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Product Overview
Stainless Steel 904L (UNS N08904) is a non-stabilized high-alloy austenitic stainless steel with low carbon content. The addition of Copper to this grade gives it greatly improved resistance to strong reducing acids, particularly sulfuric acid. It is also highly resistant to chloride attack-both pitting and crevice corrosion. Grade 904L is non-magnetic in all conditions and possesses excellent weldability and formability. Its high nickel and chromium content provide resistance to corrosion in various environments. Steel Emporium specializes in supplying 904L pipes and tubes for high-stress industrial applications.
Key Advantages & Features
Acid Resistance
Specifically designed to resist sulfuric, phosphoric, and acetic acids.
Superior Pitting Resistance
Excellent resistance to crevice corrosion in chloride-containing media.
Non-Magnetic
Retains non-magnetic properties even after severe cold working.
| Grade | C | Mn | Si | Cr | Ni | Mo | Cu | P | S |
|---|---|---|---|---|---|---|---|---|---|
| SS 904L | 0.02 max | 2.00 max | 1.00 max | 19.0 - 23.0 | 23.0 - 28.0 | 4.0 - 5.0 | 1.0 - 2.0 | 0.045 | 0.035 |
| Property | Value (Grade 904L) |
|---|---|
| Tensile Strength (MPa) min | 490 |
| Yield Strength 0.2% (MPa) min | 220 |
| Elongation (% in 50mm) min | 35% |
| Hardness (Brinell) max | 192 HBW |
| Density (kg/m³) | 8000 |
| Melting Point (°C) | 1350 |
| Grade | UNS No | Werkstoff No. | JIS | EN Standard |
|---|---|---|---|---|
| SS 904L | N08904 | 1.4539 | SUS 904L | X1NiCrMoCu25-20-5 |
Industrial Applications
Acid Processing
Sulfuric, phosphoric & acetic acid plants.
Seawater Cooling
Piping systems for heat exchangers using seawater.
Gas Scrubbers
Flue gas desulfurization (FGD) scrubbers.
Oil Refineries
Distillation columns and piping components.
Pulp & Paper
Bleaching equipment and process tanks.
Pharma Industry
High-purity chemical reactors and tubing.