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Alloy 28 Forms of supply

Seamless tube – Finishes and dimensions

Seamless tube and pipe is supplied in dimensions up to 260 mm outside diameter in the solution annealed and white-pickled condition, or solution annealed in a bright annealing process. Seamless tubes are available from stock in ANSI pipe and heat exchanger tube sizes. Details of our manufacturing and stock programme are given in catalogue S-110-ENG.

Using modern bending equipment, can bend tubes to customers' particular requirements and, if required, anneal after bending.

Materials for oil and gas production

Cold worked seamless tube and pipe

For production tubing and casing in oil and gas production. Alloy 28 is supplied cold worked with high strength properties (Alloy 28-110 and Alloy 28-125). Specific Oil and Gas information is available on request.

Other forms of supply

  • Welded tube and pipe
  • Welding wire and wire electrodes
  • Covered electrodes
  • Strip, annealed or cold rolled to different degrees of hardness
  • Wire, drawn or ground
  • Bar steel
  • Plate and sheet
  • Forged products
  • Cast products
  • Fittings

Further details concerning sizes and finishes are available on request.


Alloy 28 (Tube and Pipe, Seamless)

Datasheet updated 2015-02-16 10:39:36 (supersedes all previous editions)

Alloy 28 is a high-alloy multi-purpose austenitic stainless steel for service in highly corrosive conditions. The grade is characterized by:

  • Very high corrosion resistance in strong acids
  • Very good resistance to stress corrosion cracking (SCC) and intergranular corrosion in various environments
  • High resistance to pitting and crevice corrosion
  • Good weldability


  • UNS N08028
  • ISO 4563-080-28-I
  • EN number 1.4563
  • EN name X 1 NiCrMoCu 31-27-4
  • W.Nr. 1.4563
  • DIN X 1 NiCrMoCuN 31 27 4
  • SS 2584
  • AFNOR Z1NCDU31-27-03

Product standards

Seamless tube and pipe: ASTM B 668; EN 10216-5; SEW 400 (Feb 1991); SS 14 25 84;
NFA 49-217
Plate, sheet and strip: ASTM B 709, EN 10088-2; SS 14 25 84
Bar steel: EN 10088-3; SS 14 25 84
Fittings: ASTM A 403 (chemical composition and mechanical properties according to ASTM B668)


  • Approved by the American Society of Mechanical Engineers (ASME) for use in accordance with ASME Boiler and Pressure Vessel Code, section III, section I (Code Case 1325-18) and section VIII, division 1.
  • VdTÜV-Werkstoffblatt 483 (Austenitischer Walz- und Schmiedestahl)
  • NACE MR 0103 (Materials Resistant to Sulfide Stress Cracking in Corrosive Petroleum Refining Environments)
  • NACE MR0175/ISO 15156 (sulphide stress cracking resistant material for oil field equipment)
  • NGS 1608 (Nordic rules for application) valid for Alloy 28 made by


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