VT machining offers CNC Plasma Cutting 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 Plasma Cutting Notes for 420 Stainless Steel
Plasma is a fast, economical option for thicker 420 Stainless Steel plate where edge finish is less critical.
For estimating, a 100 × 100 × 10 mm block of 420 Stainless Steel weighs about 0.77 kg.
Process Data for CNC Plasma Cutting 420 Stainless Steel
| Max practical thickness | ~40 mm (high-definition plasma) |
|---|---|
| Edge tolerance | ±0.3-0.5 mm, 1-3° bevel |
| Heat-affected zone | ~0.5-1.5 mm (allow machining stock if critical) |
| Plasma gas | Nitrogen or argon-hydrogen |
Typical values for 420 Stainless Steel, Annealed or hardened; confirmed on the first part.
Full material data for 420 Stainless Steel (UNS S42000 / 1.4021-1.4034) is on the CNC Laser Cutting 420 Stainless Steel page.
More on CNC Plasma Cutting Stainless Steel
Finishing options, quality documentation and general cnc plasma cutting guidance for all stainless steel grades are on our CNC Plasma Cutting Stainless Steel page.
No drawing yet? Sketch the part in our free 3D + 2D builder and send it with your RFQ.
Quoting CNC Plasma Cutting 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
What is CNC Plasma Cutting 420 Stainless Steel and how is it done?
CNC Plasma Cutting 420 Stainless Steel refers to cNC plasma cutting uses an ionized gas jet to sever thicker conductive plate at high speed. 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.
Why is 420 Stainless Steel a good choice for CNC Plasma Cutting?
420 Stainless Steel is corrosion resistant, strong and hygienic, which makes it well suited to CNC Plasma Cutting. We tune the process to the alloy so the finished 420 Stainless Steel cutting part meets your dimensional and functional requirements.
Does CNC Plasma Cutting 420 Stainless Steel require dedicated tooling?
Most 420 Stainless Steel cutting work uses standard cutting tools and CNC programs; dedicated fixtures are made only when geometry or volume requires them.
What tolerances can you hold for CNC Plasma Cutting 420 Stainless Steel?
Achievable tolerances for 420 Stainless Steel cutting depend on the alloy, geometry and feature size. Laser cutting holds contour tolerances to around ±0.05 mm depending on thickness. Exact figures are confirmed against your drawing callouts.
How clean are the edges produced by CNC Plasma Cutting on 420 Stainless Steel?
Laser cutting leaves 420 Stainless Steel with a narrow kerf and a clean, near burr-free edge and only a small heat-affected zone.
What surface finish is achievable on 420 Stainless Steel with CNC Plasma Cutting?
Laser cutting leaves a clean cut face on 420 Stainless Steel with a small heat-affected zone; most parts need little secondary finishing.