Super Duplex 2507 Belleville disc springs
EN 16983ASTM A240
Super Duplex 2507 disc springs put super-duplex strength and resistance to chloride pitting into a flexing preload element. Working force, installed height and final material condition define the part more usefully than free diameter alone.
- 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
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 Super Duplex 2507
Single disc
Use under a fastener or in a preload mechanism when a short axial space must provide spring force. Select by load at working deflection, not by bore and outside diameter alone.
Series stack
Alternate disc orientation when a joint needs more travel to accommodate thermal movement or seating loss. Total travel increases at approximately the single-disc load; guides keep the stack aligned.
Parallel stack
Nest discs in the same orientation when the available travel is small but more spring force is needed. Load rises at approximately the single-disc deflection, with friction affecting the real load-deflection response.
- Form
- Conical disc
- Key dimensions
- Bore · Outside diameter · Thickness
- Spring definition
- Free height · Load–deflection
- Stacking
- Single · Series · Parallel
- Final condition
- Solution annealed and quenched
- Inspection
- Free height · Thickness · Load–deflection
Manufacturing route
Disc blanks are cut and formed to the required cone height; thickness and edge quality control stress distribution through the working travel.
Heat treatment & final condition
Solution treatment and cooling control the duplex structure. Subsequent processing must preserve the ordered corrosion and mechanical condition.
Working performance
Annealed corrosion-resistant stock is not automatically spring stock. The ordered temper or strengthening route must demonstrate the required recovery and load at working deflection.
Where Super Duplex 2507 fits — and what matters
Offshore & Marine
Deck-equipment brackets and marine pump skidsSuper Duplex 2507 disc spring / belleville washers form preload stacks in the bolted mounts of deck-equipment brackets and marine pump skids. Working deflection allows the stack to accommodate movement while maintaining the designed spring force. The assembled contact is exposed to saltwater, deposits and neighbouring metals.
Water Treatment & Desalination
Membrane-skid and pump supportsSuper Duplex 2507 disc spring / belleville washers form preload stacks in the bolted mounts of membrane-skid and pump supports. Working deflection allows the stack to accommodate movement while maintaining the designed spring force. The water stream, cleaning cycle and retained liquid define exposure at the installed part.
Oil & Gas
Utility skids and instrument supportsSuper Duplex 2507 disc spring / belleville washers form preload stacks in the bolted mounts of utility skids and instrument supports. Working deflection allows the stack to accommodate movement while maintaining the designed spring force. Utility connections and pressure-boundary parts have separate acceptance requirements on the equipment drawing.
Same disc spring. Different material priorities.
Super Duplex 2507 material dataInconel X-750
Age-hardened strength and a choice of hot-service heat treatments.
- Connection priority
- Force at working deflection and relaxation during dwell
- Spring treatment versus bolting treatment
- X-750 has several heat-treatment routes. The route for retained spring force is selected around relaxation and working stress; a bolting strength requirement calls for its own specified condition. At the loaded disc faces and stack contact edges, the relevant metal temperature can differ from the process or furnace set point.
Inconel 718
Precipitation-hardened strength for compact, highly loaded connections.
- Connection priority
- Force at working deflection and relaxation during dwell
- Strength after aging
- Machine-stock properties and final aged properties describe different states. The final heat-treatment lot and mechanical results establish the strength available in the installed part. At the loaded disc faces and stack contact edges, the relevant metal temperature can differ from the process or furnace set point.
Inconel 625
Solid-solution strength and resistance to aggressive process liquids.
- Connection priority
- Force at working deflection and relaxation during dwell
- 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 loaded disc faces and stack contact edges 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
- UNS S32750 · heat number · ordered condition
- Final-part acceptance
- Final condition and any ordered phase-balance, corrosion or impact testing. Load–deflection and permanent-set results for the specified spring geometry.
- Dimensional record
- Free height · Thickness · Load–deflection
- Traceability
- EN 10204 3.1 material certificate · production lot · identified packing
Build your Super Duplex 2507 disc spring enquiry
Questions about Super Duplex 2507 disc spring / belleville washers
Can an alloy change preserve the same disc-spring rating?
Elastic modulus, yield behaviour and final condition influence the load–deflection curve. Recalculate and verify the working response for the selected alloy rather than carrying over a same-size steel disc’s rating.