Materials / Compare
Brass C260 vs. Plastic PETG
Compare Brass C260 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 | 345MPasourcenominal, strip/flat, 0.5% extension (not 0.2% offset) | 46.2MPasourcetypical |
| Ultimate tensile strength | 427MPasourcenominal, strip/flat | 46.2MPasourcetypical, peak stress (= stress at yield) |
| Flexural strength | not sourced | 78.9MPasourcetypical |
| Elongation at break | 23%sourcenominal, in 2.0 in., strip/flat | 7.6%sourcetypical |
| Young's modulus (stiffness) | 110GPasourcetypical, temper-independent | 1.94GPasourcetypical |
| Density | 8,525kg/m³sourcenominal | 1,270kg/m³sourcetypical |
| Strength to weight | 40.5kN·m/kg11% higher | 36.4kN·m/kg |
| Stiffness to weight | 12.9MN·m/kg8.47x higher | 1.53MN·m/kg |
| Poisson's ratio | 0.34sourcereference value at room temperature (Wieland-M30 = CuZn30 = C26000, rolled products) | not sourced |
| Shear modulus | 41.2GPa | not sourced |
| Bulk modulus | 115GPa | not sourced |
| Speed of sound | 3,597m/s | 1,236m/s |
| Thermal | ||
| Thermal conductivity | 121W/m·Ksourcetypical, 20 °C | 0.21W/m·Ksourcebase material: Eastman Eastar Copolyester 6763 (PETG), typical |
| Thermal expansion | 20µm/m·Ksourcetypical, mean 20-300 °C | 51µm/m·Ksourcebase material: Eastman Eastar Copolyester 6763 (PETG), typical |
| 100 mm part over a 50 °C swing | 100µm growth2.55x 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) | 37.7mm²/s297x faster | 0.127mm²/s |
| Thermal shock resistance | 12,510W/m | not sourced |
| Melting point | 916–954°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 | C26000 cartridge brass, H02 half hard flat/strip: CDA Electronic Connector Design Guide (mechanical) + CDA alloy page (physical) | 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 C260 stronger than Plastic PETG?
Brass C260 is stronger: its yield strength is 345 MPa against 46.2 MPa for Plastic PETG (7.47x).
Which is lighter, Brass C260 or Plastic PETG?
Plastic PETG is lighter: 1,270 kg/m³ against 8,525 kg/m³ for Brass C260.
Which is stiffer, Brass C260 or Plastic PETG?
Brass C260 is stiffer: Young's modulus 110 GPa against 1.94 GPa for Plastic PETG, so the same part in Brass C260 deflects less under the same load.
Which is lighter for the same job, Brass C260 or Plastic PETG?
For the same stiffness or strength: Brass C260 is lighter for a stiff rod or tie (tension), stiff beam (bending), strong rod or tie; Plastic PETG is lighter for a stiff panel or plate, strong beam, strong panel or plate.
| Part that must be | Brass C260 | Plastic PETG |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 8.47x heavier |
| Stiff beam (bending) | lighter | 12% heavier |
| Stiff panel or plate | 1.75x heavier | lighter |
| Strong rod or tie | lighter | 11% heavier |
| Strong beam | 1.76x heavier | lighter |
| Strong panel or plate | 2.46x 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 C260 or Plastic PETG?
Brass C260 conducts heat better: 121 W/m·K against 0.21 W/m·K for Plastic PETG.
Which expands less with temperature?
Brass C260 expands less: 20 µm/m·K against 51 µm/m·K for Plastic PETG.