcestress at break, 23 °C |
| Flexural strength | 82.9MPasourcetypical | 210MPasourcetypical, 23 °C |
| Elongation at break | not sourced | 3%sourcestrain at break, 23 °C |
| Young's modulus (stiffness) | 2.33GPasourcetypical | 9.8GPasourcetypical, 23 °C |
| Density | 1,140kg/m³sourcetypical34% lighter | 1,530kg/m³sourcetypical |
| Strength to weight | 55.4kN·m/kg | 91.5kN·m/kg1.65x higher |
| Stiffness to weight | 2.04MN·m/kg | 6.41MN·m/kg3.13x higher |
| Poisson's ratio | 0.4sourcebase material: unfilled polyamide (PA), conditioned, maker design-guide family value (Covestro Table 3-1) | not sourced |
| Shear modulus | 0.833GPa | not sourced |
| Bulk modulus | 3.89GPa | not sourced |
| Speed of sound | 1,430m/s | 2,531m/s |
| Thermal | ||
| Thermal conductivity | 0.33W/m·Ksourcebase material: unreinforced BASF Ultramid PA66 (A3K) and PA6 (B3S), 23 C (same value for both) | 0.27W/m·Ksourcetypical (DIN 52612-1) |
| Thermal expansion | 98–102µm/m·Ksourcebase material: unreinforced BASF Ultramid PA66 (A3K, 98) and PA6 (B3S, 102), 23-55 C | 25µm/m·Ksourcelongitudinal (flow), mean 23-55 °C |
| 100 mm part over a 50 °C swing | 500µm growth | 125µm growth4x less |
| Specific heat | 1,700J/kg·Ksourcebase material: unreinforced BASF Ultramid PA66 (A3K) and PA6 (B3S), 23 C (same value for both) | 1,050J/kg·Ksourcetypical, 23 °C |
| Heats up and cools (diffusivity) | 0.17mm²/s1% faster | 0.168mm²/s |
| Thermal shock resistance | 53.6W/m | not sourced |
| Melting point | 188°Csourcetypical | 223°CsourceDSC (ISO 11357) |
| Glass transition | 55.1°Csourcetypical | not sourced |
| Max service temperature | 89.2°CsourceHDT 0.455 MPa (printed specimens) | 205°CsourceHDT 1.8 MPa |
| Values for | Ultimaker Nylon, 3D-printed specimens, XY (flat), conditioned >=24 h at room temperature; Ultimaker S5 Pro, engineering intent profile, 0.15 mm layer height, AA 0.4 print core, 100% infill, Cura 4.9, printed one-at-a-time, conditioned >=24 h at room temperature. TDS v2.00, April 20, 2022. | BASF Ultradur B 4300 G6 (PBT, 30% glass fibre), injection moulding grade; product information sheet 09/2026, typical values for uncoloured product at 23 °C. |
Every value links to the document that states it. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.
Plastic Nylon is 3D printed: its properties depend on build direction and print settings; these are typical values.
Questions
Is Plastic Nylon stronger than Plastic PBT GF30?
Plastic PBT GF30 is stronger: its tensile strength is 140 MPa against yield strength 63.1 MPa for Plastic Nylon (2.22x).
Which is lighter, Plastic Nylon or Plastic PBT GF30?
Plastic Nylon is lighter: 1,140 kg/m³ against 1,530 kg/m³ for Plastic PBT GF30.
Which is stiffer, Plastic Nylon or Plastic PBT GF30?
Plastic PBT GF30 is stiffer: Young's modulus 9.8 GPa against 2.33 GPa for Plastic Nylon, so the same part in Plastic PBT GF30 deflects less under the same load.
Which is lighter for the same job, Plastic Nylon or Plastic PBT GF30?
For the same stiffness or strength: Plastic PBT GF30 is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam, strong panel or plate.
| Part that must be | Plastic Nylon | Plastic PBT GF30 |
|---|---|---|
| Stiff rod or tie (tension) | 3.13x heavier | lighter |
| Stiff beam (bending) | 1.53x heavier | lighter |
| Stiff panel or plate | 20% heavier | lighter |
| Strong rod or tie | 1.65x heavier | lighter |
| Strong beam | 27% heavier | lighter |
| Strong panel or plate | 11% heavier | lighter |
For the same stiffness or strength, mass scales with density over stiffness (or strength) raised to a power set by how the part is loaded: 1 for a rod in tension, 1/2 for a beam in bending, 1/3 for a panel (the standard material-selection indices).
Which conducts heat better, Plastic Nylon or Plastic PBT GF30?
Plastic Nylon conducts heat better: 0.33 W/m·K against 0.27 W/m·K for Plastic PBT GF30.
Which expands less with temperature?
Plastic PBT GF30 expands less: 25 µm/m·K against 100 µm/m·K for Plastic Nylon.