High-entropy alloys (HEAs) typically contain five or more principal elements in nearly equiatomic proportions. HEAs can be formed from a virtually limitless combination of elements, creating millions of possible alloy combinations. Using thermodynamic modelling, Senkov et al.  recently predicted the equilibrium phases and properties of thousands of three- four-, five- and six-component alloys. The present study tests these predictions by casting three equimolar AlCrFeMnV, AlCrFeTiV, and AlCrMnTiV alloys, which were chosen as potential replacements for titanium alloys due to their predicted increased elastic modulus for structural applications and use in potentially corrosive environments. We present the measured the density of the alloys, the elastic modulus measured by nanoindentation, and estimations of the yield strength by Vickers microhardness. These properties are correlated to the underlying microstructures, as measured by X-ray diffraction, scanning electron microscopy, and atom probe tomography.1. Senkov ON, Miller JD, Miracle DB, Woodward C. CALPHAD 50 pp. 32–48 (2015).