CNC Sinker EDM 309 Stainless Steel

VT machining provides CNC Sinker EDM 309 Stainless Steel for customers who need accurate, repeatable 309 Stainless Steel components. The machinability of 309 Stainless Steel is moderate; work-hardens, so positive-rake tooling and steady feeds are used to avoid glazing, so we set the operation up specifically for this grade.

CNC Sinker EDM Capability for 309 Stainless Steel

• Austenitic/martensitic grades
• Corrosion resistant
• Tolerance to ±0.01 mm
• Typical hardness 70–200 HB (annealed)

Machining 309 Stainless Steel with CNC Sinker EDM

309 Stainless Steel behaves predictably under CNC Sinker EDM once parameters are dialled in: machinability is moderate; work-hardens, so positive-rake tooling and steady feeds are used to avoid glazing, and we tune the operation accordingly.

We hold reference parameters for this grade, so repeat orders of 309 Stainless Steel run consistently from one batch to the next.

Design Tips for CNC Sinker EDM 309 Stainless Steel

We are happy to suggest design tweaks that improve manufacturability. EDM suits sharp internal corners, thin ribs and hardened 309 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

Finished 309 Stainless Steel parts can move straight into secondary operations under one roof. Typical add-ons are deburring, passivation, anodising, plating, blasting, polishing and laser marking. We coordinate the whole chain so you receive complete, inspection-ready parts.

CNC Sinker EDM Quality & Inspection

We control quality throughout the process, not just at the end. In-process checks plus final inspection — including CMM where specified — keep every 309 Stainless Steel part to print. Inspection reports, material certificates and first-article documentation can be supplied on request.

Why 309 Stainless Steel?

309 Stainless Steel is chosen when a part needs what this grade offers — it is corrosion resistant, strong and hygienic. We confirm the grade and any temper or heat-treat condition with you before machining.

CNC Sinker EDM Tolerances & Surface Finish

EDM holds tolerances to roughly ±0.002–0.005 mm with no cutting force on the 309 Stainless Steel part, producing fine, controlled surface textures and sharp internal corners impossible to mill.

Final tolerances are governed by the material's behaviour, wall thickness and overall stiffness. We give honest DFM feedback if a callout would be costly or better achieved another way.

Applications of CNC Sinker EDM 309 Stainless Steel

Customers order CNC Sinker EDM 309 Stainless Steel components for everything from instrumentation to structural and functional assemblies. Whether you need a single prototype or recurring production volume, the same process discipline applies.

How to Order CNC Sinker EDM 309 Stainless Steel

Getting a quote is simple. Share your model, the material grade, your quantity and target tolerances. You receive a clear quotation with lead time and honest manufacturability feedback.

309 Stainless Steel in Other Processes

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