VT machining offers CNC Surface Grinding for 420 Stainless Steel (UNS S42000 / 1.4021-1.4034), typically supplied annealed or hardened. Higher carbon than 410 reaches greater hardness; machined annealed then hardened.
CNC Surface Grinding Notes for 420 Stainless Steel
420 Stainless Steel is ground with aluminium-oxide or CBN wheels chosen for its hardness (Up to ~50 HRC).
Process Data for CNC Surface Grinding 420 Stainless Steel
| Wheel (supply condition) | Aluminium oxide (white/ceramic), soft grade |
|---|---|
| Wheel (hardened to ~50 HRC) | CBN or ceramic aluminium oxide |
| Depth per pass (rough / finish) | 0.005-0.015 / 0.002-0.005 mm |
| Achievable finish | Ra 0.1-0.2 µm |
| Typical size tolerance | Flatness 0.002-0.005 mm, thickness ±0.002 mm |
| Thermal growth, 200 mm part, +2 °C | 4.1 µm (CTE 10.3 µm/m·K) |
Typical values for 420 Stainless Steel, Annealed or hardened; confirmed on the first part.
420 Stainless Steel Data Relevant to CNC Surface Grinding
| Equivalent designations | UNS S42000 / 1.4021-1.4034 |
|---|---|
| Typical supply condition | Annealed or hardened |
| Hardness (typical) | Up to ~50 HRC |
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 420 Stainless Steel
Send a STEP/IGES model or PDF drawing, confirm 420 Stainless Steel and its condition (we usually see it supplied annealed or hardened), the quantity, critical tolerances and any finish or certificate requirements.
420 Stainless Steel in Other Processes
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Send the drawing, the 420 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 420 Stainless Steel a good choice for CNC Surface Grinding?
420 Stainless Steel is corrosion resistant, strong and hygienic, which makes it well suited to CNC Surface Grinding. We tune the process to the alloy so the finished 420 Stainless Steel grinding part meets your dimensional and functional requirements.
What tolerances can you hold for CNC Surface Grinding 420 Stainless Steel?
Achievable tolerances for 420 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.
What is CNC Surface Grinding 420 Stainless Steel and how is it done?
CNC Surface Grinding 420 Stainless Steel refers to surface grinding produces flat, parallel faces with fine finish using a horizontal abrasive wheel. Applied to 420 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 material thickness or size range suits CNC Surface Grinding 420 Stainless Steel?
We machine 420 Stainless Steel across a broad size range; share your part envelope for confirmation.
What surface finish is achievable on 420 Stainless Steel with CNC Surface Grinding?
Grinding can take 420 Stainless Steel to a fine finish — typically Ra 0.1–0.4 µm, and to a mirror grade on suitable alloys.
What is the typical lead time and minimum order for CNC Surface Grinding 420 Stainless Steel?
CNC Surface Grinding prototypes for 420 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.