Certain investigation on feasibility of developing riser less ductile iron castings Saravanan Venkatachalam Subramanian, Chandramohan Palanisamy, Raghu Raman and Peter Apata Olubambi E3S Web Conf., 505 (2024) 01039 Published online: 25 March 2024 DOI: 10.1051/e3sconf/202450501039