Thermal conductivity against densityHigher and further left: spreads more heat for its weightThermal expansion against thermal conductivityLower and further right: warps less when heated
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Sources3 documents: Kaiser Aluminum, Indium Corporation, MacDermid Alpha
Aluminum 3003-O
3003-O (annealed) aluminium-manganese alloy, the heat-exchanger tube and brazing alloy, Kaiser Aluminum Tube & Pipe Alloy 3003 Technical Data (Rev. 05/06), typical properties; specific heat from the NIST cryogenic 3003-F fit at 293 K.
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
Alloy 3003 Tube & Pipe Technical Data, Rev. 05/06Kaiser Aluminumarchived copyAluminum 3003-O · Yield strength: typical, O, 0.0625 in specimenAluminum 3003-O · Ultimate tensile strength: typical, OAluminum 3003-O · Elongation at break: typical, O, in 4DAluminum 3003-O · Young's modulus (stiffness): typicalAluminum 3003-O · Density: nominal, 20 °CAluminum 3003-O · Thermal conductivity: typical, O, 20 °CAluminum 3003-O · Thermal expansion: typical, mean 20-100 °CAluminum 3003-O · Melting point: melting range
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
3
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)
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 Aluminum 3003-O stronger than Solder SAC305?
Aluminum 3003-O is stronger: its yield strength is 40 MPa against 22 MPa for Solder SAC305 (1.82x).
Which is lighter, Aluminum 3003-O or Solder SAC305?
Aluminum 3003-O is lighter: 2,730 kg/m³ against 7,350 kg/m³ for Solder SAC305.
Which is stiffer, Aluminum 3003-O or Solder SAC305?
Aluminum 3003-O is stiffer: Young's modulus 69 GPa against 6.9 GPa for Solder SAC305, so the same part in Aluminum 3003-O deflects less under the same load.
Which is lighter for the same job, Aluminum 3003-O or Solder SAC305?
For the same stiffness or strength: Aluminum 3003-O 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
Aluminum 3003-O
Solder SAC305
Stiff rod or tie (tension)
lighter
26.9x heavier
Stiff beam (bending)
lighter
8.51x heavier
Stiff panel or plate
lighter
5.8x heavier
Strong rod or tie
lighter
4.9x heavier
Strong beam
lighter
4.01x heavier
Strong panel or plate
lighter
3.63x 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, Aluminum 3003-O or Solder SAC305?
Solder SAC305 stretches further before it breaks: 49% elongation at break against 30% for Aluminum 3003-O.
Thermal
Which conducts heat better, Aluminum 3003-O or Solder SAC305?
Aluminum 3003-O conducts heat better: 193 W/m·K against 61 W/m·K for Solder SAC305.
Which expands less with temperature?
Solder SAC305 expands less: 21.9 µm/m·K against 23.2 µm/m·K for Aluminum 3003-O.