Thermal conductivity against densityHigher and further left: spreads more heat for its weightThermal expansion against thermal conductivityLower and further right: warps less when heated
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BASF Ultramid A3K (PA66, unreinforced injection-moulding grade), Product Information 02/2026, dry values (ISO methods)
SLA Resin Standard
Formlabs Clear Resin V5 (FLGPCL05), TDS Rev. 01 March 20, 2024; printed on Form 4 at 100 µm, washed 5 min in >=99% IPA, post-cured 15 min at 60 °C in Form Cure. Orientation not stated.
Clear Resin V5 Technical Data Sheet (2024)Formlabsarchived copySLA Resin Standard · Ultimate tensile strength: typicalSLA Resin Standard · Flexural strength: typicalSLA Resin Standard · Elongation at break: typicalSLA Resin Standard · Young's modulus (stiffness): typicalSLA Resin Standard · Max service temperature: HDT 1.8 MPa
3
Clear Resin V5 Technical Data Sheet (web edition)FormlabsSLA Resin Standard · Density: typical, post-cured (same for 5 min ambient and 15 min at 60 °C), ASTM D792
4
Engineering Polymers Part and Mold Design: Thermoplastics, A Design GuideCovestroPlastic Nylon PA66 · Poisson's ratio: base material: unfilled polyamide (PA), conditioned, maker design-guide family value (Covestro Table 3-1)
5
Thermal Properties of Selected Formlabs SLA ResinsFormlabsSLA Resin Standard · Thermal conductivity: typical, post-cured, ASTM E1530SLA Resin Standard · Thermal expansion: mean -30 to 140 °C, post-cured (5 min ambient cure), TMA ASTM E831SLA Resin Standard · Specific heat: typical, 25 °C, post-cured (5 min ambient cure), DSC ASTM E1269
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.
SLA Resin Standard is 3D printed: its properties depend on build direction and print settings; these are typical values.
Questions
Mechanical
Is Plastic Nylon PA66 stronger than SLA Resin Standard?
Plastic Nylon PA66 is stronger: its yield strength is 85 MPa against tensile strength 60 MPa for SLA Resin Standard (42%).
Which is lighter, Plastic Nylon PA66 or SLA Resin Standard?
Plastic Nylon PA66 is lighter: 1,130 kg/m³ against 1,210 kg/m³ for SLA Resin Standard.
Which is stiffer, Plastic Nylon PA66 or SLA Resin Standard?
Plastic Nylon PA66 is stiffer: Young's modulus 3 GPa against 2.75 GPa for SLA Resin Standard, so the same part in Plastic Nylon PA66 deflects less under the same load.
Which is lighter for the same job, Plastic Nylon PA66 or SLA Resin Standard?
For the same stiffness or strength: Plastic Nylon PA66 is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam, strong panel or plate.
Part that must be
Plastic Nylon PA66
SLA Resin Standard
Stiff rod or tie (tension)
lighter
17% heavier
Stiff beam (bending)
lighter
12% heavier
Stiff panel or plate
lighter
10% heavier
Strong rod or tie
lighter
1.52x heavier
Strong beam
lighter
35% heavier
Strong panel or plate
lighter
27% 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 is more ductile, Plastic Nylon PA66 or SLA Resin Standard?
Plastic Nylon PA66 stretches further before it breaks: 30% elongation at break against 8% for SLA Resin Standard.
Thermal
Which conducts heat better, Plastic Nylon PA66 or SLA Resin Standard?
SLA Resin Standard conducts heat better: 0.54 W/m·K against 0.33 W/m·K for Plastic Nylon PA66.
Which expands less with temperature?
Plastic Nylon PA66 expands less: 98 µm/m·K against 114 µm/m·K for SLA Resin Standard.