What is Spheroidal Graphite (SG) Iron, and What is It’s Difference from Cast Iron?

Spheroidal Graphite cast Iron is the fancy name of “ductile iron”. One of the main ingredients of this iron is graphite, which is added to make it stronger. Ductile iron also contains 3.2-3.6% carbon.

Many other types of iron components also contain graphite. However, the spherical shape of this ductile cast iron gives its name “spheroidal”.

The spheroidal graphite (S.G) cast iron is produced by adding magnesium and cerium to the molten cast iron during the manufacturing process in a foundry. As SG iron is one of the strongest forms of iron, many industries look for it. If you are one of them, you can contact a spheroidal graphite iron manufacturer to get the best quality S.G iron.

What Are The Uses Of S.G Iron?

S.G. cast iron is an engineering material with high flexibility, elastic modulus, mechanical strength, and corrosion resistance. It is also affordable and easy to produce. S.G. cast iron allows for high design flexibility, making it suitable for making gearboxes, crankshafts, water pump housing, pipes, valves, and transportation casks.

What is the difference between S.G. iron and Cast Iron?

S.G. iron is a specific type of cast iron. The choice between S.G. iron and other cast iron forms depends on the user’s specific requirements. Here are some factors to consider when choosing S.G. iron or traditional cast iron.

1. Graphite Structure: SG iron has a nodular graphite structure that imparts mechanical properties like high tensile strength, toughness, and flexibility. Compared to other types of cast iron, its spherical nodules make it more resistant to crack propagation.

Cast iron has different graphite structures, like flakes or compacted graphite. Though these structures offer great casting properties and wear resistivity, they might lack ductility and toughness.

2. Mechanical Properties

SG iron provides superior mechanical properties, making it suitable for areas where strength, flexibility, and resistance are important. It is used to make components subjected to dynamic loads.
Cast iron might have different mechanical properties. It is known for its impressive strength and wear resistance. However, features like tensile strength and impact resistance might not match those of SG iron.

3. Applications

SG iron is used in applications where features like strength, ductility, and resistance are important. These include components used in the automotive industry, pipe fittings, and engineering machinery.
Cast iron makes products like pipes, cookware, engine blocks, and ornamental structures. The choice of usage depends on the application’s demand.

Get in touch with a leading manufacturer of spheroidal graphite iron, offering different cast iron components, including SG iron casting. Contact us for your requirements today.