Sheet metal forming plays a major role in automobile and automobile spare parts manufacturing industries. The objective is to determine the forming limit diagram for the bimetal sheet so as to predict the formability/ductility. Only few researchers have worked in the forming limit of bimetal sheet. In this work, bimetal sheet with two different combinations of copper with steel and aluminium with steel were used. Experimental and numerical analysis were carried out to find the forming limit of the material. Erichsen cupping test were performed as per ASTM E2218 standards to evaluate the ability of metallic sheets and strips to undergo plastic deformation in stretch forming. Numerical simulation using ANSYS and LS DYNA were carried out to find the forming limit. Preliminary tests like tensile test, micro hardness and impact test were carried out to find the mechanical properties of the bimetal material. Mechanical tests reveal that relatively both the samples reasonable ductile property as required for its application. As far as forming limit in Erichsen cupping test and in numerical method; both the samples shows that their safety margin % from forming limit curve is of about 30%. Using the forming limit diagram (safety margin percentage); the material can be utilized to its maximum and more efficiently in manufacture of automotive components.