Grade Profile

1.4410 / S32750 Welded Stainless Steel Tube

EHG manufactures welded stainless steel tube in grade 1.4410 (S32750) at our facility in Steinberg, Germany. A super duplex grade combining very high strength with outstanding resistance to chloride pitting and stress-corrosion cracking - used where 316-family grades aren’t enough.

Also Known As

1.4410 welded stainless steel tube is specified and sold internationally under several equivalent names:

EN (Kurzname) X2CrNiMoN25-7-4
ASTM / AISI (USA) S32750
UNS (USA) S32750
AISI (USA) F53
SS (Sweden) 2328
AFNOR (France) Z3CND25.07.AZ
Common / trade name Super Duplex 2507

Technical Data

EN 1.4410 / X2CrNiMoN25-7-4 — ASTM / AISI S32750.

Chemical Composition (% by mass, cast analysis)

Carbon (C) ≤ 0.030 %
Silicon (Si) ≤ 1.00 %
Manganese (Mn) ≤ 2.00 %
Phosphorus (P) ≤ 0.035 %
Sulfur (S) ≤ 0.015 %
Nitrogen (N) 0.2 - 0.35 %
Chromium (Cr) 24.0 - 26.0 %
Molybdenum (Mo) 3.00 - 4.5 %
Nickel (Ni) 6.0 - 8.0 %

Mechanical Properties (room temperature)

0.2 % proof strength (Rp0.2) ≥ 550 MPa
Tensile strength (Rm) 800 - 1000 MPa
Elongation after fracture (A, longitudinal) ≥ 20 %
Elongation after fracture (A, transverse) ≥ 20 %

Corrosion Resistance Index

PREN (Cr + 3.3×Mo + 16×N) 41.8 Seawater-resistant — meets the NACE MR0175 / ISO 15156 sour-service threshold (PREN ≥ 40)

Available Standards

1.4410 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 1.4410 / S32750 welded tubes:

  • Offshore oil & gas — risers, process piping and structural tube in highly saline environments.
  • Seawater desalination (SWRO) — high-pressure piping and heat exchangers.
  • Chemical tankers & processing — tube for the most aggressive chloride/acid duty.
  • Subsea structures — tube requiring both high strength and top-tier corrosion resistance.

Alloy Surcharge History

EUR/kg — February 2013 to September 2026

September 2026 (current) 5.42 €/kg
1.00 2.00 3.00 4.00 5.00 6.00 7.00 20132015201720192021202320252026 5.42 €/kg

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

Period€/kg
September 20265.42
August 20265.34
July 20265.34
June 20265.16
May 20264.93
April 20264.96

Last 12 Months

Period€/kg
September 20265.42
August 20265.34
July 20265.34
June 20265.16
May 20264.93
April 20264.96
March 20264.65
February 20264.39
January 20264.13
December 20254.31
November 20254.32
October 20254.34

Full history available at ehg-steinberg.de.

View full history as a table
PeriodAlloy surcharge (€/kg)
September 20265.42
August 20265.34
July 20265.34
June 20265.16
May 20264.93
April 20264.96
March 20264.65
February 20264.39
January 20264.13
December 20254.31
November 20254.32
October 20254.34
September 20254.21
August 20254.07
July 20254.11
June 20254.05
May 20254.23
April 20254.47
March 20254.54
February 20254.60
January 20254.57
December 20244.51
November 20244.44
October 20244.33
September 20244.40
August 20244.66
July 20244.83
June 20244.68
May 20244.41
April 20244.38
March 20244.24
February 20244.22
January 20244.01
December 20234.32
November 20234.66
October 20234.82
September 20234.73
August 20234.62
July 20234.86
June 20234.97
May 20235.24
April 20236.70
March 20237.07
February 20236.10
January 20235.39
December 20224.94
November 20224.94
October 20224.65
September 20224.39
August 20224.75
July 20225.16
June 20225.37
May 20225.83
April 20225.16
March 20224.53
February 20224.37
January 20224.35
December 20214.23
November 20214.08
October 20214.15
September 20214.03
August 20213.87
July 20213.46
June 20213.03
May 20212.91
April 20213.01
March 20212.88
February 20212.61
January 20212.46
December 20202.37
November 20202.26
October 20202.24
September 20202.09
August 20202.12
July 20202.18
June 20202.28
May 20202.18
April 20202.26
March 20202.41
February 20202.36
January 20202.34
December 20192.47
November 20192.80
October 20192.84
September 20192.69
August 20192.53
July 20192.58
June 20192.60
May 20192.67
April 20192.64
March 20192.47
February 20192.37
January 20192.50
December 20182.59
November 20182.61
October 20182.67
September 20182.75
August 20182.71
July 20182.81
June 20182.72
May 20182.59
April 20182.59
March 20182.50
February 20182.35
January 20182.23
December 20172.26
November 20172.16
October 20172.10
September 20171.91
August 20171.91
July 20172.11
June 20172.27
May 20172.44
April 20172.47
March 20172.35
February 20172.36
January 20172.13
December 20161.91
November 20161.81
October 20161.70
September 20161.75
August 20161.66
July 20161.60
June 20161.48
May 20161.34
April 20161.35
March 20161.30
February 20161.36
January 20161.39
December 20151.45
November 20151.47
October 20151.48
September 20151.61
August 20151.72
July 20151.90
June 20151.95
May 20152.03
April 20152.02
March 20152.06
February 20152.04
January 20152.04
December 20142.03
November 20142.12
October 20142.39
September 20142.33
August 20142.33
July 20142.44
June 20142.28
May 20141.97
April 20141.75
March 20141.75
February 20141.73
January 20141.68
December 20131.72
November 20131.65
October 20131.72
September 20131.73
August 20131.81
July 20131.95
February 20131.99

Need 1.4410 / S32750 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.