SLA Resin Tough 2000 vs. Steel AISI 1045

Compare SLA Resin Tough 2000 vs. Steel AISI 1045 strength, stiffness, weight and thermal properties.

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SLA Resin Tough 20003D printed (SLA resin)

Mechanical
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Yield strength	40.4MPasourcetypical	531MPasourceproducer-stated, cold drawn
Ultimate tensile strength	40.4MPasourcetypical	627MPasourceproducer-stated, cold drawn
Flexural strength	67MPasourcetypical	not sourced
Elongation at break	79%sourcetypical	12%sourcein 2 in (50.8 mm)
Young's modulus (stiffness)	1.8GPasourcetypical	210GPasourcetypical117x stiffer
Density	1,090kg/m³sourcetypical7.16x lighter	7,800kg/m³sourcetypical
Strength to weight	37.1kN·m/kg	68.1kN·m/kg1.84x higher
Stiffness to weight	1.65MN·m/kg	26.9MN·m/kg16.3x higher
Poisson's ratio	not sourced	0.3sourcetypical
Shear modulus	not sourced	80.8GPa
Bulk modulus	not sourced	175GPa
Speed of sound	1,285m/s	5,189m/s
Thermal
Thermal conductivity	not sourced	40–45W/m·Ksourcetypical range, ambient
Thermal expansion	134µm/m·Ksourcemean 0-150 °C	12µm/m·Ksourcetypical, mean 20-300 °C
100 mm part over a 50 °C swing	671µm growth	60µm growth11.2x less
Specific heat	not sourced	460–480J/kg·Ksourcetypical range, 50/100 °C
Heats up and cools (diffusivity)	not sourced	11.6mm²/s
Thermal shock resistance	not sourced	6,269W/m
Glass transition	112°CsourceDMA	not sourced
Max service temperature	57°CsourceHDT 1.8 MPa	not sourced
Values for	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.	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.

SLA Resin Tough 2000 is 3D printed: its properties depend on build direction and print settings; these are typical values.

Questions

Is SLA Resin Tough 2000 stronger than Steel AISI 1045?

Steel AISI 1045 is stronger: its yield strength is 531 MPa against 40.4 MPa for SLA Resin Tough 2000 (13.1x).

Which is lighter, SLA Resin Tough 2000 or Steel AISI 1045?

SLA Resin Tough 2000 is lighter: 1,090 kg/m³ against 7,800 kg/m³ for Steel AISI 1045.

Which is stiffer, SLA Resin Tough 2000 or Steel AISI 1045?

Steel AISI 1045 is stiffer: Young's modulus 210 GPa against 1.8 GPa for SLA Resin Tough 2000, so the same part in Steel AISI 1045 deflects less under the same load.

Which is lighter for the same job, SLA Resin Tough 2000 or Steel AISI 1045?

For the same stiffness or strength: SLA Resin Tough 2000 is lighter for a stiff panel or plate, strong beam, strong panel or plate; Steel AISI 1045 is lighter for a stiff rod or tie (tension), stiff beam (bending), strong rod or tie.

Part that must be	SLA Resin Tough 2000	Steel AISI 1045
Stiff rod or tie (tension)	16.3x heavier	lighter
Stiff beam (bending)	1.51x heavier	lighter
Stiff panel or plate	lighter	46% heavier
Strong rod or tie	1.84x heavier	lighter
Strong beam	lighter	28% heavier
Strong panel or plate	lighter	1.97x 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 expands less with temperature?

Steel AISI 1045 expands less: 12 µm/m·K against 134 µm/m·K for SLA Resin Tough 2000.

Among 59 materials

Stiffness against density

Strength against density