A special area of expertise for NEI is Austempered Ductile Iron (ADI). ADI is a range of heat-treated ductile cast irons with high strength, excellent toughness, good fatigue properties and superior wear characteristics. It’s tensile, and yield strengths are at least twice that of standard ductile iron, making ADI a cost-effective replacement for structural steels and materials used in high-wear applications. NEI offers a unique foundry solution to ADI by operating our own in-house salt-to-salt austempering line within ACP.