904 L || 1.4539

Special stainless steel

904L || 1.4539

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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