Incoloy 825 (UNS N08825) Nickel Alloy Plates : Ideal for Sulfuric Acid Digesters, Pickling Baskets, Marine Exhausts, and NACE-Compliant Sour Service Equipment

Incoloy 825 (UNS N08825) Nickel Alloy Plates

UNS N08825 Incoloy 825 plate is a titanium-stabilized nickel-iron-chromium alloy with molybdenum and copper additions. It offers excellent corrosion resistance in reducing acids, chloride media and sour gas environments, combined with reliable weldability and formability for corrosive process equipment fabrication. It is particularly suitable for acid service vessels, flue gas desulfurization scrubbers and offshore corrosion-resistant assemblies.

Incoloy 825 plate is widely used in sulfuric acid digesters, pickling baskets, marine exhausts, separators, heat exchangers, and other process components requiring NACE-compliant sour corrosion resistance.

Key Features and Advantages

• Titanium stabilization prevents intergranular corrosion after welding.

• Molybdenum and copper additions deliver strong resistance to pitting, crevice corrosion and chloride stress corrosion cracking.

• Qualified to NACE MR0175 / ISO 15156-3 for sour gas (H₂S) service.

• Good ductility, formability and excellent weldability.

• Stable mechanical properties over a wide working temperature range.

Typical Applications

• Sulfuric acid digesters and phosphoric acid evaporators for fertilizer industry.

• Pickling baskets and internal components of steel pickling lines.

• Marine exhaust systems and offshore platform process equipment.

• Sour oil & gas separators, wellhead manifolds and process skids (NACE sour service).

• Chemical reactors, acid storage tanks and industrial wastewater treatment vessels.

Technical Specifications

• Product Name: Incoloy 825 Nickel Alloy Plate

• Material Designation: UNS N08825

• Alloy Family: Nickel-Iron-Chromium Alloy

• Product Form: Plate / Sheet

• Reference Standard: ASTM B424, subject to confirmation of product applicability and delivery requirements

• Thickness: Available according to manufacturing capability and customer requirements

• Size & Dimension: Standard or custom cut sizes, subject to availability

• Surface Condition: As agreed in the purchase specification

• Inspection Documents: Material test certificates and inspection reports, as agreed

Quality Assurance

Products can be supplied according to agreed specifications, with chemical composition verification, mechanical testing, dimensional inspection, surface examination, corrosion check and material traceability where required.

Material test certificates and additional inspection documentation are available according to the purchase order and applicable product requirements.

Contact our sales team today for a competitive quote, technical datasheet, or to discuss your custom forging requirements.