Thermal conductivity against densityHigher and further left: spreads more heat for its weightThermal expansion against thermal conductivityLower and further right: warps less when heated
Try it on a partA bracket to run stress or thermal on, free in your browser
Chemours Teflon PTFE 7C X granular molding resin, typical values (tensile/elongation measured on 0.13 mm skived tape)
Solder SAC305
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).
1
Teflon PTFE Fluoropolymer Resin Properties HandbookChemoursarchived copyPlastic PTFE · Yield strength: typical yield strength at 23 °C (Teflon PTFE, Table 8)Plastic PTFE · Poisson's ratio: typical, 23 °C (Teflon PTFE resins, Chemours handbook)Plastic PTFE · Thermal conductivity: typical, granular resin, 4.6 mm specimenPlastic PTFE · Thermal expansion: typical, granular resin, 23-60 °C (ASTM E228)Plastic PTFE · Specific heat: typical, granular resin, 20 °C (ASTM D4591)
2
Indalloy 256 (SAC305) for Preforms Product Data Sheet (100346 R0)Indium Corporationarchived copySolder SAC305 · Yield strength: typicalSolder SAC305 · Ultimate tensile strength: typicalSolder SAC305 · Elongation at break: typicalSolder SAC305 · Young's modulus (stiffness): typical, temperature and strain rate not statedSolder SAC305 · Density: typicalSolder SAC305 · Poisson's ratio: typicalSolder SAC305 · Thermal conductivity: typical, temperature not statedSolder SAC305 · Melting point: solidus-liquidus
ALPHA Vaculoy SAC Alloys Technical Data Sheet (2023)MacDermid AlphaSolder SAC305 · Thermal expansion: mean, 20-100 °C (MacDermid Alpha)Solder SAC305 · Specific heat: typical (MacDermid Alpha)
5
Teflon PTFE 6C X Product InformationChemoursarchived copyPlastic PTFE · Max service temperature: service temperature (Chemours general Teflon PTFE statement)
Each number points to the document that states it, with the exact basis. Values without a number are computed from the sourced ones. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.
Questions
Mechanical
Is Plastic PTFE stronger than Solder SAC305?
Solder SAC305 is stronger: its yield strength is 22 MPa against 9 MPa for Plastic PTFE (2.44x).
Which is lighter, Plastic PTFE or Solder SAC305?
Plastic PTFE is lighter: 2,160 kg/m³ against 7,350 kg/m³ for Solder SAC305.
Which is lighter for the same job, Plastic PTFE or Solder SAC305?
For the same stiffness or strength: Plastic PTFE is lighter for a strong rod or tie, strong beam, strong panel or plate.
Part that must be
Plastic PTFE
Solder SAC305
Strong rod or tie
lighter
39% heavier
Strong beam
lighter
1.88x heavier
Strong panel or plate
lighter
2.18x 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 is more ductile, Plastic PTFE or Solder SAC305?
Plastic PTFE stretches further before it breaks: 350% elongation at break against 49% for Solder SAC305.
Thermal
Which conducts heat better, Plastic PTFE or Solder SAC305?
Solder SAC305 conducts heat better: 61 W/m·K against 0.25 W/m·K for Plastic PTFE.
Which expands less with temperature?
Solder SAC305 expands less: 21.9 µm/m·K against 100 µm/m·K for Plastic PTFE.