CNC Sinker EDM 309S Stainless Steel is part of VT machining's grade-specific capability. 309S Stainless Steel is corrosion resistant, strong and hygienic, and we combine controlled EDM machining with material-aware setup to produce parts that meet your specification.
CNC Sinker EDM Capability for 309S Stainless Steel
- Austenitic/martensitic grades
- Corrosion resistant
- Tolerance to ±0.01 mm
- Typical hardness 70–200 HB (annealed)
Machining 309S Stainless Steel with CNC Sinker EDM
When EDM machining 309S Stainless Steel, machinability is moderate; work-hardens, so positive-rake tooling and steady feeds are used to avoid glazing. Our process plan reflects this so the finished part holds its tolerances without distortion or poor finish.
Documented parameters for 309S Stainless Steel mean predictable cycle times and stable, repeatable results.
CNC Sinker EDM Tolerances & Surface Finish
EDM holds tolerances to roughly ±0.002–0.005 mm with no cutting force on the 309S Stainless Steel part, producing fine, controlled surface textures and sharp internal corners impossible to mill.
Exact achievable figures depend on the alloy, the feature size and the part geometry. Tell us which dimensions are critical and we will advise feasibility up front.
Why 309S Stainless Steel?
Customers select 309S Stainless Steel for CNC Sinker EDM because it is corrosion resistant, strong and hygienic. We handle grade verification and any required heat treatment or finishing.
Design Tips for CNC Sinker EDM 309S Stainless Steel
Small design adjustments often cut cost and lead time. EDM suits sharp internal corners, thin ribs and hardened 309S Stainless Steel that cannot be milled; allowing a small corner radius where possible speeds the cut. If you send your model early, we will return practical DFM feedback before you commit to production.
Secondary Operations & Finishing
Most 309S Stainless Steel parts need some finishing, which we manage in-house or through vetted partners. Options include deburring and edge-breaking, heat treatment, surface grinding, polishing, and plating or anodising for corrosion resistance and appearance. Give us the finished-part requirement and we will sequence every operation correctly.
CNC Sinker EDM Quality & Inspection
Quality is built in, not inspected on. We monitor key features during the run and confirm them at final inspection, with CMM verification available for tight tolerances. We provide the inspection and traceability records your quality system requires.
Applications of CNC Sinker EDM 309S Stainless Steel
309S Stainless Steel parts made this way are found throughout aerospace, medical, automotive, electronics and industrial equipment. Prototype, bridge and production volumes are all welcome.
How to Order CNC Sinker EDM 309S Stainless Steel
Starting your project takes one email. Send your CAD or 2D drawing, the 309S Stainless Steel grade and condition, the quantity and any finish or inspection requirements. We respond quickly with price, lead time and any DFM notes, in clear English.
309S Stainless Steel in Other Processes
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Need CNC Sinker EDM 309S Stainless Steel for your project? Send your drawing and quantity for a fast quotation.
Request a QuoteFrequently Asked Questions
Why is 309S Stainless Steel a good choice for CNC Sinker EDM?
309S Stainless Steel is corrosion resistant, strong and hygienic, which makes it well suited to CNC Sinker EDM. We tune the process to the alloy so the finished 309S Stainless Steel EDM machining part meets your dimensional and functional requirements.
Does CNC Sinker EDM 309S Stainless Steel require dedicated tooling?
Wire EDM needs no shaped tooling; sinker EDM uses a shaped electrode we produce in-house for your cavity.
What surface finish is achievable on 309S Stainless Steel with CNC Sinker EDM?
Surface finish on 309S Stainless Steel is controlled to your specification; we confirm the achievable Ra against your callout.
Which industries use CNC Sinker EDM 309S Stainless Steel parts?
CNC Sinker EDM 309S Stainless Steel parts are used across aerospace, medical, automotive, electronics, semiconductor and general industrial sectors — anywhere precise 309S Stainless Steel components are required.