Incoloy 825 alloy products
Material Family / Incoloy

Incoloy 825

Ni-Fe-Cr-Mo-Cu alloy with exceptional resistance to sulfuric and phosphoric acid corrosion.

Introduction

§01 — General

Incoloy 825 is a nickel-iron-chromium alloy with additions of molybdenum, copper and titanium for exceptional corrosion resistance in reducing and oxidizing acids. It is the standard material for sulfuric acid coolers, phosphoric acid evaporators and chemical processing equipment handling mixed acid streams.

Cross-Reference

UNS: UNS N08825
GB/T: GB NS1402
Series: Incoloy
Density: 8.14 g/cm³
Max Temp: 540°C
Standards: ASTM B163 · ASTM B423 · ASTM B424 · NACE MR0175

Quick Facts

UNS
N08825
GB
NS1402
Density
8.14 g/cm³
Max Service Temp
540°C
Series
Incoloy

Available Product Forms

§02 — Forms
ForgingWireFlangeBar & RodPlate & SheetStripPipe & Tube

Key Characteristics

§03 — Features
Outstanding sulfuric acid resistance
Resistant to phosphoric acid
Molybdenum + copper for pitting resistance
Titanium stabilized for intergranular corrosion
NACE sour service qualified

Typical Uses

§04 — Applications
Sulfuric acid coolers
Phosphoric acid evaporators
Chemical reactor vessels
Pickling tank heating coils
Offshore production piping

Frequently Asked Questions

Incoloy 825 FAQ

What is Incoloy 825 used for?

Incoloy 825 is a Incoloy alloy used in Sulfuric acid coolers, Phosphoric acid evaporators, Chemical reactor vessels. It offers Outstanding sulfuric acid resistance and Resistant to phosphoric acid.

What is the chemical composition of Incoloy 825?

Incoloy 825 is a controlled-composition Incoloy alloy supplied to ASTM B163 and ASTM B423. We provide the full mill test certificate with heat-specific chemistry on request.

What forms is Incoloy 825 available in?

Incoloy 825 is regularly supplied in Forging, Wire, Flange, Bar & Rod, Plate & Sheet, Strip, Pipe & Tube. Custom forms and dimensions available on request.

What is the maximum service temperature of Incoloy 825?

Incoloy 825 is rated for service up to 540°C. Contact our metallurgy team for specific application recommendations.

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