VT machining offers CNC Milling for D2 Tool Steel (UNS T30402 / 1.2379 / SKD11), typically supplied annealed or hardened. High-chromium, high wear resistance; harder to grind than A2.
CNC Milling Notes for D2 Tool Steel
D2 Tool Steel mills well with conventional strategies; finishing passes are planned to meet flatness and finish callouts.
For estimating, a 100 × 100 × 10 mm block of D2 Tool Steel weighs about 0.77 kg.
Starting Parameters for CNC Milling D2 Tool Steel
| Cutting speed (carbide) | 70-125 m/min |
|---|---|
| Feed per tooth | 0.028-0.088 mm |
| Spindle speed, Ø10 mm end mill | 2230-3980 rpm |
| Insert / tool class | ISO P — CVD-coated carbide |
| Coolant | Emulsion; neat oil for tapping |
| Thermal growth, 100 mm part, +10 °C | 10.4 µm (CTE 10.4 µm/m·K) |
Starting values for D2 Tool Steel, Annealed or hardened; optimised on the first article.
D2 Tool Steel Data Relevant to CNC Milling
| Equivalent designations | UNS T30402 / 1.2379 / SKD11 |
|---|---|
| Key composition | C ~1.5%, Cr ~12%, Mo, V |
| Typical supply condition | Annealed or hardened |
| Hardness (typical) | ~255 HB annealed; 58-62 HRC hardened |
| Machinability rating | 45% (AISI B1112 = 100%) |
Typical values; we work to your drawing and mill certificate.
How D2 Tool Steel Differs
High-chromium, high wear resistance; harder to grind than A2.
Typical applications: Cutting dies, slitters, wear parts.
D2 Tool Steel vs Similar Grades
| D2 Tool Steel | A2 Tool Steel | D3 Tool Steel | H13 Tool Steel | |
|---|---|---|---|---|
| Key composition | C ~1.5%, Cr ~12%, Mo, V | C ~1%, Cr ~5%, Mo ~1% | C ~2.1%, Cr ~12% | C ~0.4%, Cr ~5%, Mo ~1.3%, V ~1% |
| Hardness | ~255 HB annealed; 58-62 HRC hardened | ~250 HB annealed; 57-62 HRC hardened | Up to ~64 HRC | ~230 HB annealed; 44-52 HRC hardened |
| Machinability % | 45 | 65 | 40 | 70 |
| Typical use | Cutting dies, slitters, wear parts | Blanking dies, punches, gauges | Drawing dies, shear blades | Die-casting dies, extrusion tools, forging dies |
More on CNC Milling Alloy Steel
Finishing options, quality documentation and general cnc milling guidance for all alloy steel grades are on our CNC Milling Alloy Steel page.
No drawing yet? Sketch the part in our free 3D + 2D builder and send it with your RFQ.
Quoting CNC Milling D2 Tool Steel
Send a STEP/IGES model or PDF drawing, confirm D2 Tool Steel and its condition (we usually see it supplied annealed or hardened), the quantity, critical tolerances and any finish or certificate requirements.
D2 Tool Steel in Other Processes
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Send the drawing, the D2 Tool Steel condition and the quantity — pricing and lead time come back the same or next business day.
Request a QuoteFrequently Asked Questions
Which industries use CNC Milling D2 Tool Steel parts?
CNC Milling D2 Tool Steel parts are used across aerospace, medical, automotive, electronics, semiconductor and general industrial sectors — anywhere precise D2 Tool Steel components are required.
What tolerances can you hold for CNC Milling D2 Tool Steel?
Achievable tolerances for D2 Tool Steel machining depend on the alloy, geometry and feature size. Milling holds positional and dimensional tolerances to around ±0.01 mm, tighter with precision setups. Exact figures are confirmed against your drawing callouts.
What material thickness or size range suits CNC Milling D2 Tool Steel?
We machine D2 Tool Steel across a broad size range; share your part envelope for confirmation.
What is the typical lead time and minimum order for CNC Milling D2 Tool Steel?
CNC Milling prototypes for D2 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.
Why is D2 Tool Steel a good choice for CNC Milling?
D2 Tool Steel is wear-resistant and hardenable for tooling, which makes it well suited to CNC Milling. We tune the process to the alloy so the finished D2 Tool Steel machining part meets your dimensional and functional requirements.