  Based on the isospin-dependent quantum molecular dynamics (IQMD) picture, we
attempt to understand the nature of transverse flow in
$_{28}Ni^{58}+_{28}Ni^{58}$ and $_{26}Fe^{58}+_{26}Fe^{58}$ systems at wide
range of energies and impact parameters. The isospin dependence of balance
energy in transverse flow is clearly visible. The results are compared with the
experimental data available.
