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High-Alloy Austenitic Stainless Supply
904L material for demanding chemical, marine and process environments
904L is a high-nickel, molybdenum-alloyed austenitic stainless steel identified as UNS N08904 and EN 1.4539. SAKYMETAL reviews the required product form, governing specification, dimensions, heat treatment, corrosion service, inspection and documentation before quotation.
Grade identity
UNS N08904 / EN 1.4539, a high-alloy austenitic stainless grade.
Multiple product forms
Bar, plate, sheet, tube, pipe and wire requirements are reviewed by the applicable product specification.
Corrosion-focused selection
Chemical concentration, chlorides, temperature, aeration, fabrication and cleaning practice must all be considered.
Supply Specification
The quotation and purchase order should define the fields below. Availability and acceptance criteria are confirmed against the governing product specification.
| Grade | 904L / UNS N08904 / EN 1.4539 |
|---|---|
| Product forms | Round bar, plate, sheet, coil, tube, pipe and wire by enquiry |
| Condition | Solution-annealed or other condition required by the product standard |
| Dimensions | Product-form-specific size and tolerance |
| Surface | Mill or processed finish by agreement |
| Testing | PMI, mechanical, corrosion or NDT requirements as specified |
| Traceability | Heat number and material test certificate |
| Documentation | EN 10204 3.1 or project-specific documentation when agreed |
Standards and Selection Notes
Specification follows product form
The applicable ASTM, ASME or EN specification differs for plate, bar, tube, pipe and wire. State the exact product form and governing standard rather than ordering by grade name alone.
Fabrication condition matters
Cold work, welding, heat treatment, surface condition and contamination control can change service performance. Define any welding procedure, pickling or passivation requirements.
Corrosion compatibility requires service data
904L is selected for aggressive service, but it is not universally immune. Provide medium, concentration, contaminants, temperature, pressure and cleaning cycle for material review.
Typical Applications
- Chemical processing equipment
- Acid handling and storage systems
- Marine and coastal process equipment
- Desalination and water-treatment components
- Pulp, paper and pollution-control equipment
Send a Complete RFQ
For a faster technical review, include material grade, applicable standard and revision, product form or construction, dimensions and tolerances, condition or finish, quantity, inspection and certificate requirements, delivery destination and intended service.
Related Products and Guides
Frequently Asked Questions
Is 904L the same as 316L?
No. 904L has a substantially different alloy design and is selected for more demanding corrosion conditions. A direct substitution should be based on the governing specification and service review.
Which 904L product forms can be quoted?
Bar, plate, sheet, coil, tube, pipe and wire can be reviewed. Availability, size and standard depend on the required product form and mill route.
What information is needed for a corrosion review?
Provide chemical medium, concentration, chlorides or other contaminants, temperature, pressure, flow, aeration, cleaning method, fabrication condition and expected service life.
Technical References
Reference links define general material or specification scope. The final purchase order, applicable standard revision and material test certificate govern supplied product acceptance.