X1NiCrMoCu25-20-5 / 1.4539 Flange Manufacturer – Alloy 904L Flanges Supplier
We are a trusted manufacturer and global exporter of X1NiCrMoCu25-20-5 / 1.4539 flanges, also known as 904L stainless steel flanges. Engineered for excellent corrosion resistance in aggressive environments, these flanges are ideal for chemical, marine, and offshore applications.
EN 1092-1 is the European standard for circular flanges made of steel. Within this standard, Type 11 designates a weld neck flange (WN flange), which is butt-welded to the pipe and ideal for high-pressure, high-temperature applications.
1.4539 / X1NiCrMoCu25-20-5 / 904L Stainless Steel Material specification
- EN Designation: 1.4539
- UNS Number: N08904
- Trade Name: Alloy 904L
- Standard: EN 10222-5, ASTM A182 F904L
This austenitic stainless steel contains high levels of nickel (25%) and molybdenum (4.5%), offering exceptional resistance to sulfuric acid, chloride pitting, and stress corrosion cracking.
1.4539 / X1NiCrMoCu25-20-5 Available Flange Types
We manufacture 1.4539 flanges in following flange styles:
- 1.4539 / X1NiCrMoCu25-20-5 Weld Neck Flanges (WNRF)
- 1.4539 / X1NiCrMoCu25-20-5 Slip On Flanges (SORF)
- 1.4539 / X1NiCrMoCu25-20-5 Blind Flanges (BLRF)
- Socket Weld Flanges (SWRF)
- Lap Joint Flanges (LJ)
- Threaded Flanges
- Spectacle Blinds & Spacer Rings
1.4539 / X1NiCrMoCu25-20-5 Flange Dimensions and Standards
- Size Range: ½” to 48” (DN15–DN1200)
- Pressure Ratings: Class 150 to 2500 / PN6 to PN100
- Dimensions as per: ASME B16.5, B16.47, EN 1092-1, DIN, BS, GOST
- Face Types: RF, RTJ, FF
1.4539 / X1NiCrMoCu25-20-5 Chemical Composition (%): EN 10088-1
| Element | Content (%) |
|---|---|
| C | ≤ 0.02 |
| Cr | 19.0 – 23.0 |
| Ni | 23.0 – 28.0 |
| Mo | 4.0 – 5.0 |
| Cu | 1.0 – 2.0 |
| N | ≤ 0.10 |
| Fe | Balance |
Key Features of 904L / 1.4539 Flanges
- Excellent resistance to chloride pitting and crevice corrosion
- Superior performance in sulfuric acid and phosphoric acid environments
- Good weldability and formability
- Non-magnetic in the annealed condition
- Suitable for aggressive, high-chloride marine and chemical applications
Applications of 1.4539 Flanges
- Chemical Process Equipment
- Seawater and Brine Systems
- Pharmaceutical and Food Processing
- Heat Exchangers and Condensers
- Pulp & Paper and Petrochemical Plants
Why Choose our 1.4539 Flange?
- ✅ In-house forging and machining
- ✅ 100% PMI and hydro-tested flanges
- ✅ EN 10204 3.1 / 3.2 certification available
- ✅ Fast delivery and custom machining on request
- ✅ Export-ready packaging and global shipping
904L vs 1.4539 Super Stainless Steel
1.4539 is an European standard matrial.while 904L is available in ASTM Standard.
They have very close composition and property.basicially,they are interchangeable,you may refer to below comparsion.
904L vs 1.4539 Chemical Composition Differences
| Element | EN 10222-5 1.4539 (%) | ASTM SA182 F904L (%) |
|---|---|---|
| Carbon (C) | ≤ 0.020 | ≤ 0.020 |
| Manganese (Mn) | ≤ 2.00 | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.030 | ≤ 0.045 |
| Sulfur (S) | ≤ 0.010 | ≤ 0.035 |
| Silicon (Si) | ≤ 0.70 | ≤ 1.00 |
| Chromium (Cr) | 19.00 – 21.00 | 19.00 – 23.00 |
| Nickel (Ni) | 24.00 – 26.00 | 23.00 – 28.00 |
| Molybdenum (Mo) | 4.00 – 5.00 | 4.00 – 5.00 |
| Copper (Cu) | 1.20 – 2.00 | 1.00 – 2.00 |
| Nitrogen (N) | ≤ 0.15 | ≤ 0.10 |
904L vs 1.4539 Mechanical Properties Differences
| Property | EN 10222-5 1.4539 | ASTM SA182 F904L |
|---|---|---|
| Tensile Strength | 520 – 720 MPa | ≥490 MPa |
| Yield Strength (0.2%) | ≥ 220 MPa | ≥ 215 MPa |
| Elongation | ≥ 35% | ≥ 35% |
Contact us today for a quote or technical datasheet on X1NiCrMoCu25-20-5 / 1.4539 (904L) flanges. We manufacture to order with complete quality traceability and competitive pricing.
Download the specification of 1.4539 stainless steel
