An Inconel 718 turbine disk carries rotor load through its rim, web and bore. The age-hardenable nickel alloy provides a material system whose properties depend on the specified product form and thermal condition. Critical dimensions and surfaces must then be created without losing the material pedigree behind the blank. ForceBeyond supports custom 718 disk manufacturing and supply, from a defined blank or customer-supplied forging to a coordinated finished-part proposal.
Define your 718 disk deliverable. Send the disk drawing, material and forging specification, final condition and release requirements, with quantity and schedule. Request a custom quote.
Special Metals’ bulletin describes solution treatment and precipitation hardening of 718. A disk drawing must reference the correct product specification and final condition; a nominal alloy certificate alone does not establish the forging structure or the required mechanical response. Properties taken from a sheet or another thermal condition cannot automatically serve as disk allowables.
| Definition | Technical purpose | Evidence to retain |
|---|---|---|
| UNS N07718 alloy identity | Names the alloy system | Chemistry and material certification. |
| Wrought blank specification | Defines required product form and condition | Forging/melt traceability and specified tests. |
| Final thermal condition | Controls the age-hardening response | Approved cycle and acceptance records. |
| Finished disk drawing | Sets geometry and critical surfaces | Bore/rim reports and required NDT. |
The alloy designation and precipitation description are supported by the producer reference. The customer’s actual forging standard and revision control the purchase.
The blade attachments introduce load into the rim; the web carries it toward the bore or shaft interface. Fillets and attachment transitions can be fatigue-sensitive, while faces and pilots establish axial and radial location. Their finished relationship is the reason datum transfer matters between the blank, rough machining and final machining.
Surface condition around slots, holes and bore transitions should be specified where the design depends on it. Material integrity, geometric runout and mass balance are different acceptance subjects. None can replace the others by inference.
The 718 forging resource explains a related wrought route. For a particular disk, the qualified blank must retain the required stock and identification through rough machining and thermal processing. Final cutting and inspection establish the attachment, bore and face dimensions in the stated condition.
The inspection plan may include specified material tests, internal or surface NDT and dimensional reporting. Method, coverage and acceptance must follow the part specification. A machining quote should state who supplies the qualified blank and which upstream records accompany it.
For a disk specified as wrought 718, confirm the approved melt and forging product form before sizing the blank. Preserve forging and heat identity through rough bore, web and rim machining; apply the prescribed solution and aging route, then finish the bore, faces, attachment and fillets against the final datum scheme. The producer's condition-dependent properties explain why a generic 718 certificate is insufficient, but the actual disk acceptance comes from its governing product and rotor specifications.
Check critical surfaces and required internal soundness in the specified sequence, then measure final bore-to-rim relationships and runout after any process that can change geometry. The René 95 comparison is a powder-route and fatigue-evidence topic; it does not transfer its PM acceptance criteria to a wrought 718 forging.
The René 95 benchmark discusses powder-processing and fatigue research. It is a different material/route evaluation, not a substitution recommendation for this 718 disk. Temperature, loading cycle, dwell and crack-growth requirements must be assessed using data for the actual product condition.
ForceBeyond can coordinate the defined material, forging and machining supply scope. Program-specific processor approvals and capacity require confirmation before production commitment. A release package should connect drawing revision, material identity, thermal history, critical dimensions and required NDT.
For a custom quote, define blank-only, rough-machined or finished-disk delivery. Add the governing specifications, quantities, tooling status and schedule. Balance or overspeed verification should be a separately defined obligation where the rotor design requires it.
The alloy name identifies chemistry, while the product specification and thermal condition establish the required material form and acceptance. A disk also needs the structure and tests prescribed by its design.
It is the controlled relationship between intermediate locating features and the final bore, faces and attachment geometry. It helps machining and measurement refer to the same rotor axis.
No. Balance concerns mass distribution; runout concerns geometric relationship to the datum axis. The disk program can require both alongside material and surface acceptance.
A finishing scope can be reviewed when its material pedigree, incoming condition and machining allowance are established. The quote should identify the remaining operations, inspection and release records.
Send the disk drawing, material and forging specification, final condition and release requirements, with quantity and schedule.
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