VT machining offers CNC Sinker EDM for 440C Stainless Steel (UNS S44004 / 1.4125 / SUS440C), typically supplied annealed or hardened. Highest hardness/wear resistance of stainless; hardened parts are finish-ground.
CNC Sinker EDM Notes for 440C Stainless Steel
Cavities and blind forms in 440C Stainless Steel are sunk with graphite or copper electrodes, directly in the hardened state.
Process Data for CNC Sinker EDM 440C Stainless Steel
| Electrode | Graphite (roughing) / copper (fine finish) |
|---|---|
| Relative removal rate | Medium (vs tool steel = medium) |
| Best finish | VDI 12-18 (Ra 0.4-0.8 µm) |
Typical values for 440C Stainless Steel, Annealed or hardened; confirmed on the first part.
Full material data for 440C Stainless Steel (UNS S44004 / 1.4125 / SUS440C) is on the CNC Wire EDM 440C Stainless Steel page.
More on CNC Sinker EDM Stainless Steel
Finishing options, quality documentation and general cnc sinker edm guidance for all stainless steel grades are on our CNC Sinker EDM Stainless Steel page.
No drawing yet? Sketch the part in our free 3D + 2D builder and send it with your RFQ.
Quoting CNC Sinker EDM 440C Stainless Steel
Send a STEP/IGES model or PDF drawing, confirm 440C Stainless Steel and its condition (we usually see it supplied annealed or hardened), the quantity, critical tolerances and any finish or certificate requirements.
440C Stainless Steel in Other Processes
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Send the drawing, the 440C Stainless Steel condition and the quantity — pricing and lead time come back the same or next business day.
Request a QuoteFrequently Asked Questions
What is the typical lead time and minimum order for CNC Sinker EDM 440C Stainless Steel?
CNC Sinker EDM prototypes for 440C Stainless Steel can be produced quickly and scaled to series production. Send your drawing and quantity and we will advise lead time and any minimum order.
Why is 440C Stainless Steel a good choice for CNC Sinker EDM?
440C 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 440C Stainless Steel EDM machining part meets your dimensional and functional requirements.
What tolerances can you hold for CNC Sinker EDM 440C Stainless Steel?
Achievable tolerances for 440C Stainless Steel EDM machining depend on the alloy, geometry and feature size. EDM holds tolerances to around ±0.002 mm with no cutting force on the part. Exact figures are confirmed against your drawing callouts.
Can you EDM-machine hardened 440C Stainless Steel?
Yes. EDM removes material by electrical discharge rather than cutting force, so hardened and difficult 440C Stainless Steel can be machined to fine detail and tight tolerance without distortion.