FDM ASA vs. SLA Resin Tough 2000

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

FDM ASA3D printed (FDM)

SLA Resin Tough 20003D printed (SLA resin)

Mechanical	FDM ASA	SLA Resin Tough 2000
Yield strength	not given (tensile used)	40.4MPa1
Ultimate tensile strength	37MPa2	40.4MPa1
Flexural strength	65MPa2	67MPa1
Elongation at break	9.2%2	79%18.59x more ductile
Young's modulus (stiffness)	2.45GPa236% stiffer	1.8GPa1
Density	1,050kg/m³2	1,090kg/m³1
Strength to weight	35.2kN·m/kg	37.1kN·m/kg5% higher
Stiffness to weight	2.33MN·m/kg41% higher	1.65MN·m/kg
Poisson's ratio	not sourced	not sourced
Shear modulus	not sourced	not sourced
Bulk modulus	not sourced	not sourced
Speed of sound	1,528m/s19% faster	1,285m/s

Stiffness against densityHigher and further left: stiffer for its weight

Strength against densityHigher and further left: stronger for its weight

Thermal	FDM ASA	SLA Resin Tough 2000
Thermal conductivity	base material0.17W/m·K3	not sourced
Thermal expansion	base material80–110µm/m·K3	mean 0-150 °C134µm/m·K1
100 mm part over a 50 °C swing	475µm growth41% less	671µm growth
Specific heat	not sourced	not sourced
Heats up and cools (diffusivity)	not sourced	not sourced
Thermal shock resistance	not sourced	not sourced
Glass transition	not sourced	DMA112°C1
Max service temperature	HDT 1.8 MPa92°C235 °C hotter	HDT 1.8 MPa57°C1

Thermal conductivity against densityHigher and further left: spreads more heat for its weight

Thermal expansion against thermal conductivityLower and further right: warps less when heated

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Sources3 documents: Formlabs, Bambu Lab, INEOS Styrolution

FDM ASA: Bambu Lab ASA, TDS V3.0, printed specimens X-Y; nozzle 260 °C, bed 80 °C, 200 mm/s, 100% infill; annealed and dried 80 °C for 12 h before testing.
SLA Resin Tough 2000: 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.

1
Tough 2000 Resin V2 Technical Data Sheet (2025)Formlabsarchived copySLA Resin Tough 2000 · Yield strength: typicalSLA Resin Tough 2000 · Ultimate tensile strength: typicalSLA Resin Tough 2000 · Flexural strength: typicalSLA Resin Tough 2000 · Elongation at break: typicalSLA Resin Tough 2000 · Young's modulus (stiffness): typicalSLA Resin Tough 2000 · Density: typicalSLA Resin Tough 2000 · Thermal expansion: mean 0-150 °CSLA Resin Tough 2000 · Glass transition: DMASLA Resin Tough 2000 · Max service temperature: HDT 1.8 MPa
2
Bambu ASA Technical Data Sheet, V3.0Bambu LabFDM ASA · Ultimate tensile strength: typicalFDM ASA · Flexural strength: typicalFDM ASA · Elongation at break: typicalFDM ASA · Young's modulus (stiffness): typicalFDM ASA · Density: typicalFDM ASA · Max service temperature: HDT 1.8 MPa
3
Luran S 777K (ASA) Product Data SheetINEOS StyrolutionFDM ASA · Thermal conductivity: base material: INEOS Styrolution Luran S 777K injection-molding ASA, typicalFDM ASA · Thermal expansion: base material: INEOS Styrolution Luran S 777K injection-molding ASA, range

Each number points to the document that states it, with the exact basis. Values without a number are computed from the sourced ones. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.

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

Questions

Mechanical

Is FDM ASA stronger than SLA Resin Tough 2000?

SLA Resin Tough 2000 is stronger: its yield strength is 40.4 MPa against tensile strength 37 MPa for FDM ASA (9%).

Which is lighter, FDM ASA or SLA Resin Tough 2000?

FDM ASA is lighter: 1,050 kg/m³ against 1,090 kg/m³ for SLA Resin Tough 2000.

Which is stiffer, FDM ASA or SLA Resin Tough 2000?

FDM ASA is stiffer: Young's modulus 2.45 GPa against 1.8 GPa for SLA Resin Tough 2000, so the same part in FDM ASA deflects less under the same load.

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

For the same stiffness or strength: FDM ASA 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.

Part that must be	FDM ASA	SLA Resin Tough 2000
Stiff rod or tie (tension)	lighter	41% heavier
Stiff beam (bending)	lighter	21% heavier
Stiff panel or plate	lighter	15% heavier
Strong rod or tie	5% heavier	lighter
Strong beam	2% heavier	lighter
Strong panel or plate	about equal	about equal

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 is more ductile, FDM ASA or SLA Resin Tough 2000?

SLA Resin Tough 2000 stretches further before it breaks: 79% elongation at break against 9.2% for FDM ASA.

Thermal

Which handles higher temperatures, FDM ASA or SLA Resin Tough 2000?

FDM ASA does: 92 °C against 57 °C for SLA Resin Tough 2000, both HDT 1.8 MPa.

Which expands less with temperature?

FDM ASA expands less: 95 µm/m·K against 134 µm/m·K for SLA Resin Tough 2000.