LyondellBasell Moplen HP501H polypropylene homopolymer (general purpose), 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 Polypropylene stronger than Solder SAC305?
Plastic Polypropylene is stronger: its yield strength is 33 MPa against 22 MPa for Solder SAC305 (1.5x).
Which is lighter, Plastic Polypropylene or Solder SAC305?
Plastic Polypropylene is lighter: 900 kg/m³ against 7,350 kg/m³ for Solder SAC305.
Which is stiffer, Plastic Polypropylene or Solder SAC305?
Solder SAC305 is stiffer: Young's modulus 6.9 GPa against 1.45 GPa for Plastic Polypropylene, so the same part in Solder SAC305 deflects less under the same load.
Which is lighter for the same job, Plastic Polypropylene or Solder SAC305?
For the same stiffness or strength: Plastic Polypropylene 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
Plastic Polypropylene
Solder SAC305
Stiff rod or tie (tension)
lighter
1.72x heavier
Stiff beam (bending)
lighter
3.74x heavier
Stiff panel or plate
lighter
4.86x heavier
Strong rod or tie
lighter
12.2x heavier
Strong beam
lighter
10.7x heavier
Strong panel or plate
lighter
10x 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 Polypropylene or Solder SAC305?
Solder SAC305 conducts heat better: 61 W/m·K against 0.195 W/m·K for Plastic Polypropylene.
Which expands less with temperature?
Solder SAC305 expands less: 21.9 µm/m·K against 90 µm/m·K for Plastic Polypropylene.