CNC Punching Inconel from VT machining delivers precision Inconel parts produced to your exact drawing. CNC turret punching shears holes and form features in sheet metal using programmable tooling for fast, repeatable patterns, and we tune every parameter to the behaviour of Inconel, which is high-temperature strength and oxidation resistance.
Process Data for CNC Punching Inconel
| Die clearance per side | 11% of thickness (0.22 mm at 2 mm) |
|---|---|
| Punch force, Ø10 hole in 2 mm | ~66.4 kN (6.8 t) |
| Minimum hole diameter | ≥ 1.5 × thickness |
Shown for Inconel 718, the most common Inconel grade we see for CNC Punching. Typical values for Inconel 718, Solution-treated or aged; confirmed on the first part.
CNC Punching Capability for Inconel
- Sheet thickness 0.5–6 mm
- Hole position repeatability ±0.10 mm
- Punch/die clearance set per material
- Louver, emboss and tap-extrude tooling
Inconel Material Data
| Density | 8.19 g/cm³ |
|---|---|
| Tensile strength | 1375 MPa |
| Yield strength (0.2%) | 1100 MPa |
| Hardness | 36–44 HRC |
| Melting point | 1260–1336 °C |
| Thermal conductivity | 11.4 W/m·K |
| Thermal expansion | 13.0 ×10⁻⁶/K |
| Electrical conductivity | 1.4% |
| Machinability (C36000 = 100%) | 12–15% |
| Grades we run | 600, 625, 718, X-750, 725 |
Published typical values for Inconel 718 (aged). Other grades in the family differ — the certificate supplied with your order carries the actual heat-lot figures.
Tool life is measured in minutes, not hours. Ceramic or coated-carbide tooling, low surface speed, high pressure coolant, and a scheduled tool change rather than waiting for failure.
How CNC Punching Inconel Works
A CNC turret presses hardened punches through the Inconel sheet into matching dies. Punch-to-die clearance is set as a percentage of thickness so the cut edge stays clean and burr is minimal.
Programming is driven directly by your 3D model or print. Work-holding, tool selection and the cutting strategy are planned around the critical features and the material before the first chip is cut. First-off inspection confirms the process is centred before production continues.
Achievable Tolerances for CNC Punching Inconel
| Feature | Standard | Precision |
|---|---|---|
| Hole position across sheet | ±0.15 mm | ±0.10 mm |
| Hole diameter | ±0.10 mm | ±0.05 mm |
| Overall blank size | ±0.20 mm | ±0.10 mm |
| Minimum hole | 1.0 × thickness | 0.8 × thickness |
| Hole-to-edge distance | 2.0 × thickness | 1.5 × thickness |
| Burr height | 0.08 mm | 0.03 mm (deburred) |
| Sheet thickness range | 0.5–6.0 mm | 0.5–3.0 mm |
Standard is what a normal quotation assumes. Precision is available on nominated features and is priced separately, because it needs extra setups, in-process gauging and CMM verification. Call out only the features that need it — blanket-tightening a drawing is the single most common reason a quote comes back expensive.
Working with Inconel
As a material, Inconel is high-temperature strength and oxidation resistance. Our setup reflects the alloy's machinability so the finished part is accurate and free of avoidable defects.
We verify the exact grade and condition before machining, and traceable mill certs are available on request. We can work to your nominated material source or specification when required.
CNC Punching Tolerances & Surface Finish
Punched Inconel holds hole-position repeatability around ±0.10 mm across the sheet, with consistent hole quality when punch/die clearance is matched to the gauge.
Exact achievable figures depend on the alloy, the feature size and the part geometry. Tell us which dimensions are critical and we will advise feasibility up front.
Design Tips for CNC Punching Inconel
We are happy to suggest design tweaks that improve manufacturability. Keeping hole-to-edge and hole-to-hole distances at least 1.5–2× thickness avoids distortion and tearing in punched Inconel. If you send your model early, we will return practical DFM feedback before you commit to production.
Applications of CNC Punching Inconel
Customers order CNC Punching Inconel components for everything from instrumentation to structural and functional assemblies. Whether you need a single prototype or recurring production volume, the same process discipline applies.
Typical Inconel Parts for CNC Punching
Illustrative examples of CNC Punching Inconel parts and the callouts that usually drive the process plan. They show the kind of work that fits this process; they are not specific customer orders.
Electrical enclosure back plate
- Material
- Inconel
- Size
- 500 × 400 × 2 mm
- Key callouts
- Hole pattern ±0.10 mm, tap extrusions M4
- Batch
- 1,200 pcs
Tap extrusions formed in the turret so no separate tapping operation is needed.
Contact blank
- Material
- Inconel
- Size
- 18 × 9 × 0.3 mm
- Key callouts
- Contour ±0.05 mm, burr-free on the contact face
- Batch
- 50,000 pcs
Punched with the burr deliberately on the non-contact side.
Cable tray section
- Material
- Inconel
- Size
- 1,000 × 150 × 1.5 mm
- Key callouts
- Slot pattern ±0.15 mm
- Batch
- 600 pcs
Nested two-up along the sheet; scrap drops below 12%.
Finishing Options for Inconel
| Finish | Thickness / effect | Why it gets specified |
|---|---|---|
| Deburr / edge break | 0.05–0.3 mm | All parts unless the drawing says otherwise |
| Bead blast | Ra 1.6–3.2 µm | Uniform matt finish, hides tool marks |
| Laser marking | — | Part number, lot code, data matrix |
No drawing yet? Build one in the browser.
Set the metal, dimensions and features, watch the 3D model update as you type, then switch to the 2D sheet to add dimensions and tolerances. Download it or send it straight to us with your RFQ.
What We Need to Quote CNC Punching Inconel
- GeometrySTEP or IGES for the 3D model, plus a PDF drawing if you have tolerance callouts. A dimensioned sketch is enough to start.
- MaterialThe exact Inconel grade and condition — temper, heat-treat state or hardness. If you are not sure, tell us the function and we will suggest one.
- QuantityPrototype count and the expected annual volume. Both change how the part is made and therefore what it costs.
- TolerancesWhich features are critical. Everything else runs to our standard tolerance, which is what keeps the price sensible.
- FinishSurface treatment, cosmetic requirements, and any faces that must be masked.
- DocumentsWhether you need a material certificate, dimensional report, FAIR or PPAP with the shipment.
Missing something from the list is not a problem — send what you have. We will come back with the specific questions rather than a generic form.
Other Metals for CNC Punching
Other Processes for Inconel
Send the drawing, the Inconel grade and the quantity. You get pricing, lead time and any DFM notes back — usually within one business day.
Request a QuoteFrequently Asked Questions
What is the typical lead time and minimum order for CNC Punching Inconel?
CNC Punching prototypes for Inconel 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 Punching Inconel and how is it done?
CNC Punching Inconel refers to cNC turret punching shears holes and form features in sheet metal using programmable tooling for fast, repeatable patterns. Applied to Inconel — high-temperature strength and oxidation resistance — VT machining produces each part to your CAD drawing, selecting parameters from your tolerance, finish and quantity requirements.
Why is Inconel a good choice for CNC Punching?
Inconel is high-temperature strength and oxidation resistance, which makes it well suited to CNC Punching. We tune the process to the alloy so the finished Inconel punching part meets your dimensional and functional requirements.
How clean are the edges produced by CNC Punching on Inconel?
Punched Inconel edges are clean when punch/die clearance is correct; we set clearance to the gauge and can add deburring if specified.
Does CNC Punching Inconel require dedicated tooling?
Punching uses programmable turret tooling; standard tools cover most patterns, with special tools added for unique forms.