Isothermal molecular dynamics simulations were carried out with the embedded-atom method as a potential to predict the melting and crystallization temperatures of nanometric sized aluminum particles in the range of $$2$$
2
–$$4 \mathrm{nm}$$
4
nm
. Simulated data predicted a decrease in the melting point $${T}_{m}$$
T
m
of aluminum nanoparticles with an increase in their inverse radius $${r}^{-1}$$
r
-
1
according to an almost linear law. The data obtained predicted a higher value of melting temperature compared to crystallization by $$\Delta T=272 \mathrm{K}$$
Δ
T
=
272
K
for a size of $$4\mathrm{ nm}$$
4
nm
and, $$\Delta T=193 K$$
Δ
T
=
193
K
for $$2\mathrm{ nm}$$
2
nm
. The $${T}_{m}$$
T
m
of the nanoparticles augmented with increasing size, from $$720 K$$
720
K
for $$2 \mathrm{nm}$$
2
nm
to $$827 \mathrm{K}$$
827
K
for $$4\mathrm{ nm}$$
4
nm
. Furthermore, a linear extrapolation of the $${T}_{m}$$
T
m
as a function of the inverse of the cubic root of the number of atoms yielded a melting temperature of aluminum of $$947 \pm 8 \mathrm{K}$$
947
±
8
K
, which is similar to previous estimations. Finally, when the number of atoms increased the number of face-centered cubic (FCC) structural units also increased, and the amorphous structure decreased.