Ductile iron manhole covers are one type of ductile iron products. Ductile iron obtained Spheroidal graphite through ball and bred deal, which effectively improve the mechanical properties of cast iron , especially improve the ductility and toughness , resulting in higher strength than carbon steel . Ductile iron was developed a high-strength cast iron materials in the 1950s. its overall performance is close to steel. Based on its excellent performance ,Ductile iron has been successfully used to cast some of the complex force , strength, toughness, wear require a higher parts. Ductile iron has been behind the rapid development of gray cast iron widely used . The so-called " Replace steel with iron " , mainly referring to ductile iron.In now market,many factories are producing ductile iron manhole covers.   ADVANTAGES OF 'DUCTILE IRON' MANHOLE COVERS, FRAMES & GRATINGS:

• High Strength, results in More Life and Durability
• Available with Elegant Checkers Design, offers Good Anti- skid Grip and Nice Appearance.
• Due to it's Hinge type Design, Chances of Theft are Less.
• Suitable for Heavy Traffic Loading and at High speed.
• Chances of Accidents are almost Reduced, as it Does Not Break Suddenly.
• Due to High Strength, 'Ductile Iron' Minimises the Risk of Failure during normal uses and offers Resistance to Impact.
• Ductile Iron's High Strength to Weight ratio allows the manufacturers to relatively manufacture Light Weight Castings, offering up to 50% Weight Savings over Grey Iron Castings, subsequently Saving in Cost Per Piece.
• Lightweight Castings offer Cost Benefits, from Transportation to Installation, providing Ease of Handling and Maintenance during service.