FDM ASA vs. Steel AISI 1045

Compare FDM ASA vs. Steel AISI 1045 strength, stiffness, weight and thermal properties.

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FDM ASA3D printed (FDM)

Mechanical
Try it on a partA bracket to run stress or thermal on, free in your browser	Open in LessCAD	Open in LessCAD
Yield strength	not given (tensile used)	531MPasourceproducer-stated, cold drawn
Ultimate tensile strength	37MPasourcetypical	627MPasourceproducer-stated, cold drawn
Flexural strength	65MPasourcetypical	not sourced
Elongation at break	9.2%sourcetypical	12%sourcein 2 in (50.8 mm)
Young's modulus (stiffness)	2.45GPasourcetypical	210GPasourcetypical85.7x stiffer
Density	1,050kg/m³sourcetypical7.43x lighter	7,800kg/m³sourcetypical
Strength to weight	35.2kN·m/kg	68.1kN·m/kg1.93x higher
Stiffness to weight	2.33MN·m/kg	26.9MN·m/kg11.5x higher
Poisson's ratio	not sourced	0.3sourcetypical
Shear modulus	not sourced	80.8GPa
Bulk modulus	not sourced	175GPa
Speed of sound	1,528m/s	5,189m/s
Thermal
Thermal conductivity	0.17W/m·Ksourcebase material: INEOS Styrolution Luran S 777K injection-molding ASA, typical	40–45W/m·Ksourcetypical range, ambient
Thermal expansion	80–110µm/m·Ksourcebase material: INEOS Styrolution Luran S 777K injection-molding ASA, range	12µm/m·Ksourcetypical, mean 20-300 °C
100 mm part over a 50 °C swing	475µm growth	60µm growth7.92x 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
Max service temperature	92°CsourceHDT 1.8 MPa	not sourced
Values for	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.	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.

FDM ASA is 3D printed: its properties depend on build direction and print settings; these are typical values.

Questions

Is FDM ASA stronger than Steel AISI 1045?

Steel AISI 1045 is stronger: its yield strength is 531 MPa against tensile strength 37 MPa for FDM ASA (14.4x).

Which is lighter, FDM ASA or Steel AISI 1045?

FDM ASA is lighter: 1,050 kg/m³ against 7,800 kg/m³ for Steel AISI 1045.

Which is stiffer, FDM ASA or Steel AISI 1045?

Steel AISI 1045 is stiffer: Young's modulus 210 GPa against 2.45 GPa for FDM ASA, so the same part in Steel AISI 1045 deflects less under the same load.

Which is lighter for the same job, FDM ASA or Steel AISI 1045?

For the same stiffness or strength: FDM ASA 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	FDM ASA	Steel AISI 1045
Stiff rod or tie (tension)	11.5x heavier	lighter
Stiff beam (bending)	25% heavier	lighter
Stiff panel or plate	lighter	1.68x heavier
Strong rod or tie	1.93x heavier	lighter
Strong beam	lighter	26% heavier
Strong panel or plate	lighter	1.96x 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 conducts heat better, FDM ASA or Steel AISI 1045?

Steel AISI 1045 conducts heat better: 42.5 W/m·K against 0.17 W/m·K for FDM ASA.

Which expands less with temperature?

Steel AISI 1045 expands less: 12 µm/m·K against 95 µm/m·K for FDM ASA.

Among 72 materials

Stiffness against density

Strength against density