21 / 02 / 2020

AISI 420

AISI 420 (UNS S42000) is a martensitic stainless steel with 12% Chromium  which is sufficient to give good corrosive resistance properties. It’s best corrosive resistance is when hardened and surface is ground or polished.It has good ductility in the annealed condition but can be hardened up to 500HB (highest of the chromium grades). Martensitic grades are known for high hardness and allowances must be made for poor weldability and usually allowances for a final harden and temper treatment.