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Material Specification

UNS S32760

UNS S32760 Fasteners
25Cr Super Duplex with Tungsten & Copper (EN 1.4501 / Zeron® 100 / F55)

Super Duplex Steel UNS S32760 Fasteners

Buy UNS S32760 (Zeron® 100 / DIN EN 1.4501 / ASTM A182 F55) bolts, studs, nuts, and high-integrity fasteners from Exotic Alloy, conforming to ASTM A1082, ASTM A276, ASTM A479, NORSOK M-630 MDS D57, and NACE MR0175. UNS S32760 is a highly alloyed super duplex steel containing intentional additions of tungsten (0.5-1.0%) and copper (0.5-1.0%), providing superior pitting and crevice corrosion resistance (PREN ≥ 42) and exceptional resistance to sulfuric and hydrochloric acids.

Exotic Alloy supplies UNS S32760 heavy hex bolts, all-thread studs, specialized marine bolting, and custom engineered fasteners across metric (M4 to M100) and imperial (1/4" to 4") sizes. It is the material of choice for aggressive marine environments, subsea umbilicals, sour gas systems, and chemical injection mandrels.

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UNS S32760 Bolting Products

UNS S32760 Specifications & Standards

  • ASTM A1082 / A276 / A479
  • UNS S32760 / F55
  • NACE MR0175 / ISO 15156
  • DIN EN ISO 10088-3 (1.4501)
  • X2CrNiMoCuWN25-7-4
  • NORSOK M-630 (MDS D57)
UNS S32760 Material Datasheet

UNS S32760 Properties

Chemical Composition (UNS S32760)
Elements C Mn P S Si Cr Ni Mo W Cu N
Min % - - - - - 24.00 6.00 3.00 0.50 0.50 0.20
Max % 0.030 1.00 0.030 0.010 1.00 26.00 8.00 4.00 1.00 1.00 0.30
Mechanical Properties (UNS S32760)
Condition / Heat Treatment Tensile Strength (MPa) Yield Strength (MPa) Elongation (%) Hardness
Solution Annealed (Bar / Fasteners) 750 - 1000 550 25 % 270 - 310 HB / 32 HRC

UNS S32760 Characteristics

  • Tungsten and copper additions enhance pitting, crevice, and acid corrosion resistance.
  • High yield strength (≥ 550 MPa) enabling significant component weight reduction.
  • Excellent resistance to stress corrosion cracking in both sour (H2S) and marine environments.
  • Outstanding resistance to cavitation, erosion, and high-velocity seawater impingement.
  • Full compliance with stringent NORSOK and oil major subsea specifications.

Applications

  • Subsea production systems, downhole tools, and riser clamp bolting.
  • Seawater injection pumps, brine coolers, and desalination plant hardware.
  • Sulfuric acid and organic acid process vessels.
  • Marine propeller shafts, thrusters, and rudder stock fasteners.
  • Pulp and paper bleaching plants and digester piping.