Ferritic stainless steel

Ferritic stainless steels are a family of stainless steels with a body-centered cubic (BCC) crystal structure and composed primarily of iron and chromium. They are characterized by being magnetic, non-hardenable by heat treating, and having excellent resistance to stress-corrosion cracking (SCC). Ferritic stainless steel alloys are designated as part of the 400-series of stainless steels in the SAE steel grades numbering system. By comparison with austenitic stainless steels, these are less hardenable by cold working and less weldable, but more cost-effective due to the lower nickel content.