® 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)