Duplex 2205 Set screws
ISO 4026 / ISO 4027ASTM A276
Duplex 2205 set screws put duplex strength and chloride-corrosion resistance at a small, highly loaded shaft contact. Point style and the final hardness determine whether that contact locates, clamps or indents the mating part.
- 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
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
Flat point
Use for repeated adjustment against a flat or pad where deep penetration is unwanted. A prepared flat on the shaft gives more stable seating than contact on a round surface.
Cone point
Use for positive location in a prepared dimple on a shaft or collar. The concentrated tip contact can mark the component, making it less suitable for frequent repositioning on a finished shaft.
Dog point
Use the cylindrical tip in a hole or guide slot to locate a collar or restrict travel. Control tip diameter and projection to avoid binding or bottoming in the mating feature.
Cup point
Use on shaft collars and hubs where the cup edge can bite into the shaft to resist slip. Expect a contact mark; use a prepared seat when repeated removal and repositioning matter.
- Drive
- Internal hex socket
- Point forms
- Flat · Cone · Dog · Cup
- Length basis
- Overall length
- Threads
- Metric · Inch
- Final condition
- Solution annealed and quenched
- Inspection
- Point geometry · Overall length · Socket · Threads
Manufacturing route
CNC machining suits small lots and special points. The socket and flat, cup, cone or dog point are produced as functional features on the same axis.
Heat treatment & final condition
Solution treatment and cooling control the duplex structure. Subsequent processing must preserve the ordered corrosion and mechanical condition.
Finished geometry
The point is checked for geometry and surface damage; a corrosion-resistant alloy does not automatically provide a hardened biting edge.
Where Duplex 2205 fits — and what matters
Offshore & Marine
Marine pump shafts and linkage pinsDuplex 2205 set screws lock collars or hubs to marine pump shafts and linkage pins. Cup, cone, flat and dog points transfer load through different shaft contacts or locating features. The assembled contact is exposed to saltwater, deposits and neighbouring metals.
Water Treatment & Desalination
Treatment-pump shafts and actuator partsDuplex 2205 set screws lock collars or hubs to treatment-pump shafts and actuator parts. Cup, cone, flat and dog points transfer load through different shaft contacts or locating features. The water stream, cleaning cycle and retained liquid define exposure at the installed part.
Oil & Gas
Valve actuator shafts and linkage pinsDuplex 2205 set screws lock collars or hubs to valve actuator shafts and linkage pins. Cup, cone, flat and dog points transfer load through different shaft contacts or locating features. Utility connections and pressure-boundary parts have separate acceptance requirements on the equipment drawing.
Same set screw. Different material priorities.
Duplex 2205 material dataInconel 625
Solid-solution strength and resistance to aggressive process liquids.
- Connection priority
- Local contact pressure at the point
- 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 point against the shaft and the blind drive recess in the exposure description.
Super Duplex 2507
Super-duplex strength and resistance to chloride pitting.
- Connection priority
- Local contact pressure at the point
- 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 point against the shaft and the blind drive recess in the exposure description.
Monel K-500
Age-hardened strength in the nickel–copper alloy family.
- Connection priority
- Local contact pressure at the point
- 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 point against the shaft and the blind drive recess 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
- Point geometry · Overall length · Socket · Threads
- Traceability
- EN 10204 3.1 material certificate · production lot · identified packing
Build your Duplex 2205 set screw enquiry
Questions about Duplex 2205 set screws
Should point hardness always be maximised?
A very hard point can damage a softer shaft, while a soft point can flatten on a hard surface. The point geometry, shaft hardness and required holding or locating function determine the useful combination.