Inconel 825 / Incoloy 825 — Sheet, Plate, Coil, Pipe & Tube & Fittings
Also sold as Incoloy 825 · Alloy 825 · UNS N08825 · W.Nr 2.4858
Inconel 825 is a nickel–iron–chromium alloy with molybdenum, copper and titanium, chosen for sulphuric and phosphoric acid service, chloride stress-corrosion cracking and sour gas. We supply it as sheet, plate, coil, pipe & tube, fittings, flanges, fasteners, with EN 10204 3.1 certificates, from Mumbai to India, the Gulf, South-East Asia, South America, Europe, the UK and the USA.
- UNS N08825
- W.Nr 2.4858
- PREN ≈ 31
- ρ 8.14 g/cm³
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
Inconel 825 Products
Inconel 825 Names, Designations & Composition
Inconel 825 is one alloy sold under several names. Its UNS number is N08825, the European material number is W.Nr 2.4858 and the EN name is NiCr21Mo. The chart on the right shows the specified range of each main alloying element; the balance is the base metal.
Inconel 825 Specifications by Product — Which Standard Applies?
The material standard changes with the product form. This is the table buyers ask for most.
| Product | Material standard | Dimensions |
|---|---|---|
| Inconel 825 sheet | ASTM B424 | ASTM A480 / B906 |
| Inconel 825 plate | ASTM B424 | ASTM A480 / B906 / A20 |
| Inconel 825 coil | ASTM B424 | ASTM A480 |
| Inconel 825 pipe & tube | ASTM B423 · ASTM B705 | ASME B36.19 / B36.10 |
| Inconel 825 fittings | ASTM B366 WPNICMC · ASTM B564 | ASME B16.9 · B16.11 |
| Inconel 825 flanges | ASTM B564 | ASME B16.5 · B16.47 |
| Inconel 825 fasteners | May be machined from ASTM B425 bar (UNS N08825), where applicable; finished fastener requirements are to the purchase specification or project drawing | ASME B18.2.1 · B18.2.2 |
Inconel 825 Chemical Composition
Under technical review for TDS.
| Element | Current requirement |
|---|---|
| Nickel | As specified |
| Iron | As specified |
| Chromium | As specified |
| Molybdenum | As specified |
| Copper | As specified |
| Titanium | As specified |
| Carbon | As specified |
| Manganese | As specified |
| Silicon | As specified |
| Aluminium | As specified |
| Sulphur | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification to be verified: ASTM B424 / B423 / B564 for UNS N08825.
Inconel 825 Mechanical Properties
Under technical review for TDS.
| Property | Current requirement |
|---|---|
| Tensile strength | As specified |
| Yield strength 0.2% | As specified |
| Elongation | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification and condition to be verified: ASTM B424 / B423 / B564 for UNS N08825 — Annealed.
Density & Physical Properties
| Property | Value |
|---|---|
| Density | 8.14 g/cm³ |
| Melting range | 1370 – 1400 °C |
| Magnetic | Non-magnetic (annealed) |
| PREN (approx.) | ≈ 31 |
Inconel 825 Equivalent Grades
Inconel 825 Corrosion Resistance — What Each Element Does
High nickel content takes the alloy well clear of the range where austenitic stainless steels crack in hot chlorides.
Molybdenum and copper give 825 its standing in sulphuric and phosphoric acid service, and help against pitting.
Chromium handles nitric acid, nitrates and oxidising salts.
Titanium stabilises the alloy, so welded parts resist sensitisation in the heat-affected zone.
Where Is Inconel 825 Used? Applications
Inconel 825 vs 316L, 904L and 625
| Grade | PREN (approx.) | Pick it for |
|---|---|---|
| SS 316 / 316L | ≈ 24 | Chloride-bearing process fluids, marine air and pharmaceutical service |
| Inconel 825 | ≈ 31 | Sulphuric and phosphoric acid service, chloride stress-corrosion cracking and sour gas |
| SS 904L | ≈ 35 | Dilute sulphuric acid, phosphoric acid and chloride-bearing cooling water |
| Inconel 625 | ≈ 51 | Seawater, high strength and high temperature in one alloy |
Welding Inconel 825
| Matching filler | ERNiFeCr-1 (AWS A5.14) |
|---|---|
| Also used | ERNiCrMo-3 wire · ENiCrMo-3 electrode |
Guides
Inconel 825 for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiTechnical documentation
A Kanak Steel technical data sheet for this product is being prepared. It is released as a PDF only after the current standard text, each value and its evidence, and a named technical reviewer have been confirmed — so no draft or placeholder sheet is offered for download.
Need technical data now? Send your enquiry with the standard and edition you are ordering to.
| Document | Inconel 825 — Master grade technical data sheet |
|---|---|
| Document ID | KS-TDS-N08825-M |
| Grade | Inconel 825 |
| UNS | N08825 |
| Product form | All product forms (master) |
| Standard | ASTM B424 (current edition B424-22) ASTM B423 (current edition B423-22) ASTM B366 (current edition B366/B366M-25) ASTM B564 (current edition B564-25) By product form — flat-rolled, pipe and tube, fittings, forgings |
| Status | Under technical review for TDS |
- Technical Data Sheet — Under technical review
Inconel 825 — questions buyers ask
What is Inconel 825?
Inconel 825 is a nickel–iron–chromium alloy with molybdenum, copper and titanium. It is chosen for sulphuric and phosphoric acid service, chloride stress-corrosion cracking and sour gas.
Which standards cover Inconel 825 products?
Sheet: ASTM B424; Plate: ASTM B424; Coil: ASTM B424; Pipe & Tube: ASTM B423 · ASTM B705; Fittings: ASTM B366 WPNICMC · ASTM B564; Flanges: ASTM B564; Fasteners: May be machined from ASTM B425 bar (UNS N08825), where applicable; finished fastener requirements are to the purchase specification or project drawing. Always name the standard and edition on your order.
What is the UNS number of Inconel 825?
UNS N08825, with the European material number W.Nr 2.4858.
What is the density of Inconel 825?
8.14 g/cm³ — use it to calculate weights: plate kg = L(m) × W(m) × t(mm) × 8.14.
Inconel 825 or Inconel 625?
Inconel 825 suits sulphuric and phosphoric acid service, chloride stress-corrosion cracking and sour gas; Inconel 625 is the step up for seawater, high strength and high temperature in one alloy.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026