904L Stainless Steel Plate Manufacturer & Supplier
904L is a high-alloy austenitic with 4-5% molybdenum and 1-2% copper, giving resistance to sulphuric, phosphoric and acetic acids that ordinary 316L cannot survive, plus strong resistance to chloride stress corrosion cracking. Specified when 316L pits and duplex is ruled out by stress corrosion risk.
UNS: N08904 | Category: Super Austenitic & High Alloy Stainless
Size Range
Outer Diameter: Thickness 3 - 60 mm · Width 1000-3000 mm · Length 2000-12000 mm
Wall Thickness: 3 - 60 mm
Chemical Composition (%)
| C | Si | Mn | P | S | Cr | Ni | Mo | Cu |
|---|---|---|---|---|---|---|---|---|
| 0.020 max | 1.00 max | 2.00 max | 0.045 max | 0.035 max | 19.00-23.00 | 23.00-28.00 | 4.00-5.00 | 1.00-2.00 |
Mechanical Properties
- Yield Strength Rp0.2
- 220 MPa min
- Tensile Strength Rm
- 490-710 MPa
- Elongation A5
- 35% min
- Hardness
- 90 HRB max
Applicable Standards
- ASTM A240 / ASME SA240 (plate, sheet, strip)
- ASTM A480 (general requirements)
- EN 10088-2 (corrosion resisting sheet & plate)
- EN 10028-7 (pressure purposes)
- JIS G4304 / G4305
- EN 10204 3.1 certification
Applications
- Sulphuric acid plant equipment
- Phosphoric acid process vessels
- Flue gas scrubbers
- Pickling line tanks
- Seawater heat exchangers
Industries Served
- Chemical & Petrochemical
- Fertilizer
- Power & Energy
- Water & Desalination
- Pulp & Paper
Equivalent Grades
- EN
- 1.4539 / X1NiCrMoCu25-20-5
- JIS
- SUS 890L
- UNS
- N08904