Stainless steel is one of the most commonly used materials in the world, found in everything from kitchen sinks to skyscrapers. It is strong, shiny and resistant to rust, which makes it a favourite in industries like construction and food production. Here we’ll explain what stainless steel is and why it’s so useful.
What Is Stainless Steel?
Stainless steel is a type of metal made by combining iron with other elements, most importantly chromium. To be considered “stainless,” the steel must contain at least 10.5% chromium. This chromium creates a thin layer on the surface of the metal that protects it from rust and stains, even when it is exposed to moisture. Elements like nickel, molybdenum, or titanium are added to give it extra strength or resistance to heat and chemicals.
How Is Stainless Steel Made?
Stainless steel is made in large furnaces where iron and other metals are melted together at very high temperatures. To reduce the carbon content, steelmakers use a process called decarburisation in a furnace, where gases like oxygen or argon are blown into the molten metal. These gases react with the carbon and carry it away, usually turning it into carbon dioxide or carbon monoxide, which then escapes as gas.
Once the mix is melted, it is cooled into solid shapes like blocks or slabs. These are then rolled into thinner pieces using sheet metal fabrication. Sheet metal, like that found at //dkmsheetmetal.co.uk/, might have gone through several treatments to make it harder, shinier, or better for a specific job.
Types of Stainless Steel
There are several types of stainless steel, and each one has different properties based on how much chromium, nickel, or other metals it contains. The most common type is called 304 stainless steel. It is used in kitchen equipment, food processing, and sinks because it doesn’t rust and is easy to clean. Another type, called 316 stainless steel, has extra molybdenum, which makes it better for use in saltwater or environments where there are chemicals. Some types are even magnetic, while others are not, depending on how they are made.