What is vermicular cast iron?

What is vermicular cast iron?

Abstract: In vermicular graphite cast irons, graphite is present in a worm-like, stubby form with rounded edges. This material is also popularly known as compacted graphite cast iron or as CG iron.

What is compacted graphite iron used for?

More recently compacted graphite iron has been used for diesel engine blocks. It has proven to be useful in the manufacture of V topology diesel engines where the loading on the block is very high between the cylinder banks, and for heavy goods vehicles which use diesel engines with high combustion pressures.

How strong is compacted graphite iron?

While not quite as strong as ductile iron, CGI is 75 percent stronger and up to 75 percent stiffer than gray iron. The thermal and damping characteristics of CGI are midway between ductile and gray iron.

What is compact graphite cast iron?

Compacted Graphite Iron, which is also known as CGI or Vermicular Graphite Iron, is a form of cast iron in which the shape of the graphite particles is between that of conventional grey iron flakes and ductile iron where the graphite is in spheres.

What is the meaning of vermicular?

Definition of vermicular 1a : resembling a worm in form or motion. b : vermiculate. 2 : of, relating to, or caused by worms.

What is SGI material?

SG Iron is also known as Ductile Cast Iron, Nodular Cast Iron, Spheroidal Graphite Iron and Spherulitic Cast Iron. This grade of Iron was developed over 60 years ago and in the USA. The main characteristic of this material is the structure of the graphite.

How is compacted graphite iron made?

Similar to ductile iron, compacted graphite iron is produced by adding magnesium to a desulfurized base iron. As shown in Figure 3, CGI is stable over a range of approximately 0.008% magnesium (Mg), which is approximately five times smaller than the commercially used Mg-range for ductile iron.

What cast iron has modular or spheroidal graphite?

Ductile iron
Ductile iron, also known as ductile cast iron, nodular cast iron, spheroidal graphite iron, spheroidal graphite cast iron and SG iron, is a type of graphite-rich cast iron discovered in 1943 by Keith Millis.

What is full form of SG iron?

SG Iron Stands For Spheroidal Graphite Iron.

Can you weld compacted graphite iron?

Welding electrode has high tolerance for phosphorus and other contaminants in the base metal, so high strength, good ductile welds can be made in low-grade cast irons. It can be used for joining gray iron, ductile iron, compacted graphite iron, malleable iron and various alloyed irons.

Which cast iron is also called as spheroidal?

Nodular (spheroidal graphite) cast iron Nodular iron is also called ductile iron. The graphite is present as tiny balls or spheroids. Because the spheroids interrupt the matrix much less than graphite flakes, nodular cast iron has higher strength and toughness than gray cast iron.

Which type of cast iron is strongest?

gray cast iron
While the hardness and strength of steel almost always increase as carbon content rises, in the case of gray cast iron the strongest, hardest grades have less carbon than some of the lower-strength, less expensive grades. Gray iron is usually cast in sand molds, and allowed to cool normally in the mold.