Glass vs. SLA Resin Tough 2000

Compare Glass vs. SLA Resin Tough 2000 strength, stiffness, weight and thermal properties.

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SLA Resin Tough 20003D printed (SLA resin)

Mechanical
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Yield strength	not given (tensile used)	40.4MPasourcetypical
Ultimate tensile strength	41MPasourcetypical mean surface tensile stress at fracture (MOR), 60 s load, weathered, 50% breakage probability	40.4MPasourcetypical
Flexural strength	41MPasourcemean MOR (same value as tensile)	67MPasourcetypical
Elongation at break	not sourced	79%sourcetypical
Young's modulus (stiffness)	72GPasourcetypical40x stiffer	1.8GPasourcetypical
Density	2,500kg/m³sourcetypical	1,090kg/m³sourcetypical2.29x lighter
Strength to weight	16.4kN·m/kg	37.1kN·m/kg2.26x higher
Stiffness to weight	28.8MN·m/kg17.4x higher	1.65MN·m/kg
Poisson's ratio	0.22sourcetypical	not sourced
Shear modulus	29.5GPa	not sourced
Bulk modulus	42.9GPa	not sourced
Speed of sound	5,367m/s	1,285m/s
Thermal
Thermal conductivity	0.937W/m·Ksourcetypical at 75 F	not sourced
Thermal expansion	8.3µm/m·Ksourcetypical, 75-575 F	134µm/m·Ksourcemean 0-150 °C
100 mm part over a 50 °C swing	41.5µm growth16.2x less	671µm growth
Specific heat	880J/kg·Ksourcetypical at 75 F	not sourced
Heats up and cools (diffusivity)	0.426mm²/s	not sourced
Thermal shock resistance	50.1W/m	not sourced
Glass transition	not sourced	112°CsourceDMA
Max service temperature	511°Csourcestrain point (ASTM C336) - stress-relaxation onset, not a rated service limit	57°CsourceHDT 1.8 MPa
Values for	Annealed soda-lime-silica float glass, Pilkington North America Technical Bulletin ATS-129 (04/2025)	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 Glass stronger than SLA Resin Tough 2000?

Glass is stronger: its tensile strength is 41 MPa against yield strength 40.4 MPa for SLA Resin Tough 2000 (1%).

Which is lighter, Glass or SLA Resin Tough 2000?

SLA Resin Tough 2000 is lighter: 1,090 kg/m³ against 2,500 kg/m³ for Glass.

Which is stiffer, Glass or SLA Resin Tough 2000?

Glass is stiffer: Young's modulus 72 GPa against 1.8 GPa for SLA Resin Tough 2000, so the same part in Glass deflects less under the same load.

Which is lighter for the same job, Glass or SLA Resin Tough 2000?

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

Part that must be	Glass	SLA Resin Tough 2000
Stiff rod or tie (tension)	lighter	17.4x heavier
Stiff beam (bending)	lighter	2.76x heavier
Stiff panel or plate	lighter	49% heavier
Strong rod or tie	2.26x heavier	lighter
Strong beam	2.27x heavier	lighter
Strong panel or plate	2.28x 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?

Glass expands less: 8.3 µm/m·K against 134 µm/m·K for SLA Resin Tough 2000.

Among 72 materials

Stiffness against density

Strength against density