1.4539 pipes – 904L stainless steel pipes EN 10216-5
1.4539 (904L) is a high-alloy, copper-bearing super-austenite with high resistance to sulphuric acid and aggressive media. ROHRLINE supplies 1.4539 pipes and tubes to EN 10216-5 and EN 10217-7 with EN 10204 3.1 inspection certificates – worldwide.
Application & properties
1.4539 (904L) is a high-alloy, copper-bearing super-austenite with high resistance to sulphuric acid and aggressive media.
- Sulphuric-acid and pickling plants
- Chemical and process plants with aggressive media
- Flue-gas desulphurisation
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 (%) |
|---|---|
| C | ≤ 0.020 |
| Cr | 19.0–21.0 |
| Ni | 24.0–26.0 |
| Mo | 4.0–5.0 |
| Cu | 1.2–2.0 |
| N | ≤ 0.15 |
Mechanical properties
Typical values at room temperature per EN standard.
| Property | Value |
|---|---|
| Yield strength Rp0.2 | ≥ 230 MPa |
| Tensile strength Rm | 520–720 MPa |
| Elongation A | ≥ 35 % |
Standards, equivalents & product forms
| Topic | Detail |
|---|---|
| Standards | EN 10216-5 (seamless), EN 10217-7 (welded), EN 10088 |
| ASME/ASTM equivalent | ~ UNS N08904 |
| Material no. | 1.4539 |
| Short name / aka | X1NiCrMoCu25-20-5 · 904L |
We supply 1.4539 (904L) 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 1.4539 (904L)
What is 904L used for?
Above all in sulphuric-acid and pickling technology and with aggressive chemicals where 316L is no longer sufficient.
Why is 904L so resistant?
Its high nickel, molybdenum and copper content makes it particularly acid-resistant.
Which dimensions and certificates does ROHRLINE supply for 1.4539?
ROHRLINE supplies 1.4539 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.
Request 1.4539 (904L)?
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.