Materials / Compare
Iron vs. SLA Resin Tough 2000
Compare Iron vs. SLA Resin Tough 2000 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 | 186MPasourcetypical (0.2% YS), hot rolled + SRA/recrystallization anneal | 40.4MPasourcetypical |
| Ultimate tensile strength | 290MPasourcetypical, SRA/recrystallization anneal | 40.4MPasourcetypical |
| Flexural strength | not sourced | 67MPasourcetypical |
| Elongation at break | 38%sourcetypical, gauge 4D0 | 79%sourcetypical |
| Young's modulus (stiffness) | 207GPasourcetypical, after SRA/recrystallization anneal | 1.8GPasourcetypical |
| Density | 7,860kg/m³sourcetypical | 1,090kg/m³sourcetypical7.21x lighter |
| Strength to weight | 23.7kN·m/kg | 37.1kN·m/kg1.57x higher |
| Stiffness to weight | 26.3MN·m/kg15.9x higher | 1.65MN·m/kg |
| Poisson's ratio | 0.282sourceNIST critically evaluated best value (polycrystalline iron) | not sourced |
| Shear modulus | 80.7GPa | not sourced |
| Bulk modulus | 158GPa | not sourced |
| Speed of sound | 5,132m/s | 1,285m/s |
| Thermal | ||
| Thermal conductivity | 73.2W/m·Ksourcetypical at 20 °C | not sourced |
| Thermal expansion | 13.7µm/m·Ksourcemean, 20-399 °C | 134µm/m·Ksourcemean 0-150 °C |
| 100 mm part over a 50 °C swing | 68.5µm growth9.8x less | 671µm growth |
| Specific heat | 450J/kg·Ksourcetypical | not sourced |
| Heats up and cools (diffusivity) | 20.7mm²/s | not sourced |
| Thermal shock resistance | 3,447W/m | not sourced |
| Melting point | 1,532°Csourcetypical | not sourced |
| Glass transition | not sourced | 112°CsourceDMA |
| Max service temperature | not sourced | 57°CsourceHDT 1.8 MPa |
| Values for | Cleveland-Cliffs / AK Steel ARMCO Pure Iron Product Data Bulletin (07/2022): Table 1 typical physical properties, Table 2 typical mechanical properties after SRA/recrystallization anneal. | Formlabs Tough 2000 Resin V2 (FLTO2002), TDS Rev. 01 10/06/2025; printed on Form 4 at 100 µm, washed in Form Wash V2 10+5 min in >=99% IPA, post-cured 70 °C for 12 min in Form Cure V2. Orientation not stated. |
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.
SLA Resin Tough 2000 is 3D printed: its properties depend on build direction and print settings; these are typical values.
Questions
Is Iron stronger than SLA Resin Tough 2000?
Iron is stronger: its yield strength is 186 MPa against 40.4 MPa for SLA Resin Tough 2000 (4.6x).
Which is lighter, Iron or SLA Resin Tough 2000?
SLA Resin Tough 2000 is lighter: 1,090 kg/m³ against 7,860 kg/m³ for Iron.
Which is stiffer, Iron or SLA Resin Tough 2000?
Iron is stiffer: Young's modulus 207 GPa against 1.8 GPa for SLA Resin Tough 2000, so the same part in Iron deflects less under the same load.
Which is lighter for the same job, Iron or SLA Resin Tough 2000?
For the same stiffness or strength: Iron is lighter for a stiff rod or tie (tension), stiff beam (bending); SLA Resin Tough 2000 is lighter for a stiff panel or plate, strong rod or tie, strong beam, strong panel or plate.
| Part that must be | Iron | SLA Resin Tough 2000 |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 15.9x heavier |
| Stiff beam (bending) | lighter | 49% heavier |
| Stiff panel or plate | 48% heavier | lighter |
| Strong rod or tie | 1.57x heavier | lighter |
| Strong beam | 2.61x heavier | lighter |
| Strong panel or plate | 3.36x 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 expands less with temperature?
Iron expands less: 13.7 µm/m·K against 134 µm/m·K for SLA Resin Tough 2000.