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Material Specification

Zeron 100

Zeron 100 Fasteners
Proprietary W+Cu Super Duplex Stainless Steel (UNS S32760 / EN 1.4501)

Super Duplex Steel Zeron 100 Fasteners

Buy Zeron® 100 (UNS S32760 / DIN EN 1.4501 / Alloy 255W / F55) bolts, studs, nuts, and engineered fasteners from Exotic Alloy, conforming to ASTM A1082, ASTM A276, ASTM A479, NORSOK M-630, and NACE MR0175. Zeron 100 is a globally renowned 25% Cr super duplex stainless steel containing synergistic additions of tungsten (0.75%) and copper (0.75%), providing a guaranteed PREN ≥ 42 and exceptional resistance to marine fouling, sulfuric acid, and chloride pitting.

Exotic Alloy is a specialized manufacturer of Zeron 100 heavy hex bolts, socket cap screws, all-thread stud bolts, and custom machined bolting in metric (M4 to M100) and imperial (1/4" to 4") sizes. It is extensively deployed across offshore platforms, subsea equipment, flue-gas desulfurization (FGD) scrubbers, and marine defense systems.

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Zeron 100 Bolting Products

Zeron 100 Specifications & Standards

  • ASTM A1082 / A276 / A479
  • UNS S32760 / Zeron® 100
  • NACE MR0175 / ISO 15156
  • DIN EN ISO 10088-3 (1.4501)
  • X2CrNiMoCuWN25-7-4
  • NORSOK M-630 (MDS D57)
Zeron 100 Material Datasheet

Zeron 100 Properties

Chemical Composition (Zeron 100)
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 (Zeron 100)
Condition / Heat Treatment Tensile Strength (MPa) Yield Strength (MPa) Elongation (%) Hardness
Solution Annealed (Bar / Fasteners) 750 - 1000 550 25 % 270 - 310 HB / 32 HRC

Zeron 100 Characteristics

  • Proprietary tungsten and copper chemistry provides enhanced resistance to localized and acid attack.
  • High minimum yield strength of 550 MPa (80 ksi) with excellent impact ductility down to -50°C.
  • Guaranteed PREN ≥ 42 and MARC (Measure of Alloying for Resistance to Corrosion) compliance.
  • Immunity to chloride stress corrosion cracking under typical offshore conditions.
  • Proven track record in high-velocity seawater pumps, valves, and flowlines.

Applications

  • Offshore oil & gas subsea manifolds, wellhead valves, and riser clamps.
  • Flue-gas desulfurization (FGD) scrubbers and ducting bolting.
  • Seawater reverse-osmosis desalination high-pressure systems.
  • Marine defense systems, sonar domes, and propeller shafting.
  • Chemical industry sulfuric and hydrochloric acid handling systems.