It is a white cast iron, made by a surcharge of ore in the furnace.
The changes that take place from grey to white cast iron, merely by difference in the rate of cooling.
The white cast iron is stronger than the grey, but being more brittle it is not so suitable for resisting suddenly applied loads.
white cast iron has a higher specific gravity than grey cast iron.
The French fusible ores, such as the silicates of iron, are very apt to smelt into white cast iron.
In its state of perfection, white cast iron has a silver colour, and a bright metallic lustre.
In a third species of white cast iron we observe still much lustre, but its colour verges upon gray, and its texture is variable.