National Aluminium Company Limited (NALCO) has launched IA91 grade aluminium alloy ingot, a high-performance silicon-based casting alloy designed for advanced applications. Suitable for gravity and low-pressure die casting, IA91 offers strong mechanical strength and corrosion resistance for automotive, electrical and industrial sectors. CMD Brijendra Pratap Singh said the launch reflects NALCO's commitment to expanding its value-added product portfolio.