Materials / Compare
Brass C260 vs. Stainless 17-4PH
Compare Brass C260 vs. Stainless 17-4PH 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) | 1,275MPasourcetypical, transverse, sheet/strip |
| Ultimate tensile strength | 427MPasourcenominal, strip/flat | 1,379MPasourcetypical, transverse, sheet/strip |
| Elongation at break | 23%sourcenominal, in 2.0 in., strip/flat | 9%sourcetypical, transverse, in 2 in. (50.8 mm) |
| Young's modulus (stiffness) | 110GPasourcetypical, temper-independent | 197GPasourceH 900 |
| Density | 8,525kg/m³sourcenominal | 7,800kg/m³sourceH 900 |
| Strength to weight | 40.5kN·m/kg | 163kN·m/kg4.04x higher |
| Stiffness to weight | 12.9MN·m/kg | 25.3MN·m/kg1.95x higher |
| Poisson's ratio | 0.34sourcereference value at room temperature (Wieland-M30 = CuZn30 = C26000, rolled products) | 0.272sourceH 900 (column) |
| Shear modulus | 41.2GPa | 77.4GPa1.88x stiffer in shear |
| Bulk modulus | 115GPa | 144GPa |
| Speed of sound | 3,597m/s | 5,026m/s |
| Thermal | ||
| Thermal conductivity | 121W/m·Ksourcetypical, 20 °C | 17.9W/m·Ksourceat 149 °C (300 °F), H 900 |
| Thermal expansion | 20µm/m·Ksourcetypical, mean 20-300 °C | 10.8µm/m·Ksourcemean, 21–93 °C (70–200 °F), H 900 |
| 100 mm part over a 50 °C swing | 100µm growth | 54µm growth1.85x less |
| Specific heat | 377J/kg·Ksourcetypical, 20 °C | 460J/kg·Ksourcemean, 0–100 °C, H 900 |
| Heats up and cools (diffusivity) | 37.7mm²/s7.56x faster | 4.99mm²/s |
| Thermal shock resistance | 12,510W/m1.6x more resistant | 7,809W/m |
| Melting point | 916–954°Csourcesolidus-liquidus | not sourced |
| Max service temperature | not sourced | 316°Csourcestrength-retention limit (not oxidation) |
| Values for | C26000 cartridge brass, H02 half hard flat/strip: CDA Electronic Connector Design Guide (mechanical) + CDA alloy page (physical) | Cleveland-Cliffs 17-4 PH, Condition H 900, sheet/strip, transverse (Product Data Bulletin, May 2021) |
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 Stainless 17-4PH?
Stainless 17-4PH is stronger: its yield strength is 1,275 MPa against 345 MPa for Brass C260 (3.7x).
Which is lighter, Brass C260 or Stainless 17-4PH?
Stainless 17-4PH is lighter: 7,800 kg/m³ against 8,525 kg/m³ for Brass C260.
Which is stiffer, Brass C260 or Stainless 17-4PH?
Stainless 17-4PH is stiffer: Young's modulus 197 GPa against 110 GPa for Brass C260, so the same part in Stainless 17-4PH deflects less under the same load.
Which is lighter for the same job, Brass C260 or Stainless 17-4PH?
For the same stiffness or strength: Stainless 17-4PH 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 | Brass C260 | Stainless 17-4PH |
|---|---|---|
| Stiff rod or tie (tension) | 1.95x heavier | lighter |
| Stiff beam (bending) | 46% heavier | lighter |
| Stiff panel or plate | 33% heavier | lighter |
| Strong rod or tie | 4.04x heavier | lighter |
| Strong beam | 2.61x heavier | lighter |
| Strong panel or plate | 2.1x 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 Stainless 17-4PH?
Brass C260 conducts heat better: 121 W/m·K against 17.9 W/m·K for Stainless 17-4PH.
Which expands less with temperature?
Stainless 17-4PH expands less: 10.8 µm/m·K against 20 µm/m·K for Brass C260.