® 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

Standards

  • 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, EN 10272, SS 14 25 84
Fittings: ASTM A 403 (chemical composition and mechanical properties according to ASTM B668)

Approvals

  • 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 (sulfide stress cracking resistant material for oil field equipment)

 

 

 

 

Captions=Figure 10. A compilation of laboratory test data and practical results for different stainless steels in aerated (about 8 ppm 0<sub>2</sub>), aqueous chloride environments.