Bar/Rod/Wire/Forging/Plate/Strip N08825/Incoloy Alloy 825/NS142/NiCr21Mo/2.4858

Product Specification

Bar/Rod/Wire/Forging/Plate/Strip N08825/Incoloy Alloy 825/NS142/NiCr21Mo/2.4858/NCF 825 
 For Nuclear Industries

INCOLOY® 825 (UNS N08825 / W.Nr. 2.4858 / NS142 / NiCr21Mo / NCF 825) is a nickel-iron-chromium alloy with added molybdenum, copper, and titanium, offering excellent resistance to corrosion in acidic and seawater environments. Available in bar, rod, wire, forging, plate, and strip, it is widely used in chemical processing, marine engineering, pollution control, and nuclear fuel reprocessing. The alloy resists pitting, crevice corrosion, and stress corrosion cracking, making it ideal for heat exchangers, piping, tanks, and offshore applications. It meets ASTM B425 and ASME SB-425 standards. With a balance of strength and corrosion resistance, INCOLOY 825 is a reliable material for demanding industries requiring durability in harsh conditions.

Trade Code

INCOLOY® 825 (UNS N08825 / W.Nr. 2.4858 / NS142 / NiCr21Mo / NCF 825) is a highly corrosion-resistant nickel-iron-chromium alloy with molybdenum, copper, and titanium additions. It is widely used in harsh environments due to its excellent resistance to oxidation, pitting, crevice corrosion, and stress corrosion cracking.

Key Features of INCOLOY 825

1. Exceptional Corrosion Resistance

• Resistant to both oxidizing and reducing environments.
• Excellent resistance to sulfuric, phosphoric, nitric, and organic acids.
• Highly resistant to chloride-induced stress corrosion cracking (SCC).
• Good performance in seawater and brine solutions.

2. High Temperature and Oxidation Resistance

• Maintains mechanical integrity and corrosion resistance up to 540°C (1000°F).
• Oxidation-resistant in moderate temperatures.

3. Superior Mechanical Properties

• High tensile and yield strength with good ductility.
• Retains strength in both room and elevated temperatures.
• Excellent fabricability – can be easily welded, hot/cold worked, and machined.

4. Weldability and Formability

• Easily welded by TIG, MIG, and submerged arc welding.
• Good cold and hot working characteristics.

Key Applications

1. Chemical Processing Industry

• Heat exchangers, tanks, and reactors handling sulfuric acid, phosphoric acid, nitric acid, and organic acids.
• Acid production plants, especially for sulfuric and phosphoric acid.
• Piping systems in highly corrosive environments.

2. Marine and Offshore Engineering

• Components exposed to seawater, brine, and high chloride environments.
• Heat exchangers and piping for desalination plants.
• Marine exhaust ducts and structural components in offshore oil rigs.

3. Oil and Gas Industry

• Downhole tubing, casing, and heat exchangers in sour gas wells.
• Equipment for handling H₂S (hydrogen sulfide), CO₂, and chlorides.
• Piping and process equipment for natural gas production and refining.

4. Nuclear and Power Generation

• Fuel reprocessing systems, heat exchangers, and piping.
• Nuclear waste storage and transport containers.
• Components exposed to radioactive and corrosive environments.

5. Aerospace Industry

• Exhaust ducts and heat exchangers for aircraft and jet engines.
• Components in chemical processing systems on spacecraft.

6. Pollution Control Equipment

• Flue gas scrubbers and waste treatment plants.
• Stack liners and ducts for acidic gas removal.

Why Choose INCOLOY 825?

✅ Excellent resistance to oxidizing and reducing acids
✅ High resistance to stress corrosion cracking
✅ Good mechanical properties at elevated temperatures
✅ Superior resistance to pitting and crevice corrosion