What is Incoloy 825 material?

Incoloy 825 (UNS N08825) – Overview

Incoloy 825 is a nickel-iron-chromium alloy with significant additions of molybdenum, copper, and titanium. It is designed for exceptional resistance to corrosion, particularly in acidic and high-temperature environments. This alloy is widely used in industries requiring protection against pitting, crevice corrosion, stress corrosion cracking (SCC), and oxidation.

Key Properties of Incoloy 825:

✔ Superior Corrosion Resistance – Excellent resistance to sulfuric acid, phosphoric acid, nitric acid, and organic acids.
✔ High-Temperature Strength – Can withstand temperatures up to 540°C (1000°F).
✔ Resistant to Stress Corrosion Cracking (SCC) – Performs well in chloride and acidic conditions.
✔ Good Weldability – Can be welded using standard welding techniques.
✔ Oxidation Resistance – Maintains structural integrity in oxidizing and reducing environments.

Is alloy 825 stainless steel?

Alloy 825 is a nickel-based alloy, which means that the largest element present is nickel at 38-46% of the total. It also contains iron, chromium and molybdenum, but at lower proportions.

A stainless steel is a type of steel that resists corrosion. The composition of a steel product is based upon iron, and a stainless steel needs at least 11.5% chromium in order to resist general corrosion. Increasing the level of chromium will increase the resistance to corrosion, whilst additions of nickel, molybdenum and other elements will improve mechanical properties and corrosion resistance further.

Why is Alloy 825 Not Considered Stainless Steel?

Higher Nickel Content – Stainless steels have lower nickel content (typically 10-25%), whereas Alloy 825 has 38-46% nickel, classifying it as a nickel-based alloy.

Superior Corrosion Resistance – Alloy 825 resists strong acids, chloride stress corrosion cracking, and seawater, far better than most stainless steels.

Different Industry Use – Stainless steels are used in general structural and industrial applications, while Alloy 825 is used in extreme environments (chemicals, acids, and high heat).

Nickel Alloy 825 Tubing Material Specification

Chemical Composition of Incoloy Alloy 825 Tube

Nickel Alloy 825 Tube Mechanical Properties

Inconel 825 Tube Equivalent

What is the difference between Incoloy 825 and ss316?

1. Chemical Composition

Key Difference: Incoloy 825 has a higher nickel content, along with copper and titanium, which SS316 lacks.

2. Corrosion Resistance

Incoloy 825 is a nickel-iron-chromium alloy with additional molybdenum, copper, and titanium. It resists various corrosive media such as sulfuric acid, phosphoric acid, and seawater. Moreover, it is resistant to stress corrosion cracking and pitting corrosion. On the other hand, SS316 is a stainless steel alloy containing molybdenum, enhancing its corrosion resistance. It is particularly suited for applications involving acetic acid, sulfuric acid, and hydrochloric acid. However, it is vulnerable to pitting corrosion in chloride environments.

3. Strength & Temperature Resistance

Key Difference: Incoloy 825 is stronger and performs better in extreme chemical conditions, while SS316 handles higher dry-air temperatures better.

4.Which One Should You Choose?

✅ Choose Incoloy 825 if you need:
✔ Superior corrosion resistance (especially in acidic and chloride-rich environments)
✔ High strength and stress corrosion cracking resistance
✔ Performance in aggressive chemical processing, marine, or oil & gas industries

✅ Choose SS316 if you need:
✔ Good corrosion resistance for general applications
✔ Easier welding, machining, and fabrication
✔ A cost-effective material for standard marine, food, and pharmaceutical industries

UNS N08825 Pipe and Tube Dimension

Nickel 825 Tubing Wall Thickness & Outer Diameter

Is Inconel and Incoloy the same?

No, Inconel and Incoloy are not the same. While both are nickel-based alloys produced by Special Metals Corporation, they have distinct compositions, properties, and applications.

When to Use Inconel vs. Incoloy?

✅ Use Inconel if you need:
✔ Extreme heat resistance (e.g., aerospace, jet engines, heat exchangers)
✔ Superior corrosion resistance (e.g., seawater, nuclear, and chemical plants)
✔ High strength in aggressive environments

✅ Use Incoloy if you need:
✔ Good corrosion resistance at moderate temperatures
✔ More cost-effective alternative to Inconel
✔ Strong material for chemical and marine applications

Incoloy 825 Material Testing

Flattening Test

Pitting Resistance Test

Intergranular Corrosion (IGC) Test

Mechanical Testing Such as Tensile of Area

Positive Material Identification – PMI Testing

Hardness Test

Micro and MacroTest

Chemical Analysis – Spectro Analysis

Flaring Test

What is Incoloy used for?

1. Chemical Processing Industry  🏭

✔ Used in heat exchangers, piping, reactors, and tanks

✔ Resists sulfuric acid, phosphoric acid, and nitric acid

✔ Handles highly corrosive solutions

2. Marine & Offshore Industries   🌊

✔ Piping and heat exchangers in seawater environments  

✔ Offshore oil platforms and shipbuilding  

✔ Resistant to chloride stress corrosion cracking  

3. Oil & Gas Industry ⛽  

✔ Used in downhole tubing, sour gas pipelines, and wellhead components  

✔ Withstands high-pressure, high-temperature (HPHT) environments  

✔ Excellent resistance to sulfur-containing environments

4. Power Generation & Nuclear Industry⚡  

✔ Components in nuclear reactors, steam generators, and boiler tubing

✔ Handles radiation and extreme thermal conditions  

✔ Maintains mechanical strength in high temperatures  

5. Aerospace & Automotive ✈🚗

✔ Jet engine exhaust systems and heat shields  

✔ Turbocharger components in performance vehicles  

✔ Resists oxidation and carburization at high temperatures  

6. Pollution Control & Environmental Protection 🌿

✔ Used in scrubber systems, flue-gas desulfurization (FGD) units, and ducting  

✔ Withstands acidic and high-temperature gases  

Incoloy 825 Products

Steel Sheet

Steel Plate

Bars

Pipe & Tube (welded & seamless)

Pipe Fittings

Elbows, tees, stub-ends, returns, caps, crosses, reducers, pipe nipples. etc.

You can get an offer for products in below material forms:

-Pipe and Tube (EN 10216-5, ASTM A213, ASTM A249, A312, A790,)

-Forged Fitting and Flange (ASTM A182 , ASTM A105,ASTM B564 )

-Butt Weld Fittings (ASTM A234, ASTM A403,ASTM A815)

-Round bar , Billet (ASTM A276, ASTM A479)

– Plate, Sheet, Strip(ASTM A240, EN 10028-7, A480)

-Bolting, Nuts（ASTM A193, A194, A320）

Incoloy 825 Tubing Exported Countries

We Export Incoloy 825 Tubing to Saudi Arabia, United Arab Emirates, Qatar, Bahrain, Oman, Kuwait, Turkey, Egypt, Yemen , Syria, Jordan, Cyprus, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan, Sri Lanka, Maldives, Bangladesh, Cambodia, Argentina, Bolivia, Brazil, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, United States Of America, Canada, Mexico, Panama, Jamaica, Bahamas, Denmark, Norway, Germany, France,Italy, United Kingdom, Spain, Belgium, Greece, Czech Republic, Portugal, Hungary, Albania, Austria, Finland, Ireland, Croatia, Malta, Nigeria, Algeria, Angola, South Africa, Libya, Egypt, Sudan,  Europe, Africa, Asia, North America, South America, Middle East.etc

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