Home / Products / Nickel Alloys / UNS N08825 Alloy Incoloy 825 Tubing Seamless For Oil And Gas
Quality UNS N08825 Alloy Incoloy 825 Tubing Seamless For Oil And Gas factory
Quality UNS N08825 Alloy Incoloy 825 Tubing Seamless For Oil And Gas factory

UNS N08825 Alloy Incoloy 825 Tubing Seamless For Oil And Gas

Basic Properties
Place of Origin: MADE IN CHAINA
Brand Name: Baosteel，TISCO
Certification: EN 10204 Type 3.1 / 3.2 available
Model Number: Incoloy 800 / Incoloy 800H / Incoloy 800HT / Incoloy 825 / Hastelloy C-276 / Hastelloy C-22 / Inconel 625 / Inconel 718
Trading Properties
Minimum Order Quantity: 100kg
Price: Negotiable (Request a Quote)
Payment Terms: T/T，D/P，D/A，Western Union，PayPal
Supply Ability: 10000tons
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UNS N08825 Incoloy 825 Tubing

Incoloy 825 Tubing Seamless
Product Summary
UNS N08825 is a nickel-iron-chromium alloy with significant additions of molybdenum, copper, and titanium. This austenitic nickel-iron-chromium alloy is specifically designed to provide exceptional resistance to both reducing and oxidizing acids, as well as stress-corrosion cracking and pitting in ...

Product Details

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UNS N08825 Incoloy 825 Tubing

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Incoloy 825 Tubing Seamless
Country Of Origin: MADE IN CHAINA
Brand: Baosteel，TISCO
Certifications: ISO/EN 10204 Type 3.1 / 3.2 Available
Grade: Incoloy 800 / Incoloy 800H / Incoloy 800HT / Incoloy 825 / Hastelloy C-276 / Hastelloy C-22 / Inconel 625 / Inconel 718
MOQ: 100kg
Price: Negotiable (Request A Quote)
Packaging: Wooden Case / Wooden Pallet / Steel Frame / Carton / Woven Bag
Delivery Time: 15-25days
Payment Terms: T/T，D/P，D/A，Western Union，PayPal
Supply Capacity: 10000tons
Product Description

UNS N08825 is a nickel-iron-chromium alloy with significant additions of molybdenum, copper, and titanium. This austenitic nickel-iron-chromium alloy is specifically designed to provide exceptional resistance to both reducing and oxidizing acids, as well as stress-corrosion cracking and pitting in chloride-containing environments.
What sets UNS N08825 apart is its stabilized structure – the addition of titanium prevents intergranular corrosion after welding, making it suitable for fabricated equipment without post-weld heat treatment. The alloy also contains copper, which provides outstanding resistance to sulfuric and phosphoric acids. UNS N08825 maintains excellent mechanical properties from cryogenic temperatures up to 540°C (1000°F).

Specifications & Dimensions
ParameterDetails
StandardASTM B423 (Seamless Tube), ASTM B163 (Heat Exchanger Tube), ASTM B424 (Plate/Sheet), ASME SB423
Grade / UNSIncoloy 825 / UNS N08825 / W.Nr. 2.4858
TypeSeamless tube / Welded tube (ERW / EFW)
Outer Diameter6.0 mm – 610 mm (1/8″ – 24″)
Wall Thickness0.5 mm – 50 mm (SCH 5S – XXS)
Length6 m / 9 m / 12 m, or random lengths
ProcessCold drawn / Cold rolled (seamless); Plate rolled (welded)
FinishAnnealed & pickled / Bright annealed
EndsPlain end / Beveled end / Threaded
PackagingHexagonal bundles + plastic end caps + seaworthy wooden crates or pallets
Chemical Composition

The chemical composition of UNS N08825 complies with ASTM B425, B424, and B423 standards.

ElementContent (%)Role
Nickel (Ni)38.0 – 46.0Provides SCC resistance and austenitic stability
Iron (Fe)≥ 22.0 (balance)Base element
Chromium (Cr)19.5 – 23.5Enhances oxidation and corrosion resistance
Molybdenum (Mo)2.5 – 3.5Improves pitting and crevice corrosion resistance
Copper (Cu)1.5 – 3.0Provides resistance to reducing acids (sulfuric/phosphoric)
Titanium (Ti)0.6 – 1.2Stabilizes against intergranular attack
Carbon (C)≤ 0.05Minimized to prevent sensitization
Manganese (Mn)≤ 1.00Aids in hot workability
Silicon (Si)≤ 0.50Improves oxidation resistance
Aluminum (Al)≤ 0.20Deoxidizer
Sulfur (S)≤ 0.03Controlled for hot workability
Phosphorus (P)≤ 0.03Minimized to maintain ductility
Mechanical Properties

Room Temperature Properties (Annealed Condition)

PropertyMetric (MPa)Imperial (ksi)
Tensile Strength (Rm)≥ 586≥ 85
Yield Strength 0.2% Proof (Rp0.2)≥ 241≥ 35
Elongation (A)≥ 30%≥ 30%
Density8.14 g/cm³0.294 lb/in³
Melting Point1370 – 1400°C2500 – 2550°F
Modulus of Elasticity196 GPa28.4 x 10³ ksi
Corrosion Resistance Highlights
EnvironmentPerformance
Sulfuric acid (H₂SO₄)Excellent – up to 40% concentration at boiling
Phosphoric acid (H₃PO₄)Excellent – industry standard for fertilizer production
Nitric acid (HNO₃)Good to excellent
Hydrochloric acid (HCl)Good in dilute concentrations (<10%)
Organic acidsExcellent (acetic, formic, citric)
Chlorides (NaCl)Good pitting resistance; excellent SCC resistance
SeawaterModerate – good for many applications
Caustic solutionsGood
Weldability

UNS N08825 offers good weldability with important advantages:

PropertyDetail
Post-weld heat treatmentNot required for corrosion resistance (titanium stabilized)
Sensitization riskVery low – titanium prevents carbide precipitation
Recommended methodsTIG, MIG, SMAW, SAW
Filler metalMatching UNS N08825 filler (ERNiCrMo-3 or ENiCrMo-3)
PreheatingGenerally not required
Interpass temperatureMaintain below 150°C (300°F)
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