What is CorTen steel?
COR-rosion resistance: corrosion resistance
TEN-sile strength: tensile strength
Developed by US Steel with the aim of creating weatherproof steel. It is a metal alloy consisting of iron to which copper, silicon, nickel and chromium have been added.
CorTen steel properties
Characteristic of CorTenstaal is the brown-orange rust color and the long lifespan.
Through the addition of the other metals to the iron, CorTen steel develops a solid layer of rust, the oxide skin, which shields the deeper material from oxygen. In contrast to ordinary steel, corrosion is not a wear, but rather a protection of the steel.
The solid rust layer that has to develop will, depending on the weather, take 2 to 6 months. After this, the CorTen no longer delivers rust (water).