Inconel 825 (Incoloy 825) Sheet Supplier & Exporter in IndiaASTM B424 / ASME SB424 · UNS N08825
Also sold as Incoloy 825 · Alloy 825 · UNS N08825 · W.Nr 2.4858
Inconel 825 sheet is Alloy 825 (UNS N08825) rolled below 3/16" (4.76 mm) thick for formed, pressed and lined parts under ASTM B424. It 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. Kanak Steel & Engineering Co. manufactures, trades and exports Inconel 825 sheet; depending on the product and order, material is produced or sourced and processed to the PO. EN 10204 3.1 or 3.2 certificates are available on request / as specified in the PO. Markets we have supplied to include Oman, UAE, Saudi Arabia, Brazil, Argentina, Spain and Chile (India is the home market).
- Mill & traded supply
- EN 10204 3.1 / 3.2
- PMI on request
- NACE MR0175 on request
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is Inconel 825 Sheet?
Inconel 825 sheet is a nickel–iron–chromium alloy with molybdenum, copper and titanium supplied as sheet to ASTM B424 (UNS N08825). Buyers specify it for sulphuric and phosphoric acid service, chloride stress-corrosion cracking and sour gas. It is also sold as Incoloy 825, Alloy 825, UNS N08825.
- What it is
- Nickel–iron–chromium alloy with molybdenum, copper and titanium
- Standard
- ASTM B424
- Thickness
- Below 3/16" (4.76 mm)
- Density
- 8.14 g/cm³
- Supplied as
- Annealed · cold rolled, annealed & descaled
- Best at
- Sulphuric and phosphoric acid service, chloride stress-corrosion cracking and sour gas
Inconel 825 Sheet Specification & Sizes
| Material standard | ASTM B424 · ASME SB-424 |
|---|---|
| General requirements | ASTM B906 — dimensions, tolerances and finishes |
| Grade | Inconel 825 · UNS N08825 · W.Nr 2.4858 |
| Thickness | Below 3/16" (4.76 mm) — thicker is plate |
| Width × length | 1000 / 1219 / 1250 / 1500 mm × 2000 / 2438 / 2500 / 3000 mm, or cut to size |
| Condition & finish | Annealed · cold rolled, annealed & descaled |
| Cutting | Cut to size and to width |
| Testing | PMI · UT (plate) · intergranular corrosion · hardness, on request |
| Documents | EN 10204 3.1 · 3.2 with third-party inspection · packing list · certificate of origin |
Sheet or plate?
Both are ordered under ASTM B424, so buyers often mix them up. The line is thickness: below 3/16" is sheet, 3/16" and over is plate. If your drawing calls for 3/16" (4.76 mm) or more, you need Inconel 825 plate.
Inconel 825 Sheet Finishes — Which to Order
Sheet is bought for its surface as much as its chemistry. The finish is set at the mill and cannot be fixed later without polishing cost, so name it on the order. Nickel-alloy finishes are described in words under ASTM B906 rather than by stainless finish numbers.
| Finish | How it is made | Choose it for |
|---|---|---|
| Cold rolled, annealed & descaled | Cold rolled, solution or mill annealed, then pickled | Smooth, uniform matt-to-satin surface. The standard nickel-alloy sheet finish, often called "2B equivalent" in the trade. |
| Bright annealed | Annealed in a protective atmosphere, not pickled | Brighter surface for some thin gauges; confirm availability with the mill. |
| Hot rolled, annealed & descaled | Hot rolled, annealed, then pickled or blasted | Rougher finish on heavier sheet close to the plate boundary. |
Inconel 825 Sheet 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 Sheet 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 Sheet Weight Chart & Calculator
Use this to budget freight and price per piece. Weight (kg) = length (m) × width (m) × thickness (mm) × 8.14.
Example: 2500 × 1250 × 2 mm
2.5 × 1.25 × 2 × 8.14 = 50.9 kg
Total weight —
| Thickness | 2500 × 1250 sheet | Per m² |
|---|---|---|
| 0.5 mm | 12.7 kg | 4.1 kg |
| 0.8 mm | 20.4 kg | 6.5 kg |
| 1 mm | 25.4 kg | 8.1 kg |
| 1.2 mm | 30.5 kg | 9.8 kg |
| 1.5 mm | 38.2 kg | 12.2 kg |
| 2 mm | 50.9 kg | 16.3 kg |
| 3 mm | 76.3 kg | 24.4 kg |
| 4 mm | 101.8 kg | 32.6 kg |
Inconel 825 sheet gauge to mm
Gauge numbers are still common on drawings. Weights below use the density of Inconel 825, 8.14 g/cm³.
Full chart: SWG sheet gauge chart.
| SWG | mm | inch | kg/m² (ρ 8.14) |
|---|---|---|---|
| 10 | 3.251 | 0.1280 | 26.46 |
| 11 | 2.946 | 0.1160 | 23.98 |
| 12 | 2.642 | 0.1040 | 21.51 |
| 14 | 2.032 | 0.0800 | 16.54 |
| 16 | 1.626 | 0.0640 | 13.24 |
| 18 | 1.219 | 0.0480 | 9.92 |
| 20 | 0.914 | 0.0360 | 7.44 |
| 22 | 0.711 | 0.0280 | 5.79 |
| 24 | 0.559 | 0.0220 | 4.55 |
Six-digit Harmonized System heading (nickel alloy, chapter 75). Your country adds its own digits — confirm with your customs broker. All HS codes.
How to Verify Inconel 825 Sheet with PMI
Positive material identification with a handheld XRF gun confirms the alloy on the piece itself, in seconds, before it is cut or welded. Inconel 825 is most often mixed up with SS 904L — the table shows which elements tell them apart.
Handheld XRF does not measure carbon or nitrogen; those come from the mill certificate or optical emission (OES) testing. PMI can be arranged on request — state it on your enquiry.
Under technical review for TDS.
| Element | Inconel 825 | SS 904L |
|---|---|---|
| Nickel | As specified | As specified |
| Chromium | As specified | As specified |
| Molybdenum | As specified | As specified |
| Copper | As specified | As specified |
| Titanium | As specified | — |
| Iron | As specified | As specified |
| Manganese | As specified | As specified |
Inconel 825 Sheet Price — What Decides It
Two quotes for "825 sheet" can differ by 20% and both be fair. We quote 825 sheet per kg for full sizes and per piece for cut sizes. These six things move the price per kg, so you can compare offers like for like.
Inconel 825 Sheet Tolerances, Edge & Flatness
Thickness, width, length and flatness tolerances for 825 sheet come from ASTM B906, the general-requirements standard called up by the product specification. Most quality problems with sheet are about these four, not the chemistry.
| Thickness tolerance | Per ASTM B906 tables, by thickness and width; ask for a tighter range on the PO if your press tooling needs it |
|---|---|
| Edge | Mill edge, or slit / cut edge for an exact width |
| Flatness | Standard flatness per ASTM B906; specify levelled or tension-levelled sheet where flatness is critical |
| Surface protection | PVC / PE film on bright and polished finishes; use laser-grade film if the sheet will be laser cut |
| Marking | Grade, heat number and standard marked as specified in the PO (piece or bundle) |
Sheet, Strip, Plate or Coil?
Under ASTM B906, flat material below 3/16" (4.76 mm) and 24" or wider is sheet; cold-rolled material narrower than 24" is strip; 3/16" (4.76 mm) and over it is plate (the metric edition, B906M, rounds these to 5 mm and 600 mm). Coil is the same product wound up for continuous processing — order coil if you will slit, blank or roll-form it yourself.
Inconel 825 Sheet Applications
Sheet goes where 825 has to be formed, pressed or used as a thin lining. For heavy shells, tube sheets and machined parts, see Inconel 825 plate.
How your 825 sheet order runs
- 01Enquiry review — we confirm size, standard edition and documents against your MR or drawing.
- 02Heat selection & PMI — the mill certificate is checked against your order; PMI can be arranged depending on product and requirements, as specified in the PO.
- 03Processing — cutting to your sizes, with heat numbers transferred where the PO requires it.
- 04Inspection — your third-party inspector witnesses, or we share photos and test reports.
- 05Packing & dispatch — seaworthy packing from Nhava Sheva (JNPT), Mumbai, FOB or CIF, documents sent before the vessel sails.
Standards on this page
Forming & Welding Inconel 825 Sheet
Thin sheet is formed, folded and welded with little margin for heat. These are the points fabricators ask us about — matching filler for 825 is ERNiFeCr-1 (AWS A5.14).
General guidance only; follow your approved WPS and forming procedure.
| Bending | Annealed nickel-alloy sheet forms well but work-hardens fast; use generous radii and anneal between severe operations if needed. |
|---|---|
| Cleanliness first | Remove oil, marking ink, sulphur and lead before welding or heat treatment; they embrittle nickel alloys. |
| Thin-gauge welding | TIG (GTAW) with low heat input and argon back-purge; nickel weld pools are sluggish, so do not over-heat to make them flow. |
| Distortion | Copper backing bars and close tacking keep thin sheet flat. |
How to Order Inconel 825 Sheet: RFQ Checklist
Get an accurate quote the first time. Copy this list into your enquiry:
- Standard and edition — e.g. ASTM B424-latest
- Thickness × width × length, and number of pieces
- Finish (2B, BA, No.4…) and protective film if needed
- Certificate type — 3.1 or 3.2, and the inspection agency
- Extra tests — NACE, UT, intergranular corrosion
- Delivery port, Incoterm and required date
Inconel 825 sheet — questions buyers ask
Is Inconel 825 the same as Incoloy 825?
Incoloy 825, Alloy 825, UNS N08825 are names used for Inconel 825, and sheet is ordered to ASTM B424 whichever name is on the enquiry.
What is the price of Inconel 825 sheet per kg?
It moves with nickel on the LME, so a fixed list price is out of date within days. Thickness, cut size, quantity and documents also change it. Send your size and quantity and we quote the same working day.
What documents come with an export shipment?
An EN 10204 3.1 mill certificate (or 3.2 with a third-party inspector), commercial invoice, packing list with heat numbers, and certificate of origin. Test reports are added for any extra tests ordered.
Which finish should I order for Inconel 825 sheet?
The standard is cold rolled, annealed and descaled, which most buyers call "2B equivalent". Ask for bright annealed only if you need a brighter surface and the mill can supply it in your thickness.
Is Inconel 825 sheet ordered by gauge or by millimetre?
ASTM B424 uses millimetres or inches. Gauge numbers still appear on older drawings; the gauge-to-mm table on this page converts them, with 8.14 g/cm³ weights for 825.
Can I order Inconel 825 sheet cut to size?
Yes. Send finished sizes and quantities, or a drawing; we quote cut pieces as well as full sheets. Tell us if edges must be deburred or protected.
Sheet, strip or coil — which should I order?
Sheet if you need flat pieces below 3/16" (4.76 mm) and at least 24" wide; strip if narrower; coil if you will slit, blank or roll-form the material on your own line.
What is the minimum order for sheet?
There is no fixed minimum for stock sizes — single sheets and cut pieces are quoted. Mill orders for a non-stock thickness or finish carry the mill minimum.
Can Inconel 825 sheet be supplied to NACE MR0175?
Inconel 825 (UNS N08825) can be supplied for sour service when the PO specifies NACE MR0175 / ISO 15156; acceptability depends on the material condition, hardness and the environmental limits in that standard, which the purchaser must confirm for the application.
Inconel 825 or Inconel 625 — which should I choose?
Inconel 825 is chosen for sulphuric and phosphoric acid service, chloride stress-corrosion cracking and sour gas. Inconel 625 is the step up when you need more pitting resistance or strength. See the comparison table on this page, or ask us with your process conditions.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026