ALLOY-28

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Alloy 28 Chemical composition (nominal) % Alloy 28 Mechanical properties Alloy 28 Physical properties Alloy 28 Corrosion resistance Alloy 28 properties Alloy 28 equivalent

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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

Standard

• 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)

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. VdTÃœV-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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