VT machining offers CNC Precision Machining for 309S Stainless Steel (UNS S30908 / 1.4833), typically supplied annealed. Low-carbon 309 for better weldability in high-temperature fabrications.
CNC Precision Machining Notes for 309S Stainless Steel
309S Stainless Steel mills well with conventional strategies; finishing passes are planned to meet flatness and finish callouts.
For estimating, a 100 × 100 × 10 mm block of 309S Stainless Steel weighs about 0.79 kg.
Starting Parameters for CNC Precision Machining 309S Stainless Steel
| Cutting speed (carbide) | 75-135 m/min |
|---|---|
| Feed per tooth | 0.028-0.088 mm |
| Spindle speed, Ø6 mm end mill | 3980-7160 rpm |
| Insert / tool class | ISO M — positive-rake PVD/CVD carbide |
| Coolant | Flood emulsion (8-10%) or high-pressure coolant |
| Thermal growth, 100 mm part, +5 °C | 8.3 µm (CTE 16.5 µm/m·K) |
| Tightest practical tolerance | ±0.002-0.005 mm |
Starting values for 309S Stainless Steel, Annealed; optimised on the first article.
Full material data for 309S Stainless Steel (UNS S30908 / 1.4833) is on the CNC Milling 309S Stainless Steel page.
More on CNC Precision Machining Stainless Steel
Finishing options, quality documentation and general cnc precision machining guidance for all stainless steel grades are on our CNC Precision Machining Stainless Steel page.
No drawing yet? Sketch the part in our free 3D + 2D builder and send it with your RFQ.
Quoting CNC Precision Machining 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 surface finish is achievable on 309S Stainless Steel with CNC Precision Machining?
Surface finish on 309S Stainless Steel is controlled to your specification; we confirm the achievable Ra against your callout.
What is CNC Precision Machining 309S Stainless Steel and how is it done?
CNC Precision Machining 309S Stainless Steel refers to precision machining combines processes and inspection to hold the tightest dimensional and geometric tolerances. Applied to 309S Stainless Steel — corrosion resistant, strong and hygienic — VT machining produces each part to your CAD drawing, selecting parameters from your tolerance, finish and quantity requirements.
Does CNC Precision Machining 309S Stainless Steel require dedicated tooling?
Most 309S Stainless Steel machining work uses standard cutting tools and CNC programs; dedicated fixtures are made only when geometry or volume requires them.
Why is 309S Stainless Steel a good choice for CNC Precision Machining?
309S Stainless Steel is corrosion resistant, strong and hygienic, which makes it well suited to CNC Precision Machining. We tune the process to the alloy so the finished 309S Stainless Steel machining part meets your dimensional and functional requirements.
How clean are the edges produced by CNC Precision Machining 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.