SAC305 (Sn96.5Ag3.0Cu0.5) solder alloy, bulk; Indium Corporation Indalloy 256 (SAC305) for Preforms product data sheet (Form No. 100346 R0, 2024), selected properties, test temperature not stated; expansion and specific heat from MacDermid Alpha VACULOY SAC TDS (06 September 2023).
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 Solder SAC305?
Brass C260 is stronger: its yield strength is 345 MPa against 22 MPa for Solder SAC305 (15.7x).
Which is lighter, Brass C260 or Solder SAC305?
Solder SAC305 is lighter: 7,350 kg/m³ against 8,525 kg/m³ for Brass C260.
Which is stiffer, Brass C260 or Solder SAC305?
Brass C260 is stiffer: Young's modulus 110 GPa against 6.9 GPa for Solder SAC305, so the same part in Brass C260 deflects less under the same load.
Which is lighter for the same job, Brass C260 or Solder SAC305?
For the same stiffness or strength: Brass C260 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
Solder SAC305
Stiff rod or tie (tension)
lighter
13.8x heavier
Stiff beam (bending)
lighter
3.45x heavier
Stiff panel or plate
lighter
2.17x heavier
Strong rod or tie
lighter
13.5x heavier
Strong beam
lighter
5.4x heavier
Strong panel or plate
lighter
3.41x heavier
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 Solder SAC305?
Brass C260 conducts heat better: 121 W/m·K against 61 W/m·K for Solder SAC305.
Which expands less with temperature?
Brass C260 expands less: 20 µm/m·K against 21.9 µm/m·K for Solder SAC305.