Austenitic vs Martensitic Stainless Steel 🔥 Visit weldfabworld.com Stainless steels are a family of iron–chromium alloys known for their outstanding corrosion resistance. Among them, Austenitic (300-series) and Martensitic (400-series) stainless steels are the two most widely used families—each with distinct features, applications, and trade-offs. 🔍Austenitic Stainless Steel (300-Series) Definition 🔹 Contains high levels of Chromium (16–26%) and Nickel (8–22%) with an FCC structure → non-hard