LyondellBasell Hostalen 23050 B high density polyethylene, typical ISO values
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 Plastic HDPE stronger than Solder SAC305?
Plastic HDPE is stronger: its yield strength is 24 MPa against 22 MPa for Solder SAC305 (9%).
Which is lighter, Plastic HDPE or Solder SAC305?
Plastic HDPE is lighter: 950 kg/m³ against 7,350 kg/m³ for Solder SAC305.
Which is stiffer, Plastic HDPE or Solder SAC305?
Solder SAC305 is stiffer: Young's modulus 6.9 GPa against 0.9 GPa for Plastic HDPE, so the same part in Solder SAC305 deflects less under the same load.
Which is lighter for the same job, Plastic HDPE or Solder SAC305?
For the same stiffness or strength: Plastic HDPE is lighter for a stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam, strong panel or plate.
Part that must be
Plastic HDPE
Solder SAC305
Stiff rod or tie (tension)
about equal
about equal
Stiff beam (bending)
lighter
2.79x heavier
Stiff panel or plate
lighter
3.92x heavier
Strong rod or tie
lighter
8.44x heavier
Strong beam
lighter
8.2x heavier
Strong panel or plate
lighter
8.08x 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, Plastic HDPE or Solder SAC305?
Solder SAC305 conducts heat better: 61 W/m·K against 0.445 W/m·K for Plastic HDPE.
Which expands less with temperature?
Solder SAC305 expands less: 21.9 µm/m·K against 120 µm/m·K for Plastic HDPE.