VT machining offers CNC Turning for 630 Stainless Steel (UNS S17400 / 1.4542 (=17-4 PH)), typically supplied condition A or H900-H1150. AISI/ASTM designation of 17-4 PH; precipitation-hardened at low temperature with little distortion.
CNC Turning Notes for 630 Stainless Steel
On the lathe 630 Stainless Steel needs chip-breaker inserts and constant chip load to avoid long, stringy swarf.
For estimating, a 100 × 100 × 10 mm block of 630 Stainless Steel weighs about 0.78 kg.
Starting Parameters for CNC Turning 630 Stainless Steel
| Cutting speed (carbide) | 130-235 m/min |
|---|---|
| Feed | 0.08-0.25 mm/rev |
| Spindle speed, Ø25 mm bar | 1660-2990 rpm |
| Insert / tool class | ISO M — positive-rake PVD/CVD carbide |
| Coolant | Flood emulsion (8-10%) or high-pressure coolant |
Starting values for 630 Stainless Steel, Condition A or H900-H1150; optimised on the first article.
630 Stainless Steel Data Relevant to CNC Turning
| Equivalent designations | UNS S17400 / 1.4542 (=17-4 PH) |
|---|---|
| Key composition | Cr 15-17.5%, Ni 3-5%, Cu 3-5%, Nb |
| Typical supply condition | Condition A or H900-H1150 |
| Hardness (typical) | ~28-44 HRC by condition |
| Machinability rating | 48% (AISI B1112 = 100%) |
Typical values; we work to your drawing and mill certificate.
How 630 Stainless Steel Differs
AISI/ASTM designation of 17-4 PH; precipitation-hardened at low temperature with little distortion.
Typical applications: Aerospace fittings, pump shafts, valve parts.
630 Stainless Steel vs Similar Grades
| 630 Stainless Steel | 440C Stainless Steel | 17-4 PH Stainless Steel | 431 Stainless Steel | |
|---|---|---|---|---|
| Key composition | Cr 15-17.5%, Ni 3-5%, Cu 3-5%, Nb | Cr 16-18%, C 0.95-1.2% | Cr 15-17.5%, Ni 3-5%, Cu 3-5%, Nb | Cr 15-17%, Ni 1.25-2.5% |
| Hardness | ~28-44 HRC by condition | Up to ~58-60 HRC | ~28-44 HRC by condition | ~25-40 HRC |
| Tensile (MPa) | 930-1310 | ≥760 annealed | 930-1310 | ~860 (H&T) |
| Machinability % | 48 | 40 | 48 | 45 |
| Typical use | Aerospace fittings, pump shafts, valve parts | Bearings, valve seats, nozzles, knives | Aerospace, oil & gas, medical instruments | Pump shafts, marine fittings, aircraft fasteners |
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 630 Stainless Steel
Send a STEP/IGES model or PDF drawing, confirm 630 Stainless Steel and its condition (we usually see it supplied condition A or H900-H1150), the quantity, critical tolerances and any finish or certificate requirements.
630 Stainless Steel in Other Processes
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Send the drawing, the 630 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 Turning 630 Stainless Steel?
CNC Turning prototypes for 630 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.
What is CNC Turning 630 Stainless Steel and how is it done?
CNC Turning 630 Stainless Steel refers to cNC turning rotates the workpiece against a single-point tool to produce cylindrical features, threads and grooves. Applied to 630 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.
Does CNC Turning 630 Stainless Steel require dedicated tooling?
Most 630 Stainless Steel turning work uses standard cutting tools and CNC programs; dedicated fixtures are made only when geometry or volume requires them.
Why is 630 Stainless Steel a good choice for CNC Turning?
630 Stainless Steel is corrosion resistant, strong and hygienic, which makes it well suited to CNC Turning. We tune the process to the alloy so the finished 630 Stainless Steel turning part meets your dimensional and functional requirements.
What tolerances can you hold for CNC Turning 630 Stainless Steel?
Achievable tolerances for 630 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.