Shipping containers are primarily made from maritime-grade corten steel, also known as ‘weathering steel’. Corten steel is an alloy, meaning it is a combination of steel and other metals. This material is specifically chosen for its durability and ability to withstand harsh weather conditions.

At their core, shipping containers are crafted from high-quality steel known as "Cor-ten steel. This is a type of weathering steel that's built to withstand harsh climate conditions and resist corrosion over time. It's essentially the superhero of steels when it comes to durability and strength.

Shipping containers have to be incredibly durable. They need to withstand extreme weather conditions at sea in order to protect their cargo. Most shipping containers are made from maritime-grade corten steel, sometimes referred to as ‘weathering steel’.