Good Stress Corrosion Cracking Resistance Of Incoloy 825 Seamless Pipe
Apr 25, 2022| Incoloy 825 is a titanium-stabilized fully austenitic nickel-iron-chromium alloy with additions of copper and molybdenum. Incoloy 825 is a general purpose engineering alloy that is resistant to acid and alkali metal corrosion in both oxidizing and reducing environments.
The high nickel content makes the alloy effective against stress corrosion cracking. It has good corrosion resistance in various media, such as sulfuric acid, phosphoric acid, nitric acid and organic acids, and alkali metals such as sodium hydroxide, potassium hydroxide and hydrochloric acid solutions. The higher comprehensive performance of Incoloy 825 is manifested in nuclear combustion dissolvers with various corrosive media, such as sulfuric acid, nitric acid and sodium hydroxide, which are all processed in the same equipment.
Incoloy 825 is suitable for welding with the same material or other metals by any conventional welding process, such as tungsten electrode inert gas welding, plasma arc welding, manual argon arc welding, metal inert gas welding, MIG welding, where pulsed Arc welding is the preferred solution. When using manual argon arc welding, it is recommended to use a shielding gas mixed with various components (Ar+He+H2+CO2).
Welding of Incoloy 825 must be done in the annealed condition and cleaned with a stainless steel wire brush to remove stains, dust and various markings. When welding the root of the weld, for the best quality of the root weld, the operation must be very careful (argon 99.99) so that the weld does not produce oxides after the root is welded. Color from the weld heat-affected zone should be removed with a stainless steel brush while the weld area is not cool.
●Good resistance to stress corrosion cracking
●Good resistance to pitting and crevice corrosion
●Good anti-oxidative and non-oxidative thermal acid properties
●Good mechanical properties at room temperature and high temperature up to 550℃
●Approved for pressure vessels with manufacturing temperature up to 450℃