CNC Cylindrical Grinding D3 Tool Steel is part of VT machining's grade-specific capability. D3 Tool Steel is wear-resistant and hardenable for tooling, and we combine controlled grinding with material-aware setup to produce parts that meet your specification.
CNC Cylindrical Grinding Capability for D3 Tool Steel
- Air/oil/water-hardening grades
- High wear resistance
- Hardenable to 58–64 HRC
- Tolerance to ±0.005 mm
D3 Tool Steel Material Data
| Density | 14.5 g/cm³ |
|---|---|
| Tensile strength | 2000–3500 (TRS) MPa |
| Yield strength (0.2%) | — |
| Hardness | 88–93 HRA / 1300–1800 HV |
| Melting point | 2870 (WC) °C |
| Thermal conductivity | 70–100 W/m·K |
| Thermal expansion | 5.0 ×10⁻⁶/K |
| Electrical conductivity | 10% |
| Machinability (C36000 = 100%) | grind / EDM only |
| Grades we run | YG6, YG8, YG15 (K10–K30), D2, H13, M2, SKD11 |
Published typical values for WC-Co (YG8 / K20). Other grades in the family differ — the certificate supplied with your order carries the actual heat-lot figures.
Everything is done by grinding, wire EDM or sinker EDM. Design in a small corner radius wherever possible — a true sharp internal corner doubles the EDM time.
Machining D3 Tool Steel with CNC Cylindrical Grinding
D3 Tool Steel behaves predictably under CNC Cylindrical Grinding once parameters are dialled in: machinability is machined in the annealed state, then hardened; carbide tooling preferred, and we tune the operation accordingly.
We hold reference parameters for this grade, so repeat orders of D3 Tool Steel run consistently from one batch to the next.
Achievable Tolerances for CNC Cylindrical Grinding D3 Tool Steel
| Feature | Standard | Precision |
|---|---|---|
| Size (OD, ID, thickness) | ±0.005 mm | ±0.002 mm |
| Flatness over 100 mm | 0.010 mm | 0.003 mm |
| Parallelism | 0.010 mm | 0.003 mm |
| Roundness | 0.005 mm | 0.002 mm |
| Squareness | 0.010 mm | 0.005 mm |
| Surface finish | Ra 0.4 µm | Ra 0.1 µm |
| Workpiece hardness | up to 62 HRC | up to 65 HRC |
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.
Why D3 Tool Steel?
D3 Tool Steel is chosen when a part needs what this grade offers — it is wear-resistant and hardenable for tooling. We confirm the grade and any temper or heat-treat condition with you before machining.
CNC Cylindrical Grinding Quality & Inspection
We control quality throughout the process, not just at the end. In-process checks plus final inspection — including CMM where specified — keep every D3 Tool Steel part to print. Inspection reports, material certificates and first-article documentation can be supplied on request.
Secondary Operations & Finishing
Finished D3 Tool Steel parts can move straight into secondary operations under one roof. Typical add-ons are deburring, passivation, anodising, plating, blasting, polishing and laser marking. We coordinate the whole chain so you receive complete, inspection-ready parts.
CNC Cylindrical Grinding Tolerances & Surface Finish
Ground D3 Tool Steel reaches single-micron tolerances on size, flatness and parallelism, with surface finishes down to Ra 0.1–0.4 µm — and a near-mirror finish on suitable alloys.
Final tolerances are governed by the material's behaviour, wall thickness and overall stiffness. We give honest DFM feedback if a callout would be costly or better achieved another way.
Design Tips for CNC Cylindrical Grinding D3 Tool Steel
We are happy to suggest design tweaks that improve manufacturability. Allowing adequate grind stock, specifying realistic flatness over the true datum, and relieving corners help us hit tight tolerances on D3 Tool Steel efficiently. If you send your model early, we will return practical DFM feedback before you commit to production.
Applications of CNC Cylindrical Grinding D3 Tool Steel
Customers order CNC Cylindrical Grinding D3 Tool Steel 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.
How to Order CNC Cylindrical Grinding D3 Tool Steel
Getting a quote is simple. Share your model, the material grade, your quantity and target tolerances. You receive a clear quotation with lead time and honest manufacturability feedback.
Finishing Options for D3 Tool Steel
| 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 Cylindrical Grinding D3 Tool Steel
- 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 D3 Tool Steel 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.
D3 Tool Steel in Other Processes
Related
Send the drawing, the D3 Tool Steel condition and the quantity — pricing and lead time come back the same or next business day.
Request a QuoteFrequently Asked Questions
Why is D3 Tool Steel a good choice for CNC Cylindrical Grinding?
D3 Tool Steel is wear-resistant and hardenable for tooling, which makes it well suited to CNC Cylindrical Grinding. We tune the process to the alloy so the finished D3 Tool Steel grinding part meets your dimensional and functional requirements.
What surface finish is achievable on D3 Tool Steel with CNC Cylindrical Grinding?
Grinding can take D3 Tool 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 Cylindrical Grinding D3 Tool Steel?
CNC Cylindrical Grinding prototypes for D3 Tool 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 tolerances can you hold for CNC Cylindrical Grinding D3 Tool Steel?
Achievable tolerances for D3 Tool 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 Cylindrical Grinding D3 Tool Steel and how is it done?
CNC Cylindrical Grinding D3 Tool Steel refers to cylindrical grinding finishes outer diameters of rotational parts to precise size and roundness. Applied to D3 Tool Steel — wear-resistant and hardenable for tooling — VT machining produces each part to your CAD drawing, selecting parameters from your tolerance, finish and quantity requirements.