Gas holder materials

Cast iron and wrought iron were both used to construct the gas holder frames at the Pancras gas works. Cast iron can be melted down and poured into a mould to shape and solidify. Wrought iron is made by reprocessing cast iron, and is said to be stronger than cast iron due to the way it is made; the strength of wrought iron is more certain than cast iron. Wrought iron is often used present day to construct gates and fences.

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