Duplex 2205 Double-end studs
ASME B18.31.2ASTM A276
A Duplex 2205 double-end stud leaves the installed end in the equipment body while the service nut is removed. Its duplex strength and chloride-corrosion resistance must cover the trapped body-end interface as well as the exposed end.
- MOQ
- 100PCS
- Samples · typical
- ~20 days
- Production · typical
- 25–35 days
- Heat treatment
- Solution annealed and quenched
EN 10204 3.1 MTC + heat-number traceability
Which standard is on your order?
Raw Material Specifications
Finished-Stud Specifications
Threads · Metric
Threads · Inch
Dimension Reference
Heat Treatment
Solution annealed and rapidly cooledSolution annealing followed by rapid cooling controls harmful precipitates and preserves the ferrite–austenite structure.
What we can make in Duplex 2205
Clamping stud
Use for through-bolted covers and housings with access to both nuts. The plain grip spans the joint; independently sized threaded ends accommodate unequal nut-side clearances.
Tap-end stud
Use on valve bonnets and machine housings opened repeatedly for maintenance. The insertion end remains in the body while the outer nut is removed, reducing repeated wear of the housing thread.
- Thread systems
- Metric · UNC · UNF · 8UN · UNJ
- Geometry
- Two threaded ends · Plain shank
- Assembly
- Nut-to-nut · Tap-end
- Final condition
- Solution annealed and quenched
- Inspection
- End thread lengths · Shank diameter · Thread gauging
Manufacturing route
CNC machining suits samples and special end forms. Repeat lots use cut-to-length stock with rolling or cutting selected for the ordered thread and material condition.
Heat treatment & final condition
Solution treatment and cooling control the duplex structure. Subsequent processing must preserve the ordered corrosion and mechanical condition.
Finished geometry
End lengths, runout and effective thread engagement are checked separately from overall length; tap ends are gauged to their own fit requirement.
Where Duplex 2205 fits — and what matters
Offshore & Marine
Seawater pump and cooling-system coversDuplex 2205 double-end studs connect seawater pump and cooling-system covers through a threaded body end and an accessible nut end. The plain shank spans the cover grip. The assembled contact is exposed to saltwater, deposits and neighbouring metals.
Water Treatment & Desalination
Filter housings and treatment-pump coversDuplex 2205 double-end studs connect filter housings and treatment-pump covers through a threaded body end and an accessible nut end. The plain shank spans the cover grip. The water stream, cleaning cycle and retained liquid define exposure at the installed part.
Oil & Gas
Process valves and equipment closuresDuplex 2205 double-end studs connect process valves and equipment closures through a threaded body end and an accessible nut end. The plain shank spans the cover grip. Utility connections and pressure-boundary parts have separate acceptance requirements on the equipment drawing.
Same double-end stud. Different material priorities.
Duplex 2205 material dataInconel 625
Solid-solution strength and resistance to aggressive process liquids.
- Connection priority
- Tension through the grip and load transfer into the housing
- Annealed or solution-annealed 625
- The delivery condition affects strength and high-temperature response. Keep the specified condition with the component’s mechanical acceptance; 718-style aging is not the strengthening route for 625. Include liquid retained at the body-end thread inside the tapped housing in the exposure description.
Super Duplex 2507
Super-duplex strength and resistance to chloride pitting.
- Connection priority
- Tension through the grip and load transfer into the housing
- Final duplex structure
- S32750 chemistry and final solution treatment belong together. Forming, section size and cooling affect the structure represented by the mechanical and corrosion records. Include liquid retained at the body-end thread inside the tapped housing in the exposure description.
Monel K-500
Age-hardened strength in the nickel–copper alloy family.
- Connection priority
- Tension through the grip and load transfer into the housing
- Strength and hydrogen exposure
- K-500 gains strength through aging. Cathodic protection, hydrogen exposure and the ordered condition need joint consideration in highly loaded marine components. Include liquid retained at the body-end thread inside the tapped housing in the exposure description.
From drawing to documented delivery
- 01Drawing & BOMForm, dimensions and quantity
- 02Material & formingGrade, heat and manufacturing route
- 03Final inspectionGeometry, threads and ordered tests
- 04Documents & dispatchLot records and identified packing
Order documents
- Material identity
- S31803 / S32205 · heat number · ordered condition
- Final-part acceptance
- Final condition and any ordered phase-balance, corrosion or impact testing.
- Dimensional record
- End thread lengths · Shank diameter · Thread gauging
- Traceability
- EN 10204 3.1 material certificate · production lot · identified packing
Build your Duplex 2205 double-end stud enquiry
Questions about Duplex 2205 double-end studs
Can both ends use the same thread designation?
They can, but the body end may require a different fit or engagement from the nut end. Record each end separately, including a different pitch or interference requirement where the equipment drawing uses one.