Materials / Compare
Brass C360 vs. Plastic UHMWPE
Compare Brass C360 vs. Plastic UHMWPE 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 | 20MPasourcetypical, tensile stress at yield ISO 527, 50 mm/min |
| Ultimate tensile strength | 400MPasourcetypical | 43MPasourcetypical, tensile stress at break ISO 527, 50 mm/min |
| Elongation at break | 25%sourcetypical, 1 in. rod | 465%sourcetypical, nominal elongation at break ISO 527 |
| Young's modulus (stiffness) | 96.5GPasourcetypical, temper-independent | 0.66GPasourcetypical, tensile modulus ISO 527, 1 mm/min |
| Density | 8,498kg/m³sourcenominal | 930kg/m³sourcetypical |
| Strength to weight | 36.5kN·m/kg1.7x higher | 21.5kN·m/kg |
| Stiffness to weight | 11.4MN·m/kg16x higher | 0.71MN·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 | 842m/s |
| Thermal | ||
| Thermal conductivity | 116W/m·Ksourcetypical, 20 °C | 0.4W/m·Ksourcetypical, unfilled (narrative value, generic Celanese UHMWPE) |
| Thermal expansion | 20.5µm/m·Ksourcetypical, mean 20-300 °C | 200µm/m·Ksourcetypical, 20 to 100 °C (generic Celanese UHMWPE) |
| 100 mm part over a 50 °C swing | 103µm growth9.76x less | 1,000µm growth |
| Specific heat | 377J/kg·Ksourcetypical, 20 °C | not sourced |
| Heats up and cools (diffusivity) | 36.2mm²/s | not sourced |
| Thermal shock resistance | 11,997W/m | not sourced |
| Melting point | 888–899°Csourcesolidus-liquidus | 130–138°CsourceDSC 10 K/min |
| Max service temperature | not sourced | 80°Csourcerecommended max constant operating temperature |
| Values for | C36000 free-cutting brass, H02 half-hard rod 1 in. section (20% cold work), copper.org typical values | Celanese GUR 4120 (avg. molecular weight 4.7x10^6 g/mol), typical values on compression-molded specimens; CTE and thermal conductivity from Celanese's generic UHMWPE guide (grade not named) |
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 Brass C360 stronger than Plastic UHMWPE?
Brass C360 is stronger: its yield strength is 310 MPa against 20 MPa for Plastic UHMWPE (15.5x).
Which is lighter, Brass C360 or Plastic UHMWPE?
Plastic UHMWPE is lighter: 930 kg/m³ against 8,498 kg/m³ for Brass C360.
Which is stiffer, Brass C360 or Plastic UHMWPE?
Brass C360 is stiffer: Young's modulus 96.5 GPa against 0.66 GPa for Plastic UHMWPE, so the same part in Brass C360 deflects less under the same load.
Which is lighter for the same job, Brass C360 or Plastic UHMWPE?
For the same stiffness or strength: Brass C360 is lighter for a stiff rod or tie (tension), stiff beam (bending), strong rod or tie; Plastic UHMWPE is lighter for a stiff panel or plate, strong beam, strong panel or plate.
| Part that must be | Brass C360 | Plastic UHMWPE |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 16x heavier |
| Stiff beam (bending) | lighter | 32% heavier |
| Stiff panel or plate | 1.73x heavier | lighter |
| Strong rod or tie | lighter | 1.7x heavier |
| Strong beam | 47% heavier | lighter |
| Strong panel or plate | 2.32x 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 UHMWPE?
Brass C360 conducts heat better: 116 W/m·K against 0.4 W/m·K for Plastic UHMWPE.
Which expands less with temperature?
Brass C360 expands less: 20.5 µm/m·K against 200 µm/m·K for Plastic UHMWPE.