  Using an eighth-order Taylor expansion in baryon chemical potential, we
recently obtained the (2+1)-flavor QCD equation of state (EoS) at non-zero
conserved charge chemical potentials from the lattice. We focused on
strangeness-neutral, isospin-symmetric QCD matter, which closely resembles the
situation encountered in heavy-ion collision experiments. Using this EoS, we
present here results on various QCD material parameters; in particular we
compute the specific heat, speed of sound, and compressibility along
appropriate lines of constant physics. We show that in the entire range
relevant for the beam energy scan at RHIC, the specific heat, speed of sound,
and compressibility show no indication for an approach to critical behavior
that one would expect close to a possibly existing critical endpoint.
