Materials / Compare
Brass C260 vs. Plastic Polypropylene
Compare Brass C260 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 | 345MPasourcenominal, strip/flat, 0.5% extension (not 0.2% offset) | 33MPasourcetypical, tensile stress at yield ISO 527 |
| Ultimate tensile strength | 427MPasourcenominal, strip/flat | not sourced |
| Elongation at break | 23%sourcenominal, in 2.0 in., strip/flat | not sourced |
| Young's modulus (stiffness) | 110GPasourcetypical, temper-independent | 1.45GPasourcetypical, tensile modulus ISO 527 |
| Density | 8,525kg/m³sourcenominal | 900kg/m³sourcetypical, 23 °C ISO 1183-1 |
| Strength to weight | 40.5kN·m/kg10% higher | 36.7kN·m/kg |
| Stiffness to weight | 12.9MN·m/kg8.03x higher | 1.61MN·m/kg |
| Poisson's ratio | 0.34sourcereference value at room temperature (Wieland-M30 = CuZn30 = C26000, rolled products) | 0.42sourcebase material: polypropylene homopolymer family (INEOS Olefins & Polymers USA, Typical Engineering Properties of Polypropylene) |
| Shear modulus | 41.2GPa80.6x stiffer in shear | 0.511GPa |
| Bulk modulus | 115GPa | 3.02GPa |
| Speed of sound | 3,597m/s | 1,269m/s |
| Thermal | ||
| Thermal conductivity | 121W/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 | 20µm/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 | 100µm growth4.5x less | 450µm growth |
| Specific heat | 377J/kg·Ksourcetypical, 20 °C | not sourced |
| Heats up and cools (diffusivity) | 37.7mm²/s | not sourced |
| Thermal shock resistance | 12,510W/m437x more resistant | 28.6W/m |
| Melting point | 916–954°Csourcesolidus-liquidus | not sourced |
| Max service temperature | not sourced | 90°CsourceHDT 0.45 MPa (ISO 75B), unannealed |
| Values for | C26000 cartridge brass, H02 half hard flat/strip: CDA Electronic Connector Design Guide (mechanical) + CDA alloy page (physical) | 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 C260 stronger than Plastic Polypropylene?
Brass C260 is stronger: its yield strength is 345 MPa against 33 MPa for Plastic Polypropylene (10.5x).
Which is lighter, Brass C260 or Plastic Polypropylene?
Plastic Polypropylene is lighter: 900 kg/m³ against 8,525 kg/m³ for Brass C260.
Which is stiffer, Brass C260 or Plastic Polypropylene?
Brass C260 is stiffer: Young's modulus 110 GPa against 1.45 GPa for Plastic Polypropylene, so the same part in Brass C260 deflects less under the same load.
Which is lighter for the same job, Brass C260 or Plastic Polypropylene?
For the same stiffness or strength: Brass C260 is lighter for a stiff rod or tie (tension), strong rod or tie; Plastic Polypropylene is lighter for a stiff beam (bending), stiff panel or plate, strong beam, strong panel or plate.
| Part that must be | Brass C260 | Plastic Polypropylene |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 8.03x heavier |
| Stiff beam (bending) | 9% heavier | lighter |
| Stiff panel or plate | 2.24x heavier | lighter |
| Strong rod or tie | lighter | 10% heavier |
| Strong beam | 1.98x heavier | lighter |
| Strong panel or plate | 2.93x 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 Polypropylene?
Brass C260 conducts heat better: 121 W/m·K against 0.195 W/m·K for Plastic Polypropylene.
Which expands less with temperature?
Brass C260 expands less: 20 µm/m·K against 90 µm/m·K for Plastic Polypropylene.