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INCOLOY 825（UNSN08825） Bar/Rod
Nickel-Iron-Chromium-Molybdenum-Copper Alloy for Superior Acid and Chloride Corrosion Resistance
INCOLOY 825 bar is commonly used for machined components such as valve parts, pump shafts, fasteners, flanges and fittings where broad corrosion resistance is required. The alloy provides outstanding resistance to pitting, crevice corrosion, and chloride stress corrosion cracking, and offers excellent weldability and fabrication characteristics for critical chemical process equipment.
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 |
Diameter | 6 – 450 mm | Round bar standard; square/flat/hex available by request. |
Length | Up to 6000 mm | Cut-to-length (sawing) by agreement; define tolerance if critical. |
Shape | Round / Square / Flat / Hex | Forged / hot-rolled / cold-drawn per size requirement. |
Surface finish | Black / Peeled / Ground / Polished | Surface machining available for tight tolerance. |
End | Saw-cut / Facing / Chamfer | End prep available for machining and assembly. |
Straightness / tolerance | Per ASTM/EN or as agreed | Define straightness for long shafts and precision parts. |
Delivery condition | Solution annealed (standard) | Annealed & pickled/bright depending on size/finish. |
Dimension definition: DIA × 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 B425 / ASME SB-425 |
EN | EN 10204 |
UNS | N06022 |
DIN | 2.4858 |
JIS | NW 6022 |
Item | Range |
Diameter | 6 – 450 mm |
Length | Up to 6000 mm |
Shape | Round / Square / Flat / Hex |
Surface Finish | Black / Peeled / Ground / Polished |
End | Saw-cut / Facing / Chamfer |
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.
