How to choose ductile iron and gray iron?
Because of their combination of properties, castability and cost effectiveness, gray and ductile iron are the dominant metals (based on weight) produced in metalcasting facilities today. When sourcing, designing and purchasing ductile and gray iron castings, a number of variables must be considered when choosing between the two. This comparison of gray and ductile iron will help designers and purchasers decide which alloy is suitable for a specific cast component. Gray iron is the preferred material when seeking low-cost, complex geometries with strength and high density. Gray iron can be used for a wide range of applications, from table legs and bases to large fountains and building facades. Gray iron is particularly good for applications in which vibration damping is required, such as engine blocks and frames for manufacturing equipment. For higher strength applications, ductile iron can be used. Ductile iron, because of its strength and ductility, often is specified in severe applic