Steel-concrete-steel (SCS) sandwich panels are an effective means for protecting critical infrastructure facilities and personnel from the effects of blast and impact loading. This paper describes experiment results for non-composite steel-concrete-steel sandwich panels subjected to impact loads generated using a drop-hammer testing facility. The objectives of the experiment program are to investigate the behaviour of non-composite SCS panels under large deformations and to study the effect of utilising stainless steel for the faceplates. The panels consist of two face plates connected together by two end plates and a concrete core sandwiched between them, without mechanical shear connectors. Two types of panels were tested: i) mild steel panels, and ii) mild steel panel with stainless steel sections. The panels were inserted into specially designed key connections to restrain the axial movement of the panels, thus enabling development of the tensile membrane action in the panels under large deformations. The mass of the drop hammer was 600 kg, it was dropped from a height of 3 m to impact the SCS panels at midspan. Data collected during the tests were load, displacement and strain time histories obtained using high-speed data acquisition system at 300 kHz sampling rate. Three dimensional quarter models of the experimental setup for impact tests were modelled with the non-linear explicit finite element code LS-Dyna. The impact load, displacements and failure modes from the numerical simulation results were compared with the experimental results. Comparison with the experimental results showed the models are able to describe the behaviours of protective panel under static and impact loading conditions with reasonable accuracy.