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Material Specification

UNS S32750

UNS S32750 Fasteners
2507 Super Duplex Stainless Steel (EN 1.4410 / Alloy 2507 / F53)

Super Duplex Steel UNS S32750 Fasteners

Buy UNS S32750 (Alloy 2507 / DIN EN 1.4410 / ASTM A182 F53) bolts, studs, nuts, and engineered fasteners from Exotic Alloy, conforming to ASTM A1082, ASTM A276, ASTM A479, and NACE MR0175 / ISO 15156. UNS S32750 is a 25% chromium, 7% nickel, 4% molybdenum super duplex alloy specifically engineered for extreme mechanical and corrosive environments, delivering a guaranteed Pitting Resistance Equivalent Number (PREN) ≥ 42.

Exotic Alloy manufactures UNS S32750 heavy hex bolts, socket head cap screws, double-end stud bolts, and custom CNC machined bolting in metric (M4 to M100) and imperial (1/4" to 4") sizes. It provides exceptional resistance to chloride stress corrosion cracking, pitting attack in warm seawater, and high mechanical fatigue strength.

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UNS S32750 Bolting Products

UNS S32750 Specifications & Standards

  • ASTM A1082 / A276 / A479
  • UNS S32750 / Alloy 2507
  • NACE MR0175 / ISO 15156
  • DIN EN ISO 10088-3 (1.4410)
  • X2CrNiMoN25-7-4 / F53
  • ISO 3506-1
UNS S32750 Material Datasheet

UNS S32750 Properties

Chemical Composition (UNS S32750)
Elements C Mn P S Si Cr Ni Mo N Cu
Min % - - - - - 24.00 6.00 3.00 0.24 -
Max % 0.030 1.20 0.035 0.020 0.80 26.00 8.00 5.00 0.32 0.50
Mechanical Properties (UNS S32750)
Condition / Heat Treatment Tensile Strength (MPa) Yield Strength (MPa) Elongation (%) Hardness
Solution Annealed (Bar / Fasteners) 750 - 1000 550 15 - 25 % 310 HB / 32 HRC

UNS S32750 Characteristics

  • Guaranteed high pitting and crevice corrosion resistance with PREN ≥ 42.
  • High minimum yield strength (550 MPa / 80 ksi), nearly triple that of 316L.
  • Exceptional resistance to chloride-induced stress corrosion cracking in sour environments.
  • High resistance to erosion-corrosion and mechanical fatigue.
  • Lower coefficient of thermal expansion and higher thermal conductivity than austenitic alloys.

Applications

  • Subsea Christmas tree manifolds, risers, and flowline connectors.
  • Seawater reverse-osmosis desalination high-pressure piping and bolting.
  • Offshore oil & gas production platforms and marine hardware.
  • Chemical and petrochemical process heat exchangers and pressure vessels.
  • Flue-gas desulfurization (FGD) scrubbers and acid neutralization equipment.