VT machining offers CNC Milling for 430 Stainless Steel (UNS S43000 / 1.4016 / SUS430), typically supplied annealed. Ferritic, nickel-free and magnetic; cheaper than 304 with fair corrosion resistance.
CNC Milling Notes for 430 Stainless Steel
430 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 430 Stainless Steel weighs about 0.77 kg.
Starting Parameters for CNC Milling 430 Stainless Steel
| Cutting speed (carbide) | 120-225 m/min |
|---|---|
| Feed per tooth | 0.028-0.088 mm |
| Spindle speed, Ø10 mm end mill | 3820-7160 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, +10 °C | 10.4 µm (CTE 10.4 µm/m·K) |
Starting values for 430 Stainless Steel, Annealed; optimised on the first article.
430 Stainless Steel Data Relevant to CNC Milling
| Equivalent designations | UNS S43000 / 1.4016 / SUS430 |
|---|---|
| Key composition | Cr 16-18% |
| Typical supply condition | Annealed |
| Hardness (typical) | ≤88 HRB |
| Machinability rating | 54% (AISI B1112 = 100%) |
Typical values; we work to your drawing and mill certificate.
How 430 Stainless Steel Differs
Ferritic, nickel-free and magnetic; cheaper than 304 with fair corrosion resistance.
Typical applications: Appliance panels, trim, magnetic parts.
430 Stainless Steel vs Similar Grades
| 430 Stainless Steel | 420 Stainless Steel | 431 Stainless Steel | 416 Stainless Steel | |
|---|---|---|---|---|
| Key composition | Cr 16-18% | Cr 12-14%, C 0.15-0.4% | Cr 15-17%, Ni 1.25-2.5% | Cr 12-14%, S ≥0.15% |
| Hardness | ≤88 HRB | Up to ~50 HRC | ~25-40 HRC | ~20 HRC annealed; up to ~40 HRC |
| Tensile (MPa) | ≥450 | ≥655 annealed | ~860 (H&T) | ≥485 annealed |
| Machinability % | 54 | 45 | 45 | 85 |
| Typical use | Appliance panels, trim, magnetic parts | Surgical instruments, molds, knife blades | Pump shafts, marine fittings, aircraft fasteners | Screw-machine parts, valve stems, gears, motor shafts |
More on CNC Milling Stainless Steel
Finishing options, quality documentation and general cnc milling guidance for all stainless steel grades are on our CNC Milling Stainless Steel page.
No drawing yet? Sketch the part in our free 3D + 2D builder and send it with your RFQ.
Quoting CNC Milling 430 Stainless Steel
Send a STEP/IGES model or PDF drawing, confirm 430 Stainless Steel and its condition (we usually see it supplied annealed), the quantity, critical tolerances and any finish or certificate requirements.
430 Stainless Steel in Other Processes
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Send the drawing, the 430 Stainless Steel condition and the quantity — pricing and lead time come back the same or next business day.
Request a QuoteFrequently Asked Questions
Why is 430 Stainless Steel a good choice for CNC Milling?
430 Stainless Steel is corrosion resistant, strong and hygienic, which makes it well suited to CNC Milling. We tune the process to the alloy so the finished 430 Stainless Steel machining part meets your dimensional and functional requirements.
Does CNC Milling 430 Stainless Steel require dedicated tooling?
Most 430 Stainless Steel machining work uses standard cutting tools and CNC programs; dedicated fixtures are made only when geometry or volume requires them.
What surface finish is achievable on 430 Stainless Steel with CNC Milling?
Surface finish on 430 Stainless Steel is controlled to your specification; we confirm the achievable Ra against your callout.
What tolerances can you hold for CNC Milling 430 Stainless Steel?
Achievable tolerances for 430 Stainless Steel machining depend on the alloy, geometry and feature size. Milling holds positional and dimensional tolerances to around ±0.01 mm, tighter with precision setups. Exact figures are confirmed against your drawing callouts.