Stainless Steel Composition
Stainless steel is a composition of various elements to enhance corrosion resistance of steel. The main alloying component in all stainless steel metals is chromium (10.5% minimum).
The most common type of stainless steel is the austenitic stainless steel which features grades 304 and 316 stainless steels. This range is known for its high resistance to corrosion because of its high chromium content combined with nickel.
Ferritic stainless steel is the second most popular. It includes grade 430 stainless steels. While this range doesn’t match the corrosion resistance of austenitic steels, it’s a cost effective alternative and is often used in the catering industry.
Martensitic steels have low chromium content hence low corrosion resistance but, have high strength. Martensitic steels are ideal for applications that require incredible strength.
Below is a table detailing the chemical composition of some of the stainless steel grades that are supplied by thyssenkrupp Materials (UK).
All data is to EN110088-2
Maximum values are listed unless otherwise indicated