High-Nickel Austenitic Structure
Nickel at 23–28% supports the high-alloy austenitic structure and material performance under specified service conditions.
Global Steel Supply & Processing
ASTM A240/A240M · UNS N08904 · EN 1.4539
Match the alloy designation, surface, dimensions and inspection documents to your order.
| Grade | 904L Stainless Steel / UNS N08904 |
|---|---|
| EN reference | 1.4539 / X1NiCrMoCu25-20-5 (confirm EN product requirements separately) |
| Material family | High-alloy, low-carbon austenitic stainless steel |
| Product standard | ASTM A240/A240M; edition specified in the purchase order |
| General delivery requirements | ASTM A480/A480M where applicable |
| Delivery condition | Solution-annealed / mill-annealed as specified |
| Product form | Flat plate, sheet and cut blanks by quotation |
| Surface finish | No. 1 / 1D; 2B and other finishes subject to gauge and production route |
| Order dimensions | Thickness × width × length; required flatness and edge condition |
| Inspection | MTC, PMI and agreed dimensional or surface inspection |
Send the details needed for a grade-specific material quotation.
904L is selected for specific acid and chloride-bearing service conditions. Share your operating medium and temperature with the material enquiry.
Nickel at 23–28% supports the high-alloy austenitic structure and material performance under specified service conditions.
4–5% molybdenum contributes to resistance to pitting and crevice corrosion in selected chloride-containing environments.
1–2% copper supports corrosion resistance in certain sulfuric- and phosphoric-acid duties.
Include medium, concentration, service temperature and inspection requirements with your 904L enquiry.
The chemical limits below correspond to a published ASTM 904L / UNS N08904 plate reference.
| Element | Content by mass | Element | Content by mass |
|---|---|---|---|
| Chromium (Cr) | 19.0–23.0% | Nickel (Ni) | 23.0–28.0% |
| Molybdenum (Mo) | 4.0–5.0% | Copper (Cu) | 1.0–2.0% |
| Carbon (C) | ≤0.020% | Manganese (Mn) | ≤2.00% |
| Silicon (Si) | ≤1.00% | Nitrogen (N) | ≤0.10% |
| Phosphorus (P) | ≤0.045% | Sulfur (S) | ≤0.035% |
| Iron (Fe) | Balance | Grade designation | UNS N08904 |
Purchase acceptance follows the selected ASTM standard edition and heat analysis. EN 1.4539 has its own composition and delivery requirements.
Reference minimum requirements for ASTM A240/UNS N08904 plate in the annealed condition.
| Mechanical property | Published plate reference |
|---|---|
| 0.2% Offset Yield Strength | ≥220 MPa (31 ksi) |
| Tensile Strength | ≥490 MPa (71 ksi) |
| Elongation | ≥35% |
| Hardness | ≤90 HRB |
| Nominal Density | 7.95 g/cm³ (7,950 kg/m³) |
Connect the material certificate and test conditions to your actual plate thickness and purchased standard.
Figures are based on published 904L/UNS N08904 plate data; final testing follows the agreed purchase specification.
Confirm the specified mill finish, flatness, thickness and protective handling for your purchased plates.
Hot-rolled, annealed and descaled flat plate surface.
Cold-rolled finishes confirmed by product thickness and supply form.
Thickness, edge quality and surface protection specified with the order.
Your application determines the chemical exposure, operating temperature, material testing and fabrication details.
Acid-service tanks, vessel shells and process containment equipment.
Grade-selected process equipment for specified acid concentrations and temperatures.
Plate and component applications within corrosion-focused process designs.
Scrubber and gas-treatment components exposed to acidic condensates.
Bleaching and chemical-processing equipment under specified conditions.
Process components chosen for appropriate saline or chloride-bearing duties.
Compare the alloy family and your operating environment before confirming the product grade.
| Grade | Structure / characteristic | Typical purchasing consideration | Page |
|---|---|---|---|
| 316L / S31603 | Low-carbon Cr–Ni–Mo austenitic | General welded process equipment; service selection by medium | 316L Plate → |
| 904L / N08904 | High-Ni, high-Mo, Cu-alloyed austenitic | Selected acid-service equipment and higher-alloy corrosion duties | Current product |
| 2205 / S32205 | Duplex austenitic–ferritic | Strength and corrosion-performance combination in designated duties | 2205 Plate → |
| 2507 / S32750 | Super duplex austenitic–ferritic | High-strength components under demanding chloride conditions | 2507 Plate → |
Material selection relies on the applicable design code, exposure conditions, temperature and fabrication requirements.
Your material schedule is supported by our company-wide steel production, inventory system, inspection coordination and export supply.
Company-wide annual steel production supports long-term purchasing programmes.
Our overall steel inventory supports planned supply; confirm 904L grade and dimension availability.
Specify UNS N08904, chemistry, heat traceability, MTC and additional inspection with your purchase.
Arrange the requested plate sizes, shipment batches, packing and destination within one RFQ.
Send your 904L purchase list with dimensions, quantity and delivery requirements. We will confirm the grade-specific production or inventory arrangement and quotation terms.
Specify alloy identification, chemical composition, mechanical properties, thickness, surface condition and heat traceability in your material acceptance plan.
Estimate your order weight from plate sizes and quantity using 7,950 kg/m³ nominal density.
Theoretical mass; final shipment weight follows the agreed dimensions and weighing basis.
Include your quantity, surface finish and destination to receive the material offer for your purchasing schedule.
Include cut profiles and tolerances alongside your 904L material purchase requirements.
Drawing-based laser profiles subject to plate thickness and processing suitability.
Profile-cut plate blanks as agreed in the processing quotation.
Flat blanks and specified holes matched to approved drawings.
Attach your drawing to request material and cut-piece pricing.
Specify protective wrapping, bundle identification, handling conditions and destination when requesting your 904L quotation.
Find related stainless alloys and connect your full purchase list to one enquiry.
Send UNS N08904, required standard edition, dimensions, finish, quantity, required inspection and destination. Include service conditions when material suitability forms part of your specification.
904L has higher nickel and molybdenum with copper added for selected corrosive environments. Compare material properties with your actual service medium and governing design standard.
List PMI, MTC, heat identification and other inspection requirements in your RFQ. Our team will confirm the inspection scope with the quotation.
Attach your cut-piece schedule, finished dimensions and required tolerances to request a combined plate and processing quotation.
Send the grade, plate sizes, quantity, inspection requirements and delivery destination to BAOSTEEL
Send your required grade, dimensions, quantity and destination. Our team will review the inquiry.