Super Duplex 2507 Fasteners

SAF 2507 Bolting, Stud Bolts, Nuts, Cap Screws, Threaded Rod, Washers

Super Duplex 2507 Scope

SAF 2507 Fasteners are super-duplex stainless steel fasteners with a PREN value of min. 42*. SAF 2507 Stud Bolts are characterized by very good chloride corrosion resistance, combined with very high mechanical strength. SAF 2507 Nuts & Bolts are particularly suited for use in aggressive environments such as warm chlorinated seawater and acidic, chloride containing media. SAF 2507 Nuts are suitable for service in highly corrosive conditions and where high strength is required, the properties of Sandvik SAF 2507® are being widely used in offshore oil and gas exploration and production and in heat exchangers in petrochemical and chemical processing. The grade is also suitable for hydraulic and instrumentation applications in tropical marine environments.
Using Duplex 2507 must be restricted to applications below 600° F (316° C). Extended elevated temperature exposure can reduce both the toughness and corrosion resistance of alloy 2507.
Duplex 2507 has good mechanical properties. Often a light gauge of 2507 material can be used to achieve the same design strength of a thicker nickel alloy. The resulting weight savings can considerably reduce the overall cost of fabrication.

Related Specifications of SAF 2507 Fasteners

A1082 A182 A479 A276 A240 ISO 3506-1 ISO 3506-2

Super Duplex SAF 2507 Equivalent Designations

Steel Number Steel Designation UNS SS Trade Name AFNOR
1.4410 X2CrNiMoN25-7-4 S32750 2328 25Cr-7Ni-Mo-N. Z3 CN 25.06 Az

    SAF 2507 Fasteners Characteristics

  • High resistance to chloride stress corrosion cracking.
  • High Strength.
  • Combination of properties given by austenitic and ferritic structure.
  • Good weldability and workability.
  • Superior resistance to chloride pitting and crevice corrosion.
  • Good general corrosion resistance.
  • Suggested for applications up to 60

SAF 2507 Fasteners Applications

  • Desalination Equipment.
  • Chemical process pressure vessels, piping and heat exchangers.
  • Marine Applications.
  • Flue Gas Scrubbing Equipment.
  • Pulp & Paper Mill Equipment.
  • Offshore Oil production/technology.
  • Oil and gas industry equipment.

SAF 2507 Fasteners Products

SAF 2507 Bolts SAF 2507 Screws SAF 2507 Nuts SAF 2507 Washers
SAF 2507 Stud Bolts SAF 2507 Threaded Rod SAF 2507 Forgings SAF 2507 Bolting

SAF 2507 Fasteners Chemical Composition

Element Chromium(Cr) Nickel(Ni) Molybdenum(Mo) Manganese(Mn) Silicon(Si) Copper(Cu) Nitrogen(N) Phosphorous(P) Carbon(C) Sulfur(S) Iron(Fe)
Content (%) 24 - 26 6 - 8 3 - 5 1.20 max 0.80 max 0.50 max 0.24 - 0.32 0.035 max 0.030 max 0.020 max Balance

SAF 2507 Mechanical Properties

0.2% Offset Yield Strength, ksi 80 min.
Ultimate Tensile Strength, ksi 116 min.
1% Offset Yield Strength, ksi 91 min.
Elongation in 2 inches, % 15 min.
Hardness, Rockwell C 32 max.
Impact Energy, ft-lbs 74 min.

SAF 2507 Fasteners Coatings

Super Duplex Fasteners Grades

  • Zeron 100 FG/FLT/SA
  • Ferralium 255
  • ASTM A276 UNS S32750
  • ASTM A276 UNS S32760
  • ASTM A182 F53
  • ASTM A182 F55