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Incoloy 825 tubing (UNS N08825) is a nickel-iron-chromium alloy with molybdenum and copper additions, specifically engineered for superior corrosion resistance. The alloy's composition includes
Material Composition and Properties
Incoloy 825 tubing (UNS N08825) is a nickel-iron-chromium alloy with molybdenum and copper additions, specifically engineered for superior corrosion resistance. The alloy's composition includes:
Nickel (38-46%) for general corrosion resistance
Chromium (19.5-23.5%) for oxidation resistance
Molybdenum (2.5-3.5%) for pitting/crevice corrosion resistance
Copper (1.5-3.0%) for sulfuric acid resistance
Key material characteristics:
PREN (Pitting Resistance Equivalent Number) >30
Excellent resistance to stress corrosion cracking
Good mechanical properties from cryogenic to elevated temperatures
Maintains corrosion resistance in welded condition
Size Range | |
Wire | 0.5-7.5mm |
Rod / bar | 8.0-200mm |
strip | (0.5-2.5)*(5-180)mm |
Tube | Custom made |
Plate | Custom made |
Primary Industrial Applications
Chemical Processing Industry
Sulfuric and phosphoric acid production equipment
Pickling and acid cleaning systems
Chemical processing reactors and vessels
Acid storage and transportation systems
Marine and Offshore Applications
Seawater cooling and heat exchanger systems
Offshore platform components
Desalination plant equipment
Marine exhaust systems
Oil and Gas Sector
Sour gas processing equipment
Downhole tubing in corrosive wells
Flue gas desulfurization systems
Pipeline components in corrosive environments
Industry Trends and Market Drivers
Chemical Industry Expansion
Growing global demand for specialty chemicals
Increasing capacity in Asia-Pacific region
Need for materials with longer service life
Marine Environment Challenges
Rising corrosion problems in offshore structures
Increasing seawater temperatures accelerating corrosion rates
Expansion of desalination projects worldwide
Environmental Regulations
Stricter emissions control requirements
Need for reliable materials in flue gas cleaning
Reduced tolerance for chemical leaks
Technical Advantages Over Competing Materials
Superior to 316L stainless steel in chloride environments
More cost-effective than nickel alloys like Hastelloy C-276
Better fabricability than duplex stainless steels
More established track record than newer alloy alternatives
Future Market Outlook
The Incoloy 825 tubing market is projected to grow due to:
Increasing chemical production in emerging economies
Expansion of offshore oil and gas activities
Growing need for corrosion-resistant materials
Replacement of aging infrastructure
Standards Compliance
ASTM B423/ASME SB423 (Seamless pipe and tube)
NACE MR0175/ISO 15156 (Sour service)
EN 10216-5 (European standard)
ASME B31.3 (Process piping)
Parameter
Item | 800 | 800H | 800HT | 825 | 925 |
C | ≤0.1 | 0.05-0.1 | 0.06-0.1 | ≤0.05 | ≤0.03 |
Mn | ≤1.5 | ≤1.5 | ≤1.5 | ≤1 | ≤1 |
Fe | rest | rest | rest | rest | rest |
P | -- | -- | -- | ≤0.02 | ≤0.03 |
S | ≤0.015 | ≤0.015 | ≤0.015 | ≤0.03 | ≤0.03 |
Si | ≤1 | ≤1 | ≤1 | ≤0.5 | ≤0.5 |
Cu | ≤0.75 | ≤0.75 | ≤0.75 | 1.5-3 | 1.5-3 |
Ni | 30-35 | 30-35 | 30-35 | 38-46 | 42-46 |
Al | 0.15-0.6 | 0.15-0.6 | 0.15-0.6 | 0.2-1 | 0.15-0.5 |
Ti | 0.15-0.6 | 0.15-0.6 | 0.15-0.6 | 0.6-1.2 | 1.9-2.4 |
Cr | 19-23 | 19-23 | 19-23 | 19.5-23.5 | 19.5-23.5 |
Mo | -- | -- | -- | 2.5-3.5 | 2.5-3.5 |
For more details, pls directly contact us.
E-mail: dzx@dlx-alloy.com
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Tel: 0086-19906119641
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