Materials / Compare
Solder SAC305 vs. Steel AISI 1018
Compare Solder SAC305 vs. Steel AISI 1018 strength, stiffness, weight and thermal properties.
| Try it on a partA bracket to run stress or thermal on, free in your browser | Open in LessCAD | Open in LessCAD |
|---|---|---|
| Mechanical | ||
| Yield strength | 22MPasourcetypical | 372MPasourceproducer-stated, cold drawn |
| Ultimate tensile strength | 39.6MPasourcetypical | 441MPasourceproducer-stated, cold drawn |
| Elongation at break | 49%sourcetypical | 15%sourcein 2 in (50.8 mm) |
| Young's modulus (stiffness) | 6.9GPasourcetypical, temperature and strain rate not stated | 200GPasourcebase material: AISI 1025 plain carbon steel (MIL-HDBK-5J design value; ASTM A108 bar is the cold-finished carbon-steel bar spec that also covers 1018) |
| Density | 7,350kg/m³sourcetypical | 7,861kg/m³sourcebase material: AISI 1025 plain carbon steel (MIL-HDBK-5J design value; ASTM A108 bar is the cold-finished carbon-steel bar spec that also covers 1018) |
| Strength to weight | 2.99kN·m/kg | 47.3kN·m/kg15.8x higher |
| Stiffness to weight | 0.939MN·m/kg | 25.4MN·m/kg27.1x higher |
| Poisson's ratio | 0.35sourcetypical | 0.32sourcebase material: AISI 1025 plain carbon steel (MIL-HDBK-5J design value; ASTM A108 bar is the cold-finished carbon-steel bar spec that also covers 1018) |
| Shear modulus | 2.56GPa | 75.7GPa29.6x stiffer in shear |
| Bulk modulus | 7.67GPa | 185GPa |
| Speed of sound | 969m/s | 5,043m/s |
| Thermal | ||
| Thermal conductivity | 61W/m·Ksourcetypical, temperature not stated | 51.9W/m·Ksourcebase material: AISI 1025 plain carbon steel (MIL-HDBK-5J design value; ASTM A108 bar is the cold-finished carbon-steel bar spec that also covers 1018) |
| Thermal expansion | 21.9µm/m·Ksourcemean, 20-100 °C (MacDermid Alpha) | 12µm/m·Ksourcebase material: unalloyed carbon steel, Ovako family table (S275JR, 'none alloyed structural steels', C <= 0.21%); mean 20-300 °C |
| 100 mm part over a 50 °C swing | 110µm growth | 60µm growth1.82x less |
| Specific heat | 232J/kg·Ksourcetypical (MacDermid Alpha) | 486J/kg·Ksourcebase material: AISI 1025 plain carbon steel (MIL-HDBK-5J design value; ASTM A108 bar is the cold-finished carbon-steel bar spec that also covers 1018) |
| Heats up and cools (diffusivity) | 35.8mm²/s2.63x faster | 13.6mm²/s |
| Thermal shock resistance | 5,773W/m5% more resistant | 5,473W/m |
| Melting point | 217–220°Csourcesolidus-liquidus | not sourced |
| Values for | 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). | AISI 1018 cold drawn bar (Niagara LaSalle, cold-finished bar producer) |
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 Solder SAC305 stronger than Steel AISI 1018?
Steel AISI 1018 is stronger: its yield strength is 372 MPa against 22 MPa for Solder SAC305 (16.9x).
Which is lighter, Solder SAC305 or Steel AISI 1018?
Solder SAC305 is lighter: 7,350 kg/m³ against 7,861 kg/m³ for Steel AISI 1018.
Which is stiffer, Solder SAC305 or Steel AISI 1018?
Steel AISI 1018 is stiffer: Young's modulus 200 GPa against 6.9 GPa for Solder SAC305, so the same part in Steel AISI 1018 deflects less under the same load.
Which is lighter for the same job, Solder SAC305 or Steel AISI 1018?
For the same stiffness or strength: Steel AISI 1018 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 | Solder SAC305 | Steel AISI 1018 |
|---|---|---|
| Stiff rod or tie (tension) | 27.1x heavier | lighter |
| Stiff beam (bending) | 5.03x heavier | lighter |
| Stiff panel or plate | 2.87x heavier | lighter |
| Strong rod or tie | 15.8x heavier | lighter |
| Strong beam | 6.16x heavier | lighter |
| Strong panel or plate | 3.84x heavier | lighter |
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, Solder SAC305 or Steel AISI 1018?
Solder SAC305 conducts heat better: 61 W/m·K against 51.9 W/m·K for Steel AISI 1018.
Which expands less with temperature?
Steel AISI 1018 expands less: 12 µm/m·K against 21.9 µm/m·K for Solder SAC305.