VT machining offers CNC Surface Grinding for 309S Stainless Steel (UNS S30908 / 1.4833), typically supplied annealed. Low-carbon 309 for better weldability in high-temperature fabrications.
CNC Surface Grinding Notes for 309S Stainless Steel
309S Stainless Steel is ground with aluminium-oxide or CBN wheels chosen for its hardness (≤95 HRB).
Process Data for CNC Surface Grinding 309S Stainless Steel
| Wheel (supply condition) | Aluminium oxide (white/ceramic), soft grade |
|---|---|
| Depth per pass (rough / finish) | 0.01-0.03 / 0.002-0.005 mm |
| Achievable finish | Ra 0.2-0.4 µm |
| Typical size tolerance | Flatness 0.002-0.005 mm, thickness ±0.002 mm |
| Thermal growth, 200 mm part, +2 °C | 6.6 µm (CTE 16.5 µm/m·K) |
Typical values for 309S Stainless Steel, Annealed; confirmed on the first part.
309S Stainless Steel Data Relevant to CNC Surface Grinding
| Equivalent designations | UNS S30908 / 1.4833 |
|---|---|
| Typical supply condition | Annealed |
| Hardness (typical) | ≤95 HRB |
Typical values; we work to your drawing and mill certificate.
More on CNC Surface Grinding Stainless Steel
Finishing options, quality documentation and general cnc surface grinding guidance for all stainless steel grades are on our CNC Surface Grinding Stainless Steel page.
No drawing yet? Sketch the part in our free 3D + 2D builder and send it with your RFQ.
Quoting CNC Surface Grinding 309S Stainless Steel
Send a STEP/IGES model or PDF drawing, confirm 309S Stainless Steel and its condition (we usually see it supplied annealed), the quantity, critical tolerances and any finish or certificate requirements.
309S Stainless Steel in Other Processes
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Send the drawing, the 309S 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 Surface Grinding 309S Stainless Steel?
CNC Surface Grinding prototypes for 309S 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 tolerances can you hold for CNC Surface Grinding 309S Stainless Steel?
Achievable tolerances for 309S Stainless Steel grinding depend on the alloy, geometry and feature size. Grinding routinely holds single-micron tolerances on diameter, flatness and parallelism. Exact figures are confirmed against your drawing callouts.
How clean are the edges produced by CNC Surface Grinding on 309S Stainless Steel?
Machined 309S Stainless Steel edges are clean and to specification; edge-break or deburring is added when your drawing calls for it.
What surface finish is achievable on 309S Stainless Steel with CNC Surface Grinding?
Grinding can take 309S Stainless Steel to a fine finish — typically Ra 0.1–0.4 µm, and to a mirror grade on suitable alloys.
Can VT machining make custom 309S Stainless Steel parts to my drawing?
Yes. 309S Stainless Steel grinding 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.