904L || 1.4539
Highly corrosion-resistant steel
904L is a highly corrosion-resistant type of austenitic steel with a high resistance to a large variety of organic and inorganic acids. It has a high resistance to pitting and stress corrosion.
Special stainless steel
This quality may be used also for chloride-containing media, seawater as well as for sulphuric and phosphoric acid solutions. 904L tends to hot cracking, but on the other hand the material is very well weldable using all procedures.
904L || 1.4539 applications
- Chemical industry
- Pharmaceutical industry
- Petrochemical industry
- Pulp / Paper industry
- Sea and seawater plants
- Shipbuilding
Chemical values – Reference analysis (weight proportion in %)
| Value | Proportion % |
|---|---|
| C | ≤ 0,02 |
| P | < 0,045 |
| S | ≤ 0,03 |
| Si | 0,7 |
| Mn | ≤ 2,0 |
| Cr | 19 – 21 |
| Mo | 4 – 5 |
| Ni | 24 – 26 |
| Cu | 1,0 – 2,0 |
| N | max. 0,15 |
Mechanical values at room temperature
| Tensile strength N/mm² | 520 – 720 |
| Tension elastic limit Rp 0,2 N/mm² | ≥ 220 |
| Breaking elongation A5 % | 35 |
Assignment to current and older standards
- Designation according to DIN: X 1 Ni Cr Mo Cu N
- ASTM Grade: 904 L
- EN: 1.4539
- ASME: 904 L
- AFNOR: X1NiCrMoCu 25-20-5
- SIS: 2562
- UNS: N 08904
- SEW 400(91´): 1.4539
- Vd TÜV 421: 1.4539
Tables and rates
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