400 Series SS Sheets, Plates, Coils, Patta, Patti

The 400 series group of stainless steels has an 11 percent chromium and 1-percent manganese increase, above the 300 series group. The 400 series is susceptible to rust and corrosion under some conditions. Heat-treating will harden the 400 series. The 400 series of stainless steels have higher carbon content, giving it a martensitic crystalline structure. This provides high strength and high wear resistance. Martensitic stainless steels aren’t as corrosion resistant as the austenitic types.

The 400 series includes both ferritic and martensitic steels.

Ferritic steels:non-hardening steels, ideal for conditions in elevated temperatures. Typical applications for ferritic stainless steels include petrochemical, automotive exhaust systems, heat exchanges, furnaces, appliances and food equipment to name a few.

Martensitic steels:able to be hardened, ideal for a wide variety of common uses.Martensitic stainless steels are used extensively in cutlery, sport knives and multi-purpose tools.