VT machining offers CNC Boring for 431 Stainless Steel (UNS S43100 / 1.4057), typically supplied hardened & tempered. Best corrosion resistance of the martensitic grades with high toughness.
CNC Boring Notes for 431 Stainless Steel
Boring bars for 431 Stainless Steel are chosen for rigidity, with sharp inserts and light finishing passes to avoid chatter and smearing.
For estimating, a 100 × 100 × 10 mm block of 431 Stainless Steel weighs about 0.77 kg.
Starting Parameters for CNC Boring 431 Stainless Steel
| Cutting speed (carbide) | 80-150 m/min |
|---|---|
| Feed | 0.056-0.175 mm/rev |
| Spindle speed, Ø30 mm bore | 850-1590 rpm |
| Insert / tool class | ISO H — CBN or fine-grain carbide |
| Coolant | Flood emulsion (8-10%) or high-pressure coolant |
Starting values for 431 Stainless Steel, Hardened & tempered; optimised on the first article.
Full material data for 431 Stainless Steel (UNS S43100 / 1.4057) is on the CNC Turning 431 Stainless Steel page.
More on CNC Boring Stainless Steel
Finishing options, quality documentation and general cnc boring guidance for all stainless steel grades are on our CNC Boring Stainless Steel page.
No drawing yet? Sketch the part in our free 3D + 2D builder and send it with your RFQ.
Quoting CNC Boring 431 Stainless Steel
Send a STEP/IGES model or PDF drawing, confirm 431 Stainless Steel and its condition (we usually see it supplied hardened & tempered), the quantity, critical tolerances and any finish or certificate requirements.
431 Stainless Steel in Other Processes
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Send the drawing, the 431 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 the typical lead time and minimum order for CNC Boring 431 Stainless Steel?
CNC Boring prototypes for 431 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.
Why is 431 Stainless Steel a good choice for CNC Boring?
431 Stainless Steel is corrosion resistant, strong and hygienic, which makes it well suited to CNC Boring. We tune the process to the alloy so the finished 431 Stainless Steel turning part meets your dimensional and functional requirements.
What is CNC Boring 431 Stainless Steel and how is it done?
CNC Boring 431 Stainless Steel refers to boring enlarges and finishes existing holes to precise diameter, roundness and surface finish. Applied to 431 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 tolerances can you hold for CNC Boring 431 Stainless Steel?
Achievable tolerances for 431 Stainless Steel turning depend on the alloy, geometry and feature size. Turning holds diameter tolerances to around ±0.005 mm with concentricity within 0.01 mm. Exact figures are confirmed against your drawing callouts.
What surface finish is achievable on 431 Stainless Steel with CNC Boring?
Surface finish on 431 Stainless Steel is controlled to your specification; we confirm the achievable Ra against your callout.