When people talk about Stainless steel, the first ideas came from the brain it maybe: “ oh ! Stainless steel ? A kind of material which was generally used in our daily life! ” besides, we knew nothing more about that.
Do you know what is stainless steel?
Do you know there are several grades in the stainless steel section?
So today, let’s get more basics information about ?this material
What is Stainless Steel?
Stainless steel is not just one thing. It is a term used for a group of iron-based alloys (a metal made by combining two or more metallic elements) that contain a minimum of 10.5% chromium. This combination with chromium is what gives stainless steel its resistance to corrosion. The chromium forms an ultra-thin layer on the steel that is referred to as the “passive layer.” This passive layer is the key to preventing rust and other corrosion.
In addition, the alloy can only have a maximum of 1.2% carbon to be considered stainless. Beyond that, the alloy can contain a number of other elements in varying amounts including nickel, silicon, manganese, titanium, molybdenum, nitrogen, niobium, and others.
Suffice it to say that stainless steel is a combination of metals and other elements. It is the different combinations of these materials that give rise to the different properties of stainless steel.
Grades of Stainless Explained
While gauge refers to the thickness, the grade of steel is a reference to its components and the properties of the steel that arise from using various components. To begin, there are 3 terms you should be familiar with:
Austenitic Steel is the most commonly used grade of stainless.It is considered easy to work with and is found in a wide variety of applications in a commercial kitchen.
Ferritic Steel is magnetic steel that has a low carbon content. It is not as strong or corrosion resistant as an austenitic grade. This is the second most commonly used grade of stainless steel.
Martensitic Steel is much less frequently seen in foodservice, this grade of steel is magnetic and is defined by its low level of nickel and a moderate level of carbon.
There is a potential 4th category worth mentioning called Duplex. Duplex stainless steels are a more recent addition to the family of stainless steels.
See ! when you get that basic information about stainless steel, you may become one of a steel expert in your life！ Last time, when you need to buy something made from stainless steel, you know what’s the best steel you need.