high purity pig iron (also known as nodular pig iron): used in the manufacture of ductile [also known as nodular or spheroidal graphite – SG] iron castings. Pig iron is the product of smelting iron ore (also ilmenite) with a high- carbon fuel and reductant such as coke, usually with limestone as a flux. Nickel pig iron (NPI) is a low grade ferronickel invented in China as a cheaper alternative to pure nickel for the production of stainless steel. This looked a lot like a sow suckling piglets. Other Answers:Pig iron is called pig iron because due to it shape andmolds. Carbon content of pig iron is 4%.



The oldest method of pig casting in sandbeds has been largely superseded by pig casting machines.

The iron obtained from blast furnaces is known as pig iron.

Pig iron also known as hot metal is the product of blast furnace obtained by reduction of iron ore with coke. The simple answer is that it was poured into an open mould consisting of central trough with lines of ingot moulds perpendicular to it. The central runner is supposed to resemble a pig’s sow, while the pieces of pig iron connected to the runner are its piglets, hence the reason why it is called “pig iron.” History of the Pig Iron

Other Answers: Pig iron is called pig iron because due to it shape and molds. The resulting ingots woudl be called ‘pigs’. The row of molds was said to resemble a litter of suckling pigs, hence the individual ingots were referred to as pigs and the runner was called the sow. Pig iron has high impurity like Si , Mn, P etc. Pig iron is produced by smelting or iron ore in blast furnaces or by smelting ilmenite in electric furnaces. When the hot melted ore was poured out of the blast furnace, it ran into a long tray, called a runner, with several smaller inlets off a main branch. Other Answers: Pig iron is called pig iron because due to it shape and molds.

Unlike pig iron, cast iron is extremely hard and brittle. When the combined material cools, it forms a high- carbon product known as pig iron. The alternative was developed as a response to high price of pure nickel.
It contains a lower amount of carbon (3%) than pig iron.

Cast iron is obtained by melting pig iron and coke using a hot air blast.