Description
Incoloy 825 / Alloy 825 Flanges – ASTM B564 UNS N08825
Forged Alloy 825 flange solutions for selected acid, pollution-control, oil-and-gas and chemical-process systems requiring UNS N08825.
Quick engineering answer
Incoloy 825 and Alloy 825 are established names for UNS N08825, a nickel-iron-chromium alloy containing molybdenum and copper. For forged flanges, the procurement identity is ASTM B564 UNS N08825. “Inconel 825” appears in searches, but it is not the preferred grade name.
Product specification
| Material | ASTM B564 UNS N08825 nickel-iron-chromium alloy |
|---|---|
| Available forms | Weld neck, blind, slip-on, socket weld, threaded, lap joint, orifice and drawing-specific flanges where permitted |
| Dimensional standards | ASME B16.5; ASME B16.47 for applicable large diameters; EN 1092-1 or approved drawings on request |
| Pressure classes | Class 150, 300, 400, 600, 900, 1500 and 2500 within the selected standard, material group and size limits |
| Facing | Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF) where permitted, or drawing-specific facing |
| Documentation | EN 10204 3.1 MTC, heat-number traceability, dimensional report and ordered inspection records |
Pressure-temperature ratings depend on the governing code, flange standard edition, material group, size and class. Confirm the complete project specification before ordering.
Grade and terminology check
| Preferred page name | Incoloy 825 / Alloy 825 Flanges | Supports both recognized purchasing terms |
|---|---|---|
| Formal material identity | ASTM B564 UNS N08825 | EN 2.4858 is a commonly cross-referenced designation |
| Common search variant | Inconel 825 flanges | Clarify the terminology instead of using it as the primary product name |
Material selection
Alloy 825 is selected for useful resistance in several reducing and oxidizing acid environments, but service suitability is conditional. Media chemistry, acid concentration, chlorides, impurities, aeration, temperature, crevices and welding history require review.
Matching-material note: Match the exact UNS N08825 product-form specification for pipe, fittings and other adjoining components. A common alloy family name does not replace the standard required for each product form.
Quality controls available
- PMI with heat-number traceability
- EN 10204 3.1 material certificate
- Intergranular, corrosion or NDE testing when specified
- Dimensions, facing finish and visual inspection
Typical applications
Applications are selection cues, not blanket approvals. Process media, pressure, temperature, corrosion data, fatigue, fabrication and code requirements govern final suitability.
Standards hierarchy
Information required for quotation
Provide the material grade, flange type, standard and edition, NPS or DN, pressure class or PN rating, pipe schedule or exact bore, facing and finish, quantity, delivery destination, heat treatment, NDE, testing, certification and third-party inspection requirements.
Frequently asked questions
Should buyers specify Inconel 825 or Incoloy 825?
Use Incoloy 825 or the generic name Alloy 825, and place ASTM B564 UNS N08825 on the purchase order. This avoids ambiguity regardless of the commercial trade name used in a search.
Which flange styles are available?
Depending on size, class and standard, supply can include weld neck, blind, slip-on, socket-weld, threaded, lap-joint, orifice and drawing-specific flanges.
What documentation can be supplied?
Typical documentation includes an EN 10204 3.1 MTC, heat traceability and dimensional report. PMI, NDE, corrosion testing and third-party inspection can be added when specified before manufacture.
Request a specification review and quotation
Send the complete RFQ or piping material specification. SASA FLANGE will review grade identity, dimensions, facing, inspection and documentation before production.
Related products and engineering resources
Nickel Alloy Material Center ASTM B366 Incoloy 825 Stub End All Flanges
