Materials / Compare
Steel vs. Steel AISI 1018
Compare Steel 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 | 385MPasourcetypical: mean of 20,295 A992 flange mill-test coupons (1998 SSPC survey), as reported by AISC | 372MPasourceproducer-stated, cold drawn |
| Ultimate tensile strength | 505MPasourcetypical: mean of 20,295 A992 flange mill-test coupons (1998 SSPC survey) | 441MPasourceproducer-stated, cold drawn |
| Elongation at break | not sourced | 15%sourcein 2 in (50.8 mm) |
| Young's modulus (stiffness) | 200GPasourcedesign value (AISC 360-16) | 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 | 7,850kg/m³sourcenominal (constructional data) | 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 | 49kN·m/kg4% higher | 47.3kN·m/kg |
| Stiffness to weight | 25.5MN·m/kg | 25.4MN·m/kg |
| Poisson's ratio | 0.3sourcedesign value (AISC 360-16 Commentary) | 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 | 76.9GPa2% stiffer in shear | 75.7GPa |
| Bulk modulus | 167GPa | 185GPa |
| Speed of sound | 5,048m/s | 5,043m/s |
| Thermal | ||
| Thermal conductivity | 48W/m·Ksourcenominal at 20 °C | 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 | 12µm/m·Ksourcenominal (constructional data, no temperature range stated) | 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 | 60µm growth | 60µm growth |
| Specific heat | 460–480J/kg·Ksourcebase material: EN S275JR unalloyed structural steel (the EN counterpart of A36), typical, 50/100 °C | 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) | 13mm²/s | 13.6mm²/s4% faster |
| Thermal shock resistance | 5,390W/m | 5,473W/m2% more resistant |
| Values for | Generic structural steel, cited as ASTM A992 (the current US structural grade): ASTM A992 W-shapes; Fy/Fu specified minimums from AISC publications (AISC 360-16 Commentary; Modern Steel Construction); elastic constants AISC 360; physical constants from the bauforumstahl structural-steel EPD, which names A992 among covered product standards. | 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 Steel stronger than Steel AISI 1018?
Steel is stronger: its yield strength is 385 MPa against 372 MPa for Steel AISI 1018 (3%).
Which is lighter, Steel or Steel AISI 1018?
Steel is lighter: 7,850 kg/m³ against 7,861 kg/m³ for Steel AISI 1018.
Which is stiffer, Steel or Steel AISI 1018?
Steel is stiffer: Young's modulus 200 GPa against 200 GPa for Steel AISI 1018, so the same part in Steel deflects less under the same load.
Which is lighter for the same job, Steel or Steel AISI 1018?
For the same stiffness or strength: Steel is lighter for a strong rod or tie, strong beam, strong panel or plate.
| Part that must be | Steel | Steel AISI 1018 |
|---|---|---|
| Stiff rod or tie (tension) | about equal | about equal |
| Stiff beam (bending) | about equal | about equal |
| Stiff panel or plate | about equal | about equal |
| Strong rod or tie | lighter | 4% heavier |
| Strong beam | lighter | 2% heavier |
| Strong panel or plate | lighter | 2% 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, Steel or Steel AISI 1018?
Steel AISI 1018 conducts heat better: 51.9 W/m·K against 48 W/m·K for Steel.
Which expands less with temperature?
Steel expands less: 12 µm/m·K against 12 µm/m·K for Steel AISI 1018.