Grade Profile

1.4529 / N08926 Welded Stainless Steel Tube

EHG manufactures welded stainless steel tube in grade 1.4529 (N08926) at our facility in Steinberg, Germany. A high-nickel, high-molybdenum super-austenitic grade for the most demanding chloride and acid environments - used where even 254 SMO isn’t enough.

Also Known As

1.4529 welded stainless steel tube is specified and sold internationally under several equivalent names:

EN (Kurzname) X1NiCrMoCuN25-20-7
ASTM / AISI (USA) N08926
UNS (USA) N08926
Common / trade name 926

254 SMO® is a registered trademark of Outokumpu, referenced here only as an equivalent/comparison designation. EHG is not affiliated with, sponsored by, or endorsed by Outokumpu.

Technical Data

EN 1.4529 / X1NiCrMoCuN25-20-7 — ASTM / AISI N08926.

Chemical Composition (% by mass, cast analysis)

Carbon (C) ≤ 0.020 %
Silicon (Si) ≤ 0.50 %
Manganese (Mn) ≤ 1.00 %
Phosphorus (P) ≤ 0.030 %
Sulfur (S) ≤ 0.010 %
Nitrogen (N) 0.15 - 0.25 %
Chromium (Cr) 19.0 - 21.0 %
Copper (Cu) 0.50 - 1.50 %
Molybdenum (Mo) 6.0 - 7.0 %
Nickel (Ni) 24.0 - 26.0 %

Mechanical Properties (room temperature)

0.2 % proof strength (Rp0.2) ≥ 300 MPa
1 % proof strength (Rp1.0) ≥ 340 MPa
Tensile strength (Rm) 600 - 800 MPa
Elongation after fracture (A, longitudinal) ≥ 40 %
Elongation after fracture (A, transverse) ≥ 40 %

Corrosion Resistance Index

PREN (Cr + 3.3×Mo + 16×N) 44.7 Seawater-resistant — meets the NACE MR0175 / ISO 15156 sour-service threshold (PREN ≥ 40)

Available Standards

1.4529 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 1.4529 / N08926 welded tubes:

  • Flue gas desulfurization — ducting and components in hot, chloride- and sulfate-laden gas.
  • Phosphoric acid production — tube resisting highly aggressive acid media.
  • Seawater handling — heat exchangers in the most demanding chloride environments.

Alloy Surcharge History

EUR/kg — February 2013 to September 2026

September 2026 (current) 9.77 €/kg
2.00 4.00 6.00 8.00 10.00 12.00 14.00 20132015201720192021202320252026 9.77 €/kg

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

Period€/kg
September 20269.77
August 20269.59
July 20269.81
June 20269.56
May 20268.98
April 20269.07

Last 12 Months

Period€/kg
September 20269.77
August 20269.59
July 20269.81
June 20269.56
May 20268.98
April 20269.07
March 20268.59
February 20268.09
January 20267.32
December 20257.66
November 20257.67
October 20257.69

Full history available at ehg-steinberg.de.

View full history as a table
PeriodAlloy surcharge (€/kg)
September 20269.77
August 20269.59
July 20269.81
June 20269.56
May 20268.98
April 20269.07
March 20268.59
February 20268.09
January 20267.32
December 20257.66
November 20257.67
October 20257.69
September 20257.44
August 20257.20
July 20257.34
June 20257.30
May 20257.61
April 20258.09
March 20258.16
February 20258.26
January 20258.21
December 20248.11
November 20248.16
October 20247.85
September 20247.94
August 20248.51
July 20249.08
June 20248.85
May 20248.19
April 20248.16
March 20247.71
February 20247.61
January 20247.29
December 20237.92
November 20238.59
October 20239.02
September 20238.95
August 20238.69
July 20239.14
June 20239.57
May 202310.04
April 202312.67
March 202313.83
February 202312.43
January 202311.17
December 20229.95
November 20229.71
October 20229.10
September 20228.67
August 20229.35
July 202210.49
June 202210.72
May 202212.67
April 202210.95
March 20229.16
February 20228.61
January 20228.37
December 20218.15
November 20217.80
October 20217.94
September 20217.73
August 20217.41
July 20216.64
June 20215.92
May 20215.62
April 20215.89
March 20215.84
February 20215.37
January 20215.10
December 20204.92
November 20204.63
October 20204.63
September 20204.24
August 20204.21
July 20204.25
June 20204.39
May 20204.12
April 20204.40
March 20204.77
February 20204.79
January 20204.75
December 20195.29
November 20196.02
October 20196.04
September 20195.46
August 20194.88
July 20194.76
June 20194.84
May 20195.07
April 20195.04
March 20194.66
February 20194.34
January 20194.47
December 20184.71
November 20184.83
October 20184.91
September 20185.15
August 20185.15
July 20185.43
June 20185.12
May 20184.84
April 20184.87
March 20184.74
February 20184.40
January 20184.02
December 20174.18
November 20173.85
October 20173.89
September 20173.47
August 20173.29
July 20173.45
June 20173.76
May 20174.11
April 20174.23
March 20173.99
February 20174.01
January 20174.03
December 20163.63
November 20163.43
October 20163.22
September 20163.39
August 20163.17
July 20162.91
June 20162.76
May 20162.48
April 20162.53
March 20162.41
February 20162.51
January 20162.55
December 20152.80
November 20152.87
October 20152.85
September 20153.19
August 20153.49
July 20153.88
June 20154.06
May 20154.16
April 20154.27
March 20154.36
February 20154.29
January 20154.39
December 20144.22
November 20144.46
October 20145.08
September 20144.95
August 20144.97
July 20145.15
June 20144.87
May 20144.07
April 20143.58
March 20143.47
February 20143.40
January 20143.30
December 20133.41
November 20133.28
October 20133.43
September 20133.48
August 20133.55
July 20133.85
February 20134.42

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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.