Materials / Compare
Plastic Nylon vs. Plastic POM/Acetal
Compare Plastic Nylon vs. Plastic POM/Acetal 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 | 69MPasourcetypical (single ASTM D638 tensile strength) |
| Ultimate tensile strength | 63.1MPasourcetypical, peak stress (= stress at yield) | 69MPasourcetypical |
| Compressive strength | not sourced | 124MPasourcecompressive stress at 10% deformation |
| Flexural strength | 82.9MPasourcetypical | 99MPasourceflexural yield strength, typical |
| Elongation at break | not sourced | 75%sourcetypical |
| Young's modulus (stiffness) | 2.33GPasourcetypical | 2.8GPasourcetypical20% stiffer |
| Density | 1,140kg/m³sourcetypical | 1,420kg/m³sourcetypical (DuPont product information for Delrin 100 NC010; 'The data listed here fall within the normal range of product properties') |
| Strength to weight | 55.4kN·m/kg14% higher | 48.6kN·m/kg |
| Stiffness to weight | 2.04MN·m/kg4% higher | 1.97MN·m/kg |
| Poisson's ratio | 0.4sourcebase material: unfilled polyamide (PA), conditioned, maker design-guide family value (Covestro Table 3-1) | 0.35sourcetypical |
| Shear modulus | 0.833GPa | 1.04GPa25% stiffer in shear |
| Bulk modulus | 3.89GPa | 3.11GPa |
| Speed of sound | 1,430m/s | 1,404m/s |
| Thermal | ||
| Thermal conductivity | 0.33W/m·Ksourcebase material: unreinforced BASF Ultramid PA66 (A3K) and PA6 (B3S), 23 C (same value for both) | 0.4W/m·Ksourcetypical |
| Thermal expansion | 98–102µm/m·Ksourcebase material: unreinforced BASF Ultramid PA66 (A3K, 98) and PA6 (B3S, 102), 23-55 C | 122µm/m·Ksourcemean, 29 to 60 °C |
| 100 mm part over a 50 °C swing | 500µm growth22% less | 610µm growth |
| Specific heat | 1,700J/kg·Ksourcebase material: unreinforced BASF Ultramid PA66 (A3K) and PA6 (B3S), 23 C (same value for both) | 1,465J/kg·Ksourceaverage -18 to 100 °C, Delrin acetal resins (not grade-specific) |
| Heats up and cools (diffusivity) | 0.17mm²/s | 0.192mm²/s13% faster |
| Thermal shock resistance | 53.6W/m2% more resistant | 52.5W/m |
| Melting point | 188°Csourcetypical | 175°Csourcecrystalline melting point |
| Glass transition | 55.1°Csourcetypical | not sourced |
| Max service temperature | 89.2°CsourceHDT 0.455 MPa (printed specimens) | 125°CsourceHDT 1.8 MPa (annealed) |
| 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. | DuPont Delrin 100 acetal homopolymer, Table 2 'Typical Properties of Delrin Acetal Resins' (ASTM methods), Delrin Design Guide Module III hosted on delrin.com |
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 POM/Acetal?
Plastic POM/Acetal is stronger: its yield strength is 69 MPa against 63.1 MPa for Plastic Nylon (9%).
Which is lighter, Plastic Nylon or Plastic POM/Acetal?
Plastic Nylon is lighter: 1,140 kg/m³ against 1,420 kg/m³ for Plastic POM/Acetal.
Which is stiffer, Plastic Nylon or Plastic POM/Acetal?
Plastic POM/Acetal is stiffer: Young's modulus 2.8 GPa against 2.33 GPa for Plastic Nylon, so the same part in Plastic POM/Acetal deflects less under the same load.
Which is lighter for the same job, Plastic Nylon or Plastic POM/Acetal?
For the same stiffness or strength: Plastic Nylon 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 POM/Acetal |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 4% heavier |
| Stiff beam (bending) | lighter | 14% heavier |
| Stiff panel or plate | lighter | 17% heavier |
| Strong rod or tie | lighter | 14% heavier |
| Strong beam | lighter | 17% heavier |
| Strong panel or plate | lighter | 19% heavier |
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 POM/Acetal?
Plastic POM/Acetal conducts heat better: 0.4 W/m·K against 0.33 W/m·K for Plastic Nylon.
Which expands less with temperature?
Plastic Nylon expands less: 100 µm/m·K against 122 µm/m·K for Plastic POM/Acetal.
Among 59 materials
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