Materials / Compare
Copper C110 vs. Stainless 303
Compare Copper C110 vs. Stainless 303 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 | 69MPasourcetypical, 0.5% extension under load | 275MPasourceOutokumpu typical (product P = hot rolled plate, transverse) |
| Ultimate tensile strength | 221MPasourcetypical | 585MPasourceOutokumpu typical |
| Elongation at break | 55%sourcetypical, 1 in. rod | 35%sourceOutokumpu typical, A5 |
| Young's modulus (stiffness) | 117GPasourcetypical | 200GPasourceat RT (Table 12) |
| Density | 8,913kg/m³sourcenominal | 7,900kg/m³sourceat RT |
| Strength to weight | 7.74kN·m/kg | 34.8kN·m/kg4.5x higher |
| Stiffness to weight | 13.1MN·m/kg | 25.3MN·m/kg1.93x higher |
| Poisson's ratio | 0.34sourcereference value at room temperature (Wieland-K32 = Cu-ETP = C11000, rolled products) | 0.3sourcedesign value (structural stainless steels) |
| Shear modulus | 43.7GPa | 76.9GPa1.76x stiffer in shear |
| Bulk modulus | 122GPa | 167GPa |
| Speed of sound | 3,626m/s | 5,032m/s |
| Thermal | ||
| Thermal conductivity | 391W/m·Ksourcetypical, 20 °C | 15W/m·Ksourceat RT |
| Thermal expansion | 16.9µm/m·Ksourcetypical, mean 20-100 °C | 16µm/m·Ksourcemean, 20–100 °C |
| 100 mm part over a 50 °C swing | 84.5µm growth | 80µm growth6% less |
| Specific heat | 385J/kg·Ksourcetypical, 20 °C | 500J/kg·Ksourceat RT |
| Heats up and cools (diffusivity) | 114mm²/s30x faster | 3.8mm²/s |
| Thermal shock resistance | 8,992W/m9.97x more resistant | 902W/m |
| Melting point | 1,065–1,083°Csourcesolidus-liquidus | not sourced |
| Max service temperature | not sourced | 871°Csourcecontinuous, scaling limit |
| Values for | C11000 ETP copper, annealed to 0.050 mm grain size (OS050), 1 in. rod, copper.org typical values | 1.4305 / UNS S30300, Outokumpu typical values (hot rolled, solution annealed) from 'Steel Grades, Properties and Global Standards'; max service from Carpenter CarTech 303 datasheet |
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 Copper C110 stronger than Stainless 303?
Stainless 303 is stronger: its yield strength is 275 MPa against 69 MPa for Copper C110 (3.99x).
Which is lighter, Copper C110 or Stainless 303?
Stainless 303 is lighter: 7,900 kg/m³ against 8,913 kg/m³ for Copper C110.
Which is stiffer, Copper C110 or Stainless 303?
Stainless 303 is stiffer: Young's modulus 200 GPa against 117 GPa for Copper C110, so the same part in Stainless 303 deflects less under the same load.
Which is lighter for the same job, Copper C110 or Stainless 303?
For the same stiffness or strength: Stainless 303 is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam, strong panel or plate.
| Part that must be | Copper C110 | Stainless 303 |
|---|---|---|
| Stiff rod or tie (tension) | 1.93x heavier | lighter |
| Stiff beam (bending) | 47% heavier | lighter |
| Stiff panel or plate | 35% heavier | lighter |
| Strong rod or tie | 4.5x heavier | lighter |
| Strong beam | 2.84x heavier | lighter |
| Strong panel or plate | 2.25x 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, Copper C110 or Stainless 303?
Copper C110 conducts heat better: 391 W/m·K against 15 W/m·K for Stainless 303.
Which expands less with temperature?
Stainless 303 expands less: 16 µm/m·K against 16.9 µm/m·K for Copper C110.