Product Forms
Your Current Location： Home >> Product Forms >> Tube/Pipe >> Incoloy
INCOLOY 825（UNSN08825） PIPE/TUBE
Nickel-Iron-Chromium-Molybdenum-Copper Alloy for Superior Acid and Chloride Corrosion Resistance
INCOLOY 825 pipe and tube are widely used for corrosion-resistant piping systems, heat exchanger tubing, scrubbers, and process lines in aggressive chemical environments. The alloy offers exceptional resistance to oxidizing and reducing media, outstanding resistance to pitting and crevice corrosion, and strong resistance to chloride stress corrosion cracking.
As a professional Chinese nickel-based alloy manufacturer, we supply INCOLOY 825 in multiple product forms with stable chemistry, consistent mechanical properties, and flexible dimensional customization for global industrial users.
Typical supply range (custom sizes and tolerances available upon request):
Item | Range / Options | Notes |
OD | 6 – 914 mm | OD range depends on seamless/welded; specify tolerance if critical. |
Wall Thickness | 0.7 – 20 mm | Wall thickness depends on OD and type; specify tolerance if critical. |
Length | Up to 12000 mm | Fixed length or random length by agreement. |
Type | Seamless / Welded | Seamless per ASTM B423; welded per ASTM B705/B626 on request. |
Surface finish | Pickled / Bright / Polished | Surface condition per specification and application. |
End | Plain / Beveled / Threaded | End preparation available for welding/installation. |
Delivery condition | Solution annealed (standard) | NDT/PMI/hydrotest available per project requirement. |
Dimension definition: OD × WT × LENGTH.
• Excellent resistance to sulfuric and phosphoric acids across wide concentration ranges
• Strong resistance to chloride stress corrosion cracking and crevice corrosion
• Good resistance to reducing and oxidizing media; performs well in mixed acid systems
• Molybdenum and copper enhance resistance to reducing acids and pitting environments
• Titanium stabilization improves resistance to intergranular corrosion after welding
• Good fabricability and weldability for chemical process equipment
Element | Ni | Cr | Mo | Fe | Cu | Mn | Si | C |
INCOLOY 825 | Balance | 20.0–22.5 | 12.5–14.5 | 2.0–6.0 | 2.5–3.5 | ≤0.50 | ≤0.08 | ≤0.015 |
Extremely low carbon and silicon help maintain corrosion resistance in as-welded structures.
Property | Value |
Tensile Strength (Rm) | ≥ 550 MPa |
Yield Strength (Rp0.2) | ≥ 220 MPa |
Elongation | ≥ 30 % |
Hardness | ≤ 90 HRB |
Mechanical properties may vary slightly with product form and heat treatment condition.
Standard System | Specification |
ASTM / ASME | ASTM B423 / ASME SB-423 |
EN | EN 10204 |
UNS | N06022 |
DIN | 2.4858 |
JIS | NW 6022 |
Item | Range |
OD | 6 – 914 mm |
Wall Thickness | 0.7 – 20 mm |
Length | Up to 12000 mm |
Type | Seamless / Welded |
End | Plain / Beveled / Threaded |
Custom sizes, tight tolerances, and cut-to-length service are available upon request.
• Solution Annealed
• Annealed & Pickled (where applicable)
• Chemical processing equipment, tanks, columns, heat exchangers and piping
• Sulfuric acid and phosphoric acid production, pickling and acid handling systems
• Oil and gas sour service components, offshore piping and marine hardware
• Pollution-control and FGD scrubbers, ducting and absorber internals
• Heat exchanger and condenser tubing, seawater/brine service (as applicable)
• Nuclear fuel reprocessing and high-corrosion environments
INCOLOY 825 can be fabricated and welded using standard nickel-alloy practices.
Common welding methods include:
• GTAW (TIG)
• GMAW (MIG)
• SMAW
Matching filler metals such as ERNiCrMo-3 are typically recommended.
• EN 10204 3.1 Material Test Certificate
• Chemical composition analysis
• Mechanical testing (tensile, hardness)
• PMI / XRF testing available
• Dimensional inspection
• Third-party inspection on request (BV, SGS, TUV, DNV)
• PVC protective film on surface (where applicable)
• Wooden pallets or export-grade crates
• Seaworthy packaging for long-distance shipment
• Global delivery by sea, air, or multimodal transport
• Professional nickel-based alloy manufacturer in China
• Stable raw material sourcing and melting control
• Wide stock and fast production cycle
• Competitive pricing for global projects
• Experience with international EPC, OEM, and distributors
For quotation or technical consultation, please provide:
• Required grade (INCOLOY 825)
• Diameter × Length
• Quantity
• Surface finish / delivery condition
• Application environment
Our technical team will respond with datasheets, pricing, and delivery schedule promptly.
