Duplex Steel ASTM A479 UNS S32205 / A182 F60 Stud Bolt

Duplex Steel UNS S32205 A182 F60 Stud Bolts, Specifications & Dimensions

Duplex Steel UNS S32205 A182 F60 stud bolts are double-end threaded rods used in flanged-joint pressure-vessel and piping assemblies. TorqBolt manufactures Duplex Steel UNS S32205 A182 F60 stud bolts per ASTM A193 (alloy steel) / ASTM A453 (high-temperature) / EN 10269, in diameters from 1/4" to 4" and lengths from 25 mm to 3 m.

End Configurations

Thread & Length

Duplex Steel UNS S32205 A182 F60 stud bolt threads per ASME B1.1 (UNC for <1", 8UN for ≥1.125", per ASME B16.5 §A); ISO metric on request. Length under nut measured per ASME B16.5 Annex A. Standard end-chamfer 45° for thread protection in handling.

Mechanical & Certification

Duplex Steel UNS S32205 A182 F60 stud bolts ship with matching ASTM A194 nuts (2H, 7, 7M, 16 grades) per the parent stud spec. Each lot includes EN 10204 3.1 / 3.2 certificates with chemistry, mechanicals, hardness, and through-hardness traverse testing per ASTM A370. NACE MR0175 / ISO 15156 sour-service certification standard. Pre-stretched / pre-loaded studs supplied per customer specification.

Duplex & Super Duplex Stainless Steels

Duplex stainless steels have ~50/50 ferrite-austenite microstructure, doubling yield strength of 304/316 grades while improving chloride pitting resistance.

Duplex 2205 (UNS S32205) is standard with PREN ~35. Super Duplex 2507 (S32750) and Zeron 100 (S32760) push PREN to 41-42. SA-182 F51 / F53 / F55 / F60 are the ASME forged-flange equivalents.

Phase balance is critical: ferrite must stay 35-65% in weld + HAZ (ASTM A923 testing). Solution anneal at 1040-1100°C followed by water quench. Fasteners ship per ASTM A276 / A479 with EN 10204 3.1 / 3.2 certs including ferrite count and Charpy at -46°C.

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