Grade Profile

1.4539 / 904L Welded Stainless Steel Tube

EHG manufactures welded stainless steel tube in grade 1.4539 (904L) at our facility in Steinberg, Germany. A high-nickel super-austenitic grade with excellent resistance to sulfuric acid and chloride environments - a common upgrade path from 316-family grades.

Also Known As

1.4539 welded stainless steel tube is specified and sold internationally under several equivalent names:

EN (Kurzname) X1NiCrMoCu25-20-5
ASTM / AISI (USA) 904L
UNS (USA) N08904
SS (Sweden) 2562
AFNOR (France) Z1NCDU25.20
Common / trade name 904L

Technical Data

EN 1.4539 / X1NiCrMoCu25-20-5 — ASTM / AISI 904L.

Chemical Composition (% by mass, cast analysis)

Carbon (C) ≤ 0.020 %
Silicon (Si) ≤ 0.70 %
Manganese (Mn) ≤ 2.00 %
Phosphorus (P) ≤ 0.030 %
Sulfur (S) ≤ 0.010 %
Nitrogen (N) ≤ 0.15 %
Chromium (Cr) 19.0 - 21.0 %
Copper (Cu) 1.20 - 2.00 %
Molybdenum (Mo) 4.0 - 5.0 %
Nickel (Ni) 24.0 - 26.0 %

Mechanical Properties (room temperature)

0.2 % proof strength (Rp0.2) ≥ 220 MPa
1 % proof strength (Rp1.0) ≥ 250 MPa
Tensile strength (Rm) 520 - 720 MPa
Elongation after fracture (A, longitudinal) ≥ 35 %
Elongation after fracture (A, transverse) ≥ 30 %

Available Standards

1.4539 welded stainless steel tube from EHG can be ordered to the following standards:

General & mechanical engineering tube DIN EN 10296-2
Welded tube for pressure purposes DIN EN 10217-7
Food & pharmaceutical industry tube DIN EN 10357
Pipe classes for process plants DIN 21057-11
Corrosion-resisting steels (supplementary conditions) SEW 470
Welded pipe (USA) ASTM A312 / ASME SA-312
Boiler, superheater & heat-exchanger tube (USA) ASTM A249 / ASME SA-249

Typical Applications

What our customers build with 1.4539 / 904L welded tubes:

  • Sulfuric acid handling — process piping and vessels in acid plants.
  • Desalination & seawater — heat exchanger tube.
  • Chemical processing — an upgrade path from 316L for more aggressive media.

Alloy Surcharge History

EUR/kg — February 2013 to September 2026

September 2026 (current) 8.34 €/kg
2.00 4.00 6.00 8.00 10.00 12.00 20132015201720192021202320252026 8.34 €/kg

Drag across the chart to zoom in on a period — use "Reset zoom" to return to the full history.

Period€/kg
September 20268.34
August 20268.20
July 20268.47
June 20268.32
May 20267.79
April 20267.86

Last 12 Months

Period€/kg
September 20268.34
August 20268.20
July 20268.47
June 20268.32
May 20267.79
April 20267.86
March 20267.48
February 20267.10
January 20266.36
December 20256.62
November 20256.62
October 20256.60

Full history available at ehg-steinberg.de.

View full history as a table
PeriodAlloy surcharge (€/kg)
September 20268.34
August 20268.20
July 20268.47
June 20268.32
May 20267.79
April 20267.86
March 20267.48
February 20267.10
January 20266.36
December 20256.62
November 20256.62
October 20256.60
September 20256.42
August 20256.24
July 20256.38
June 20256.38
May 20256.64
April 20257.06
March 20257.12
February 20257.19
January 20257.16
December 20247.06
November 20247.15
October 20246.84
September 20246.92
August 20247.41
July 20247.98
June 20247.83
May 20247.23
April 20247.18
March 20246.76
February 20246.64
January 20246.43
December 20236.94
November 20237.49
October 20237.86
September 20237.82
August 20237.63
July 20238.06
June 20238.49
May 20238.83
April 202310.78
March 202311.86
February 202310.98
January 202310.04
December 20228.95
November 20228.73
October 20228.26
September 20227.93
August 20228.49
July 20229.63
June 20229.81
May 202211.78
April 202210.10
March 20228.34
February 20227.79
January 20227.55
December 20217.32
November 20216.99
October 20217.11
September 20216.93
August 20216.61
July 20215.98
June 20215.45
May 20215.18
April 20215.43
March 20215.43
February 20215.01
January 20214.75
December 20204.57
November 20204.31
October 20204.32
September 20203.97
August 20203.92
July 20203.93
June 20204.03
May 20203.76
April 20204.00
March 20204.33
February 20204.41
January 20204.38
December 20194.92
November 20195.55
October 20195.55
September 20194.97
August 20194.39
July 20194.26
June 20194.33
May 20194.55
April 20194.53
March 20194.19
February 20193.86
January 20193.97
December 20184.20
November 20184.34
October 20184.41
September 20184.64
August 20184.70
July 20184.96
June 20184.63
May 20184.36
April 20184.38
March 20184.26
February 20183.98
January 20183.66
December 20173.85
November 20173.52
October 20173.58
September 20173.19
August 20173.03
July 20173.18
June 20173.43
May 20173.76
April 20173.93
March 20173.72
February 20173.75
January 20173.79
December 20163.40
November 20163.19
October 20162.99
September 20163.16
August 20162.94
July 20162.66
June 20162.57
May 20162.34
April 20162.40
March 20162.27
February 20162.37
January 20162.44
December 20152.70
November 20152.75
October 20152.71
September 20153.04
August 20153.32
July 20153.66
June 20153.84
May 20153.90
April 20154.03
March 20154.09
February 20154.02
January 20154.13
December 20143.93
November 20144.15
October 20144.70
September 20144.57
August 20144.59
July 20144.71
June 20144.49
May 20143.77
April 20143.34
March 20143.22
February 20143.16
January 20143.06
December 20133.17
November 20133.06
October 20133.20
September 20133.25
August 20133.28
July 20133.56
February 20134.10

Need 1.4539 / 904L Welded Stainless Steel Tube?

Configure your dimensions and specification, or get in touch directly for a quote.

Configure Your Tube View Alloy Surcharge PDF

The technical data, standards references and alloy surcharge history on this page are provided for general information only. EHG makes no warranty as to their accuracy or completeness and accepts no liability for decisions made on this basis. Always verify current specifications against the applicable official standard (e.g. DIN EN 10088, EN 10095, ASTM/ASME) before using them for design, procurement or manufacturing.