Inconel 625 — Sheet, Plate, Coil, Pipe & Tube & Fittings
Also sold as Alloy 625 · UNS N06625 · W.Nr 2.4856 · Nicrofer 6020
Inconel 625 is a nickel–chromium–molybdenum alloy with niobium, chosen for seawater, high strength and high temperature in one alloy. 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 N06625
- W.Nr 2.4856
- PREN ≈ 51
- ρ 8.44 g/cm³
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
Inconel 625 Products
Inconel 625 Names, Designations & Composition
Inconel 625 is one alloy sold under several names. Its UNS number is N06625, the European material number is W.Nr 2.4856 and the EN name is NiCr22Mo9Nb. The chart on the right shows the specified range of each main alloying element; the balance is the base metal.
Inconel 625 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 625 sheet | ASTM B443 | ASTM A480 / B906 |
| Inconel 625 plate | ASTM B443 | ASTM A480 / B906 / A20 |
| Inconel 625 coil | ASTM B443 | ASTM A480 |
| Inconel 625 pipe & tube | ASTM B444 · ASTM B705 | ASME B36.19 / B36.10 |
| Inconel 625 fittings | ASTM B366 WPNCMC · ASTM B564 | ASME B16.9 · B16.11 |
| Inconel 625 flanges | ASTM B564 | ASME B16.5 · B16.47 |
| Inconel 625 fasteners | ASTM F468 (N06625) where specified for applicable bolts, hex cap screws, socket-head cap screws and studs (0.250–1.500 in.), and ASTM F467 for applicable nuts (0.250–1.500 in.); for other types, material may be supplied to ASTM B446 bar where applicable, subject to the purchase specification | ASME B18.2.1 · B18.2.2 |
Inconel 625 Chemical Composition
Under technical review for TDS.
| Element | Current requirement |
|---|---|
| Nickel | As specified |
| Chromium | As specified |
| Molybdenum | As specified |
| Niobium + Tantalum | As specified |
| Iron | As specified |
| Carbon | As specified |
| Manganese | As specified |
| Silicon | As specified |
| Titanium | As specified |
| Aluminium | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification to be verified: ASTM B443 for UNS N06625.
Inconel 625 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 B443 for UNS N06625 — Grade 1 annealed plate.
Density & Physical Properties
| Property | Value |
|---|---|
| Density | 8.44 g/cm³ |
| Melting range | 1290 – 1350 °C |
| Magnetic | Non-magnetic |
| PREN (approx.) | ≈ 51 |
Inconel 625 Equivalent Grades
Inconel 625 Corrosion Resistance — What Each Element Does
About 9% molybdenum gives PREN above 50 — seawater pitting is rarely a concern.
Niobium strengthens the matrix without heat treatment.
High nickel makes it virtually immune to chloride stress-corrosion cracking.
Keeps useful strength and oxidation resistance at high temperature.
Inconel 625 vs 825, 2507 and C276
| Grade | PREN (approx.) | Pick it for |
|---|---|---|
| Inconel 825 | ≈ 31 | Sulphuric and phosphoric acid service, chloride stress-corrosion cracking and sour gas |
| Super Duplex 2507 | ≈ 42 | Seawater and high-chloride service where strength also matters |
| Inconel 625 | ≈ 51 | Seawater, high strength and high temperature in one alloy |
| Hastelloy C276 | ≈ 68 | The most aggressive mixed acids, wet chlorine and hypochlorite |
Welding Inconel 625
| Matching filler | ERNiCrMo-3 (AWS A5.14) |
|---|---|
| Also used | ENiCrMo-3 electrode |
Inconel 625 for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiInconel 625 — questions buyers ask
What is Inconel 625?
Inconel 625 is a nickel–chromium–molybdenum alloy with niobium. It is chosen for seawater, high strength and high temperature in one alloy.
Which standards cover Inconel 625 products?
Sheet: ASTM B443; Plate: ASTM B443; Coil: ASTM B443; Pipe & Tube: ASTM B444 · ASTM B705; Fittings: ASTM B366 WPNCMC · ASTM B564; Flanges: ASTM B564; Fasteners: ASTM F468 (N06625) where specified for applicable bolts, hex cap screws, socket-head cap screws and studs (0.250–1.500 in.), and ASTM F467 for applicable nuts (0.250–1.500 in.); for other types, material may be supplied to ASTM B446 bar where applicable, subject to the purchase specification. Always name the standard and edition on your order.
What is the UNS number of Inconel 625?
UNS N06625, with the European material number W.Nr 2.4856.
What is the density of Inconel 625?
8.44 g/cm³ — use it to calculate weights: plate kg = L(m) × W(m) × t(mm) × 8.44.
Inconel 625 or Hastelloy C276?
Inconel 625 suits seawater, high strength and high temperature in one alloy; Hastelloy C276 is the step up for the most aggressive mixed acids, wet chlorine and hypochlorite.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026