SAF™ 2507 is a super-duplex (austenitic-ferritic) stainless steel for service in highly corrosive conditions. The grade is characterized by:
Excellent resistance to stress corrosion cracking (SCC) in chloride-bearing environments
Excellent resistance to pitting and crevice corrosion
High resistance to general corrosion
Very high mechanical strength
Physical properties that offer design advantages
High resistance to erosion corrosion and corrosion fatigue
Good weldability
Standards
UNS: S32750
EN Number: 1.4410
EN Name: X 2 CrNiMoN 25-7-4
SS: 2328
Product standards
Seamless tube and pipe: EN 10216-5
Seamless and welded tube and pipe: ASTM A789; A790
Flanges: ASTM A182
Fittings: ASTM A182; (ASTM A815 applied for)
Plate, sheet and strip: ASTM A240, EN 10088-2
Bar steel: ASTM A479, EN 10088-3
Forged billets: EN 10088-3
Approvals
Approved by the American Society of Mechanical Engineers (ASME) for use in accordance with ASME Boiler and Pressure Vessel Code, Section VIII, div. 1. There is no approval for UNS S32750 in the form of plate. However, according to ASME paragraph UG-15, the design values for seamless tube according to ASME Section VIII, div. 1 are also allowed to be used for plate.
ASME B31.3 Chemical Plant and Petroleum Refinery piping
VdTÜV-Werkstoffblatt 508
NACE MR0175/ISO 15156 (Petroleum and natural gas industries - Materials for use in H2S-containing Environments in oil and gas production - Part 3: Cracking-resistant CRAs (corrosion resistant alloys and other alloys) (Published:2015)