Is Corten steel harder than mild steel Our Mild Steel
What is Corten steel?
We have found that over time if left unsealed Corten develops a more unique colouring and better appearance as to the mild steel. Mild Steel is more economical and once sealed will retain a rusted effect with natural character. called Penetrol. This seas the rust retaining the colour and appearance.Also known as Cor-Ten, it is a brand of weathering steel, in which the surface rust layer protects the steel beneath from further degradation, this gives Corten an increased life in comparison to mild steel. Our Corten steel edging will weather to brown in around a month depending on the conditions.
Corten is known as”Weathering steel” ,it refers to the chemical composition of these steels, allowing them to exhibit increased resistance to atmospheric corrosion compared to other steels. Shiny ‘s fire pits ball and Fire pits bowl is made from mild steel (carbon steel).
One may also ask, what does Corten steel cost? We started out by mentioning that the reported price of Corten steel is $2.50 to $3 per square foot. You can often find 32 square feet panels starting at $70 or so, which in fact comes in at slightly under $2.5 per square foot.
Secondly, what type of steel is Corten?
Corten steel (often referred to as Cor–Ten) is a weather resistant steel which could more accurately be termed as an “Atmospheric Corrosion Resistant Steel”. It is a copper chromium alloy steel – this alloy displays a greater level of resistance to atmospheric weathering when compared to other unalloyed steels.
How strong is Corten steel?
It is this combination that creates the easy rusting properties and gives Corten Steel its recognisable look. It is produced in a sheet form which is usually only ¼ inch thick. However, despite the thin nature, Corten Steel is a strong and durable material. While Corten was initially designed for use in more industrial settings it became popular with architects and artists and from here it found its way into gardens.
Our Mild Steel edging
This will also form a rust layer and to some extent this too protects the steel below but degradation is faster. That said the process is still extremely slow, it’s hard to say exactly as the conditions play a big part but in a fairly aggressive situation degradation will be around 10 microns per year (0.01mm) taking roughly 50 years to degrade just 1mm! So even our 3mm thick mild steel edging has great longevity let alone our 6mm thick option!Mild steel edging will take longer weather to brown in comparison to Corten, in average conditions this is around 10 months.
Do they look the same?
We are often asked for Corten edging as clients are looking for the weathered look for which the Corten brand has become synonymous. However both mild and Corten steel take on this patina. It would take a keen eye to tell the two apart once weathered.
Corten has a slightly lighter more orange appearance largely due to the copper content but both mild steel and Corten develop the lovely warm, varied brown tones.
Your edging will arrive largely un weathered, mild steel starts off slightly darker whereas Corten will be a bit more metallic and shiny.
Weathering times of both our mild steel and Corten edging can be reduced with one of the rust accelerators available online or simply a regular application of a salt, vinegar and water solution, or to accelerate even faster add Hydrogen peroxide (3% food grade is enough, available on Amazon).
We tend to be conservative with a weak solution using – 2 cups of peroxide, 4 tablespoons of vinegar and salt mixed in 2 litres of water. There is no need to go any stronger. This solution can be painted, wiped or sprayed on.
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