SS 431, Type 431, WNR 1.4057, UNS S43100, AISI 431, …
Stainless Steel 431 is a martensitic stainless steel it is a heat-treatable grades with excellent corrosion resistance, high toughness, torque strength, and tensile properties. Its properties make them ideal for bolt and shaft applications. Grade 431 steels, are suitable for operations such as spinning, deep drawing, bending or cold heading.