Ductile iron is an engineered material that is lighter and stronger than cast, or grey, iron, the traditional choice for manhole covers and gratings. Ductile iron, which conforms to the ASTM A536 standard, offers the combination of a significantly higher strength-to-weight ratio, impact resistance and predictable mechanical performance. These characteristics make it possible to design covers and gratings that are stronger and more durable, while also delivering ergonomic and functional advantages not readily available with traditional alternatives. To understand the differences between ductile iron and cast iron is to understand why PAM products are superior in design and performance.
why DUCTILE iron is better
