VT machining offers CNC Turning for 302 Stainless Steel (UNS S30200 / 1.4319), typically supplied annealed or spring temper. Higher carbon than 304 gives more strength after cold work; common spring-wire grade.
CNC Turning Notes for 302 Stainless Steel
On the lathe 302 Stainless Steel needs chip-breaker inserts and constant chip load to avoid long, stringy swarf.
For estimating, a 100 × 100 × 10 mm block of 302 Stainless Steel weighs about 0.79 kg.
Starting Parameters for CNC Turning 302 Stainless Steel
| Cutting speed (carbide) | 105-195 m/min |
|---|---|
| Feed | 0.08-0.25 mm/rev |
| Spindle speed, Ø25 mm bar | 1340-2480 rpm |
| Insert / tool class | ISO M — positive-rake PVD/CVD carbide |
| Coolant | Flood emulsion (8-10%) or high-pressure coolant |
Starting values for 302 Stainless Steel, Annealed or spring temper; optimised on the first article.
302 Stainless Steel Data Relevant to CNC Turning
| Equivalent designations | UNS S30200 / 1.4319 |
|---|---|
| Key composition | Cr 17-19%, Ni 8-10%, C ≤0.15% |
| Typical supply condition | Annealed or spring temper |
| Hardness (typical) | ≤90 HRB annealed |
| Machinability rating | 40% (AISI B1112 = 100%) |
Typical values; we work to your drawing and mill certificate.
How 302 Stainless Steel Differs
Higher carbon than 304 gives more strength after cold work; common spring-wire grade.
Typical applications: Spring wire, fasteners, washers.
302 Stainless Steel vs Similar Grades
| 302 Stainless Steel | T301 Stainless Steel | 303 Stainless Steel | 301 Stainless Steel | |
|---|---|---|---|---|
| Key composition | Cr 17-19%, Ni 8-10%, C ≤0.15% | Cr 16-18%, Ni 6-8% | Cr 17-19%, Ni 8-10%, S ≥0.15% | Cr 16-18%, Ni 6-8% |
| Hardness | ≤90 HRB annealed | ~40-50 HRC by temper | ≤95 HRB | Up to ~45 HRC (full hard) |
| Tensile (MPa) | ≥515 | 930-1800 | ≥515 | 515-1300 by temper |
| Machinability % | 40 | 35 | 78 | 40 |
| Typical use | Spring wire, fasteners, washers | Precision springs, shims, etched flat parts | Screw-machine parts, shafts, fittings, bushings | Springs, clips, stamped brackets, conveyor belts |
More on CNC Turning Stainless Steel
Finishing options, quality documentation and general cnc turning guidance for all stainless steel grades are on our CNC Turning Stainless Steel page.
No drawing yet? Sketch the part in our free 3D + 2D builder and send it with your RFQ.
Quoting CNC Turning 302 Stainless Steel
Send a STEP/IGES model or PDF drawing, confirm 302 Stainless Steel and its condition (we usually see it supplied annealed or spring temper), the quantity, critical tolerances and any finish or certificate requirements.
302 Stainless Steel in Other Processes
Related
Send the drawing, the 302 Stainless Steel condition and the quantity — pricing and lead time come back the same or next business day.
Request a QuoteFrequently Asked Questions
What material thickness or size range suits CNC Turning 302 Stainless Steel?
Turned 302 Stainless Steel parts are produced from bar or chuck stock across a wide diameter range.
What is CNC Turning 302 Stainless Steel and how is it done?
CNC Turning 302 Stainless Steel refers to cNC turning rotates the workpiece against a single-point tool to produce cylindrical features, threads and grooves. Applied to 302 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.
What surface finish is achievable on 302 Stainless Steel with CNC Turning?
Surface finish on 302 Stainless Steel is controlled to your specification; we confirm the achievable Ra against your callout.
Does CNC Turning 302 Stainless Steel require dedicated tooling?
Most 302 Stainless Steel turning work uses standard cutting tools and CNC programs; dedicated fixtures are made only when geometry or volume requires them.