Which metal is used in the foundry?

Each metal does not maintain similar casting properties and it is very important to consider very carefully which material is suited to each industrial product.

Aluminum is preferentially treated as a good cast-ability material. Its low melting point (approximately 660°C) allows saving time in comparison with other metals (bronze at 950°C, cast iron at 1100-1900°C of cast iron for example).

Furthermore, aluminum’s versatility also allows casting different shapes and styles therefore it is applied widely in many industries from outdoor street furniture to machine parts. The collected aluminum casting parts are highly appreciated for their smooth, polished, and bright surface finish.

At the same time, cast iron is often seen in manufacturing lighting post base, agricultural counterweight, urn planter, manhole cover, bollard, etc. due to its high-density weight and long-lasting with external expose. Cast iron lighting pole can stand at least 50 years and face up with extreme weather but still performs good look, whereas, the ductile iron manhole cover is able to withstand a dozen tons of loading.

Oppositely, steel material is easy to get rust so it is limited to use for outdoor application or requires further expensive treatments if in need.