7075-T6/T651, Kaiser Aluminum rod & bar (mechanical) and sheet/coil/plate (physical) typical datasheets; Poisson from MIL-HDBK-5J
Formlabs Elastic 50A Resin V2 (FLELCL02), TDS Rev. 01 24.01.2024; parts printed on Form 3, 100 µm, Elastic 50A V2 settings and post-processing; tensile on Die C specimens cut from printed sheets after 3+ h at 23 °C.
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 Elastic 50A is 3D printed: its properties depend on build direction and print settings; these are typical values.
Questions
Is Aluminum 7075-T6 stronger than SLA Resin Elastic 50A?
Aluminum 7075-T6 is stronger: its yield strength is 503 MPa against tensile strength 3.4 MPa for SLA Resin Elastic 50A (148x).
Which is lighter, Aluminum 7075-T6 or SLA Resin Elastic 50A?
SLA Resin Elastic 50A is lighter: 1,010 kg/m³ against 2,800 kg/m³ for Aluminum 7075-T6.
Which is lighter for the same job, Aluminum 7075-T6 or SLA Resin Elastic 50A?
For the same stiffness or strength: Aluminum 7075-T6 is lighter for a strong rod or tie, strong beam, strong panel or plate.
Part that must be
Aluminum 7075-T6
SLA Resin Elastic 50A
Strong rod or tie
lighter
53.4x heavier
Strong beam
lighter
10.1x heavier
Strong panel or plate
lighter
4.39x 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).