BÖHLER L825

BÖHLER L825 (UNS N08825) is an austenitic nickel-iron-chromium alloy with additions of molybdenum, copper and titanium with exceptional resistance to many corrosive environments. The nickel content of BÖHLER L825 promotes resistance to chloride stress corrosion and, in combination with molybdenum and copper, offers significantly better corrosion resistance in reducing environments than conventional austenitic stainless steels. The chromium and molybdenum content provides resistance to pitting by chlorides as well as resistance to a wide range of oxidising atmospheres. The addition of titanium prevents sensitisation in the welded state and increases resistance to intergranular corrosion.
The material can be used in a variety of process environments, including sulphuric, sulphuric, phosphoric, nitric, hydrofluoric and organic acids and alkalis such as sodium or potassium hydroxide and acidic chloride solutions.
BÖHLER L825 can be easily formed and welded using a variety of techniques. BÖHLER L825 exhibits good toughness in continuous operation up to temperatures of around 550 °C and is suitable for pressure vessels with wall temperatures of up to 538 °C.