VT machining offers CNC Polishing for 303 Stainless Steel (UNS S30300 / 1.4305 / SUS303), typically supplied annealed. Sulfur addition makes it the most machinable austenitic grade, at the cost of weldability and some corrosion resistance.
CNC Polishing Notes for 303 Stainless Steel
303 Stainless Steel polishes to a bright finish; the final grit is chosen to meet the cosmetic standard.
Process Data for CNC Polishing 303 Stainless Steel
| Best achievable finish | Ra 0.03-0.05 µm |
|---|---|
| Final abrasive | Fine alumina or polishing compound |
Typical values for 303 Stainless Steel, Annealed; confirmed on the first part.
303 Stainless Steel Data Relevant to CNC Polishing
| Equivalent designations | UNS S30300 / 1.4305 / SUS303 |
|---|---|
| Typical supply condition | Annealed |
| Hardness (typical) | ≤95 HRB |
Typical values; we work to your drawing and mill certificate.
More on CNC Polishing Stainless Steel
Finishing options, quality documentation and general cnc polishing guidance for all stainless steel grades are on our CNC Polishing Stainless Steel page.
No drawing yet? Sketch the part in our free 3D + 2D builder and send it with your RFQ.
Quoting CNC Polishing 303 Stainless Steel
Send a STEP/IGES model or PDF drawing, confirm 303 Stainless Steel and its condition (we usually see it supplied annealed), the quantity, critical tolerances and any finish or certificate requirements.
303 Stainless Steel in Other Processes
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Send the drawing, the 303 Stainless Steel condition and the quantity — pricing and lead time come back the same or next business day.
Request a QuoteFrequently Asked Questions
Can VT machining make custom 303 Stainless Steel parts to my drawing?
Yes. 303 Stainless Steel finishing is made to order from your CAD/2D drawing. Share your geometry, material grade, tolerance and quantity and we will confirm feasibility, lead time and pricing.
Does CNC Polishing 303 Stainless Steel require dedicated tooling?
Most 303 Stainless Steel finishing work uses standard cutting tools and CNC programs; dedicated fixtures are made only when geometry or volume requires them.
What tolerances can you hold for CNC Polishing 303 Stainless Steel?
Achievable tolerances for 303 Stainless Steel finishing depend on the alloy, geometry and feature size. We hold tight, repeatable tolerances appropriate to the feature and material. Exact figures are confirmed against your drawing callouts.
What is the typical lead time and minimum order for CNC Polishing 303 Stainless Steel?
CNC Polishing prototypes for 303 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.
What surface finish is achievable on 303 Stainless Steel with CNC Polishing?
Our finishing processes refine 303 Stainless Steel surfaces to Ra values as low as 0.05 µm for cosmetic or sealing faces.
Why is 303 Stainless Steel a good choice for CNC Polishing?
303 Stainless Steel is corrosion resistant, strong and hygienic, which makes it well suited to CNC Polishing. We tune the process to the alloy so the finished 303 Stainless Steel finishing part meets your dimensional and functional requirements.