Nickel Alloy 825
UNS N08825
Corrosion-Resistant Performance for Aggressive Environments
Nickel Alloy 825 is a non-magnetic, nickel-based alloy containing chromium, molybdenum and copper. It is designed for use in highly corrosive environments where resistance to acids and stress corrosion cracking is critical.
The alloy performs reliably under severe operating conditions, offering good mechanical properties from cryogenic temperatures up to approximately 540 °C (1000 °F). It is particularly suitable for applications exposed to reducing and oxidising acids, as well as aggressive process media.
Key Characteristics
- High resistance to reducing and oxidising acids
- Resistant to sulphuric and phosphoric acids
- Excellent resistance to stress corrosion cracking
- Resistant to localised corrosion (Pitting, Crevice corrosion, Intergranular corrosion)
- Good mechanical properties from cryogenic temperatures up to approx. 540 °C (1000 °F)
- Non-magnetic alloy
Fast, Flexible, Global Delivery
Whether you need immediate delivery from stock or scheduled shipments for long-term projects, we deliver where and when you need it.
From urgent single shipments to complete packages, we tailor our delivery to your planning.
Prefer to handle logistics yourself? No problem. We offer flexible delivery terms, including Ex Works. Want us to take care of everything? We’ll arrange full-service transport, tracking, and documentation.
Get in touch to discuss the best delivery setup for your project.
Product Details
Applications – by Service and Function
Nickel Alloy 825 is commonly used in services where corrosion resistance and mechanical reliability are essential:
Handling of upstream oil & gas fluids
Chemical processing environments
Pressure vessels (within approved temperature limits)
Acid production systems
Pollution control equipment
Pickling equipment components, including: Heating coils, Tanks, Baskets, Chains
Applications – by Industry
Upstream oil & gas
Chemical processing
Nuclear industry
Pollution control
Acid production facilities
Standards and Specifications
| Standard | Description |
|---|---|
| UNS | N08825 |
| ASTM B423 | Seamless pipes and tubes |
| ASTM B366 | Wrought fittings |
| ASTM B564 | Forgings and flanges |
| ASME BPVC | Approved for pressure vessels up to 538 °C (1000 °F), Section VIII Division 1 |
Stainalloy Capabilities
Stainalloy supplies Nickel Alloy 825 for both large project packages and short-lead-time stock deliveries, supporting customers throughout all project phases.
Key capabilities:
- Global supply of large Alloy 825 piping packages for greenfield projects
- Medium to small Alloy 825 piping packages supplied from stock during advanced construction phases
- Stock availability of seamless pipe from ½” through 8”
- Pipes supplied in cold worked, annealed condition
- Materials sourced exclusively from reputable, tier-one mills
- Pipes manufactured in accordance with ASTM B423
- Seamless and welded fittings in accordance with ASTM B366 UNS N08825
- Flanges and forgings supplied in accordance with ASTM B564 UNS N08825
- Additional testing exceeding industry and customer-specific requirements, including Shell, ADNOC and PDO standards
- Dedicated stock programmes for upstream oil & gas construction projects
- Optimised for short lead times
- Designed to meet stringent quality and documentation requirements
This approach ensures material availability, full compliance and operational reliability in demanding service conditions.
Rowan de Visser
Senior Sales Engineer
Germán Gómez
Head of Stock Sales
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