Materials / Compare
Brass C360 vs. Plastic PETG
Compare Brass C360 vs. Plastic PETG 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 | 310MPasourcetypical, 0.5% extension under load | 46.2MPasourcetypical |
| Ultimate tensile strength | 400MPasourcetypical | 46.2MPasourcetypical, peak stress (= stress at yield) |
| Flexural strength | not sourced | 78.9MPasourcetypical |
| Elongation at break | 25%sourcetypical, 1 in. rod | 7.6%sourcetypical |
| Young's modulus (stiffness) | 96.5GPasourcetypical, temper-independent | 1.94GPasourcetypical |
| Density | 8,498kg/m³sourcenominal | 1,270kg/m³sourcetypical |
| Strength to weight | 36.5kN·m/kg | 36.4kN·m/kg |
| Stiffness to weight | 11.4MN·m/kg7.44x higher | 1.53MN·m/kg |
| Poisson's ratio | 0.34sourcebase material: leaded free-machining brass CuZn39Pb2 (C37700), Wieland-Z30 rolled products, reference value at room temperature | not sourced |
| Shear modulus | 36GPa | not sourced |
| Bulk modulus | 101GPa | not sourced |
| Speed of sound | 3,370m/s | 1,236m/s |
| Thermal | ||
| Thermal conductivity | 116W/m·Ksourcetypical, 20 °C | 0.21W/m·Ksourcebase material: Eastman Eastar Copolyester 6763 (PETG), typical |
| Thermal expansion | 20.5µm/m·Ksourcetypical, mean 20-300 °C | 51µm/m·Ksourcebase material: Eastman Eastar Copolyester 6763 (PETG), typical |
| 100 mm part over a 50 °C swing | 103µm growth2.49x less | 255µm growth |
| Specific heat | 377J/kg·Ksourcetypical, 20 °C | 1,300J/kg·Ksourcebase material: Eastman Eastar Copolyester 6763 (PETG), DSC at 60 °C (lowest temperature listed) |
| Heats up and cools (diffusivity) | 36.2mm²/s285x faster | 0.127mm²/s |
| Thermal shock resistance | 11,997W/m | not sourced |
| Melting point | 888–899°Csourcesolidus-liquidus | not sourced |
| Glass transition | not sourced | 77.4°Csourcetypical |
| Max service temperature | not sourced | 76.2°CsourceHDT 0.455 MPa (printed specimens) |
| Values for | C36000 free-cutting brass, H02 half-hard rod 1 in. section (20% cold work), copper.org typical values | Ultimaker PETG, 3D-printed specimens, XY (flat); 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 v1.00, April 29, 2022. |
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 PETG is 3D printed: its properties depend on build direction and print settings; these are typical values.
Questions
Is Brass C360 stronger than Plastic PETG?
Brass C360 is stronger: its yield strength is 310 MPa against 46.2 MPa for Plastic PETG (6.71x).
Which is lighter, Brass C360 or Plastic PETG?
Plastic PETG is lighter: 1,270 kg/m³ against 8,498 kg/m³ for Brass C360.
Which is stiffer, Brass C360 or Plastic PETG?
Brass C360 is stiffer: Young's modulus 96.5 GPa against 1.94 GPa for Plastic PETG, so the same part in Brass C360 deflects less under the same load.
Which is lighter for the same job, Brass C360 or Plastic PETG?
For the same stiffness or strength: Brass C360 is lighter for a stiff rod or tie (tension), stiff beam (bending); Plastic PETG is lighter for a stiff panel or plate, strong beam, strong panel or plate.
| Part that must be | Brass C360 | Plastic PETG |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 7.44x heavier |
| Stiff beam (bending) | lighter | 5% heavier |
| Stiff panel or plate | 1.82x heavier | lighter |
| Strong rod or tie | about equal | about equal |
| Strong beam | 1.88x heavier | lighter |
| Strong panel or plate | 2.58x 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, Brass C360 or Plastic PETG?
Brass C360 conducts heat better: 116 W/m·K against 0.21 W/m·K for Plastic PETG.
Which expands less with temperature?
Brass C360 expands less: 20.5 µm/m·K against 51 µm/m·K for Plastic PETG.