Special alloy disc spring / belleville washers
Where a joint needs spring travel within limited axial space, specify the working load and deflection together. Single discs and series or parallel stacks provide different responses for valve, clamp and preload assemblies, with alloy selection tied to temperature and media.
- Form
- Conical disc
- Key dimensions
- Bore · Outside diameter · Thickness
- Spring definition
- Free height · Load–deflection
- Stacking
- Single · Series · Parallel
- Materials
- Nickel alloys · Stainless steels
EN 10204 3.1 MTC · Heat traceability
Disc spring / Belleville washers material selection
Equipment & applications
Actuator mountings
Preload actuator mechanisms through a compact spring stack. Series arrangements provide more travel; nested discs increase force within the available axial space.
Assembly fixtures
Maintain clamp force while a fixture moves through a small working stroke. The selected load-deflection curve sets the clamp force at its installed height.
Heated tooling
Accommodate expansion in heated clamping assemblies. Available disc travel takes up small dimensional changes, while spring alloy and condition control load retention at temperature.
Disc spring / Belleville washers configurations & dimensions
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.
Dimension guide
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Product standards & dimensional specifications
Raw Material Specifications
Other Materials & Specifications
Dimension Reference
Production & heat treatment
Blanking & Edge Preparation
Annular blanks are cut from sheet or strip. Thickness, bore and outside diameter control the spring calculation, while smooth edges remove local notches before conical forming.
Cold Pressing / Hot Forming
Thin, ductile blanks usually take their cone shape by cold pressing. Thick discs and high forming resistance favour hot forming or staged forming with intermediate annealing to avoid excessive force and edge cracking.
Heat Treatment For Spring Load
Inconel X-750 and A-286 develop spring strength through precipitation hardening. The treatment is selected with the starting temper and operating temperature to control permanent set and load relaxation; soft annealed stock alone does not define a finished spring condition.
Setting & Load Testing
The finished disc is checked for free height and load at defined deflections. Setting stabilises the working shape, while the load test verifies the response of a single disc before a series or parallel stack is assembled.
Testing, MTC 3.1 & material traceability
Material certificate
Inconel 625 · historical coil-wire sample
Laboratory report
Inconel 718 · chemistry, tensile & hardness
Identified packing
Heat and batch records linked to the shipment
Additional inspection requirements +
PMI, third-party inspection and witness testing are available by order. Project inspection plans can include UT/PT and heat-treatment records.
Matching products for disc spring / belleville washers
Prepare your enquiry
- Material
- Grade / UNS · Condition
- Size
- Bore · Diameter · Thickness
- Geometry
- Profile · Free height
- Quantity
- Pieces per size