Materials / Compare
Plastic ABS (bulk/injection) vs. Brass C260
Compare Plastic ABS (bulk/injection) vs. Brass C260 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 | 45MPasourcetypical, tensile stress at yield 23 °C | 345MPasourcenominal, strip/flat, 0.5% extension (not 0.2% offset) |
| Ultimate tensile strength | not sourced | 427MPasourcenominal, strip/flat |
| Flexural strength | 65MPasourcetypical, 23 °C | not sourced |
| Elongation at break | 10%sourcenominal strain at break, 23 °C | 23%sourcenominal, in 2.0 in., strip/flat |
| Young's modulus (stiffness) | 2.3GPasourcetypical | 110GPasourcetypical, temper-independent |
| Density | 1,040kg/m³sourcetypical | 8,525kg/m³sourcenominal |
| Strength to weight | 43.3kN·m/kg7% higher | 40.5kN·m/kg |
| Stiffness to weight | 2.21MN·m/kg | 12.9MN·m/kg5.85x higher |
| Poisson's ratio | 0.39sourcetypical, ABS family (Covestro Part and Mold Design guide, Table 3-1) | 0.34sourcereference value at room temperature (Wieland-M30 = CuZn30 = C26000, rolled products) |
| Shear modulus | 0.827GPa | 41.2GPa49.7x stiffer in shear |
| Bulk modulus | 3.48GPa | 115GPa |
| Speed of sound | 1,487m/s | 3,597m/s |
| Thermal | ||
| Thermal conductivity | 0.17W/m·Ksourcetypical | 121W/m·Ksourcetypical, 20 °C |
| Thermal expansion | 80–110µm/m·Ksourcerange | 20µm/m·Ksourcetypical, mean 20-300 °C |
| 100 mm part over a 50 °C swing | 475µm growth | 100µm growth4.75x less |
| Specific heat | not sourced | 377J/kg·Ksourcetypical, 20 °C |
| Heats up and cools (diffusivity) | not sourced | 37.7mm²/s |
| Thermal shock resistance | 21.4W/m | 12,510W/m586x more resistant |
| Melting point | not sourced | 916–954°Csourcesolidus-liquidus |
| Max service temperature | 94°CsourceHDT 1.8 MPa (annealed 4 h/80 °C) | not sourced |
| Values for | INEOS Styrolution Terluran GP-22 general-purpose injection-molding ABS, ISO typical values (TDS revision 08/01/2022) | C26000 cartridge brass, H02 half hard flat/strip: CDA Electronic Connector Design Guide (mechanical) + CDA alloy page (physical) |
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.
Questions
Is Plastic ABS (bulk/injection) stronger than Brass C260?
Brass C260 is stronger: its yield strength is 345 MPa against 45 MPa for Plastic ABS (bulk/injection) (7.67x).
Which is lighter, Plastic ABS (bulk/injection) or Brass C260?
Plastic ABS (bulk/injection) is lighter: 1,040 kg/m³ against 8,525 kg/m³ for Brass C260.
Which is stiffer, Plastic ABS (bulk/injection) or Brass C260?
Brass C260 is stiffer: Young's modulus 110 GPa against 2.3 GPa for Plastic ABS (bulk/injection), so the same part in Brass C260 deflects less under the same load.
Which is lighter for the same job, Plastic ABS (bulk/injection) or Brass C260?
For the same stiffness or strength: Plastic ABS (bulk/injection) is lighter for a stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam, strong panel or plate; Brass C260 is lighter for a stiff rod or tie (tension).
| Part that must be | Plastic ABS (bulk/injection) | Brass C260 |
|---|---|---|
| Stiff rod or tie (tension) | 5.85x heavier | lighter |
| Stiff beam (bending) | lighter | 18% heavier |
| Stiff panel or plate | lighter | 2.26x heavier |
| Strong rod or tie | lighter | 7% heavier |
| Strong beam | lighter | 2.11x heavier |
| Strong panel or plate | lighter | 2.96x 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 ABS (bulk/injection) or Brass C260?
Brass C260 conducts heat better: 121 W/m·K against 0.17 W/m·K for Plastic ABS (bulk/injection).
Which expands less with temperature?
Brass C260 expands less: 20 µm/m·K against 95 µm/m·K for Plastic ABS (bulk/injection).