Incoloy 825

Aurico Alloys LLP supplies Incoloy 825 as sheet, plate, foil, round bar and wire, from Mumbai, India, with EN 10204 3.1 mill test certificates.

Incoloy® 825 (UNS N08825, W.Nr. 2.4858) is a nickel–iron–chromium alloy with molybdenum, copper and titanium added — molybdenum 2.5-3.5%, copper 1.5-3.0% and titanium 0.6-1.2%. The molybdenum and copper are what give it resistance to sulphuric and phosphoric acids, and the titanium stabilises it against sensitisation when welded.

Key Properties

• Molybdenum 2.5-3.5% with copper 1.5-3.0% — the pair is what makes it a sulphuric and phosphoric acid alloy rather than a general-purpose one.
• Nickel 38-46%, chromium 19.5-23.5%, giving resistance in reducing and oxidising conditions alike.
• Titanium 0.6-1.2% stabilises against intergranular attack in the weld heat-affected zone.
• Incoloy 925 is the age-hardenable version of this same corrosion chemistry.

Applications

• Pickling tank heaters and equipment
• Phosphoric acid evaporators
• Chemical process piping and vessels
• Oil and gas production hardware

Incoloy 825 is excellent in pure phosphoric acid up to boiling 85% and in nitric acid up to boiling 65%, and in dilute sulphuric acid Special Metals ranks it ahead of Hastelloy C-276. Its limits, and the grades to move to when chlorides are present, are in our acid and alkali service guide.

Available Forms

• Incoloy 825 Wire
• Incoloy 825 Foil
• Incoloy 825 Round Bars
• Incoloy 825 Plates
• Incoloy 825 Sheets

Specifications by Product Form

Incoloy 825 (N08825) is supplied to a different standard in each form. Quote the one that matches the product you are ordering.

Contact us for stock availability and pricing.