Alloy 625 pipes – 2.4856 nickel alloy pipes ASTM B444
Alloy 625 is a high-temperature, extremely corrosion-resistant nickel-base alloy – for the most aggressive media, seawater and high temperatures. ROHRLINE supplies Alloy 625 pipes and tubes to ASTM B444 with EN 10204 3.1 inspection certificates – worldwide.
Application & properties
Alloy 625 is a high-temperature, extremely corrosion-resistant nickel-base alloy – for the most aggressive media, seawater and high temperatures.
- Chemical and offshore plants with the most aggressive media
- Flue-gas cleaning and seawater technology
- High-temperature components
Tell us the medium, temperature and pressure – we will check the grade with you.
Chemical composition
Typical values in wt.-% per EN standard (heat analysis).
| Element | Content (%) |
|---|---|
| Ni | ≥ 58 |
| Cr | 20.0–23.0 |
| Mo | 8.0–10.0 |
| Nb+Ta | 3.15–4.15 |
| Fe | ≤ 5.0 |
Mechanical properties
Typical values at room temperature per EN standard.
| Property | Value |
|---|---|
| Yield strength Rp0.2 | ≥ 415 MPa |
| Tensile strength Rm | ≥ 830 MPa |
| Elongation A | ≥ 30 % |
Standards, equivalents & product forms
| Topic | Detail |
|---|---|
| Standards | ASTM B444 / B446, VdTÜV |
| ASME/ASTM equivalent | ~ UNS N06625 |
| Material no. | 2.4856 |
| Short name / aka | NiCr22Mo9Nb · Inconel 625 · UNS N06625 |
We supply Alloy 625 as pipes, flanges and fittings – seamless or welded, on request with an EN 10204 3.1 / 3.2 mill certificate.
Supply programme & machining
| Item | Details |
|---|---|
| Dimensions (pipe) | Programme range: outside Ø 10.2 to 2,032 mm · DN 6 to DN 2000 · all standard wall thicknesses; available sizes depend on grade and standard |
| As flange & fitting | DN 10 to DN 1200 · PN 6 to PN 400 · Class 150 to Class 2500 to ASME B16.5 (to NPS 24), above that ASME B16.47 to Class 900 |
| Lengths & cutting | Mill lengths, sawn fixed lengths and fitting pieces from 0.1 to 12 m – sawn and bevelled |
| Minimum quantity | From a single item – from one fitting piece to the complete piping system |
| Availability | Common grades and sizes available at short notice, special sizes procured per project |
| Lead time | Standard sizes usually 3–5 working days; the binding date is confirmed with the quote |
| Machining | Sawing and bevelling, roll grooving for grooved couplings, threading to EN 10226, drilling, facing, bending with special radii |
| Surface | Blasting, coating and marking to customer specification |
| Certificates | Mill certificate 2.2, inspection certificate 3.1 to EN 10204 (standard with machining), 3.2 with notified body on request |
| Testing | Non-destructive testing by ultrasound, eddy current and X-ray, pressure test report on request |
These figures describe our supply programme. Which size is actually available in this grade is clarified with your enquiry – you usually receive the quote the same day.
We clarify availability, price and inspection certificate with your enquiry.
Frequently asked questions about Alloy 625
What is Alloy 625 used for?
For the most demanding corrosive and high-temperature applications where stainless steels fail.
What is Inconel 625?
Inconel 625 is a trade name for the nickel-base Alloy 625 (2.4856).
Which dimensions and certificates does ROHRLINE supply for Alloy 625?
ROHRLINE supplies Alloy 625 in the following range: Programme range: outside Ø 10.2 to 2,032 mm · DN 6 to DN 2000 · all standard wall thicknesses; available sizes depend on grade and standard. Documentation: Mill certificate 2.2, inspection certificate 3.1 to EN 10204 (standard with machining), 3.2 with notified body on request. Delivery worldwide; the binding date is confirmed with the quotation.
Components in Alloy 625 pipes
We supply these ready-to-install parts in this grade – to your drawing, tested and documented.
Typical industries
Request Alloy 625?
Grade, standard, size, pressure rating and quantity are enough – on request with an EN 10204 3.1 / 3.2 mill certificate. Your quote usually the same day.
All data are typical values per the relevant EN standards for first orientation – without warranty. The applicable standard and the mill certificate of the delivery are decisive.