Materials / Compare
Brass C360 vs. Plastic Polypropylene
Compare Brass C360 vs. Plastic Polypropylene 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 | 33MPasourcetypical, tensile stress at yield ISO 527 |
| Ultimate tensile strength | 400MPasourcetypical | not sourced |
| Elongation at break | 25%sourcetypical, 1 in. rod | not sourced |
| Young's modulus (stiffness) | 96.5GPasourcetypical, temper-independent | 1.45GPasourcetypical, tensile modulus ISO 527 |
| Density | 8,498kg/m³sourcenominal | 900kg/m³sourcetypical, 23 °C ISO 1183-1 |
| Strength to weight | 36.5kN·m/kg | 36.7kN·m/kg |
| Stiffness to weight | 11.4MN·m/kg7.05x higher | 1.61MN·m/kg |
| Poisson's ratio | 0.34sourcebase material: leaded free-machining brass CuZn39Pb2 (C37700), Wieland-Z30 rolled products, reference value at room temperature | 0.42sourcebase material: polypropylene homopolymer family (INEOS Olefins & Polymers USA, Typical Engineering Properties of Polypropylene) |
| Shear modulus | 36GPa70.5x stiffer in shear | 0.511GPa |
| Bulk modulus | 101GPa | 3.02GPa |
| Speed of sound | 3,370m/s | 1,269m/s |
| Thermal | ||
| Thermal conductivity | 116W/m·Ksourcetypical, 20 °C | 0.17–0.22W/m·Ksourcebase material: polypropylene homopolymer family (INEOS Olefins & Polymers USA, Typical Engineering Properties of Polypropylene) |
| Thermal expansion | 20.5µm/m·Ksourcetypical, mean 20-300 °C | 80–100µm/m·Ksourcebase material: polypropylene homopolymer family (INEOS Olefins & Polymers USA, Typical Engineering Properties of Polypropylene) |
| 100 mm part over a 50 °C swing | 103µm growth4.39x less | 450µm 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/m419x more resistant | 28.6W/m |
| Melting point | 888–899°Csourcesolidus-liquidus | not sourced |
| Max service temperature | not sourced | 90°CsourceHDT 0.45 MPa (ISO 75B), unannealed |
| Values for | C36000 free-cutting brass, H02 half-hard rod 1 in. section (20% cold work), copper.org typical values | LyondellBasell Moplen HP501H polypropylene homopolymer (general purpose), typical ISO values |
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 Polypropylene?
Brass C360 is stronger: its yield strength is 310 MPa against 33 MPa for Plastic Polypropylene (9.39x).
Which is lighter, Brass C360 or Plastic Polypropylene?
Plastic Polypropylene is lighter: 900 kg/m³ against 8,498 kg/m³ for Brass C360.
Which is stiffer, Brass C360 or Plastic Polypropylene?
Brass C360 is stiffer: Young's modulus 96.5 GPa against 1.45 GPa for Plastic Polypropylene, so the same part in Brass C360 deflects less under the same load.
Which is lighter for the same job, Brass C360 or Plastic Polypropylene?
For the same stiffness or strength: Brass C360 is lighter for a stiff rod or tie (tension); Plastic Polypropylene is lighter for a stiff beam (bending), stiff panel or plate, strong beam, strong panel or plate.
| Part that must be | Brass C360 | Plastic Polypropylene |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 7.05x heavier |
| Stiff beam (bending) | 16% heavier | lighter |
| Stiff panel or plate | 2.33x heavier | lighter |
| Strong rod or tie | about equal | about equal |
| Strong beam | 2.12x heavier | lighter |
| Strong panel or plate | 3.08x 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 Polypropylene?
Brass C360 conducts heat better: 116 W/m·K against 0.195 W/m·K for Plastic Polypropylene.
Which expands less with temperature?
Brass C360 expands less: 20.5 µm/m·K against 90 µm/m·K for Plastic Polypropylene.