Materials / Compare
Steel vs. Steel AISI 1045
Compare Steel vs. Steel AISI 1045 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 | 531MPasourceproducer-stated, cold drawn |
| Ultimate tensile strength | 505MPasourcetypical: mean of 20,295 A992 flange mill-test coupons (1998 SSPC survey) | 627MPasourceproducer-stated, cold drawn |
| Elongation at break | not sourced | 12%sourcein 2 in (50.8 mm) |
| Young's modulus (stiffness) | 200GPasourcedesign value (AISC 360-16) | 210GPasourcetypical |
| Density | 7,850kg/m³sourcenominal (constructional data) | 7,800kg/m³sourcetypical |
| Strength to weight | 49kN·m/kg | 68.1kN·m/kg39% higher |
| Stiffness to weight | 25.5MN·m/kg | 26.9MN·m/kg6% higher |
| Poisson's ratio | 0.3sourcedesign value (AISC 360-16 Commentary) | 0.3sourcetypical |
| Shear modulus | 76.9GPa | 80.8GPa5% stiffer in shear |
| Bulk modulus | 167GPa | 175GPa |
| Speed of sound | 5,048m/s | 5,189m/s |
| Thermal | ||
| Thermal conductivity | 48W/m·Ksourcenominal at 20 °C | 40–45W/m·Ksourcetypical range, ambient |
| Thermal expansion | 12µm/m·Ksourcenominal (constructional data, no temperature range stated) | 12µm/m·Ksourcetypical, 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 | 460–480J/kg·Ksourcetypical range, 50/100 °C |
| Heats up and cools (diffusivity) | 13mm²/s12% faster | 11.6mm²/s |
| Thermal shock resistance | 5,390W/m | 6,269W/m16% 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 1045 cold drawn bar (Niagara LaSalle) for mechanical; Ovako C45 (lists 'SAE 1045' as a similar designation) for physical constants |
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 1045?
Steel AISI 1045 is stronger: its yield strength is 531 MPa against 385 MPa for Steel (38%).
Which is lighter, Steel or Steel AISI 1045?
Steel AISI 1045 is lighter: 7,800 kg/m³ against 7,850 kg/m³ for Steel.
Which is stiffer, Steel or Steel AISI 1045?
Steel AISI 1045 is stiffer: Young's modulus 210 GPa against 200 GPa for Steel, so the same part in Steel AISI 1045 deflects less under the same load.
Which is lighter for the same job, Steel or Steel AISI 1045?
For the same stiffness or strength: Steel AISI 1045 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 | Steel | Steel AISI 1045 |
|---|---|---|
| Stiff rod or tie (tension) | 6% heavier | lighter |
| Stiff beam (bending) | 3% heavier | lighter |
| Stiff panel or plate | 2% heavier | lighter |
| Strong rod or tie | 39% heavier | lighter |
| Strong beam | 25% heavier | lighter |
| Strong panel or plate | 18% 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, Steel or Steel AISI 1045?
Steel conducts heat better: 48 W/m·K against 42.5 W/m·K for Steel AISI 1045.
Which expands less with temperature?
Steel expands less: 12 µm/m·K against 12 µm/m·K for Steel AISI 1045.