VT machining offers CNC Milling for A2 Tool Steel (UNS T30102 / 1.2363 / SKD12), typically supplied annealed or hardened. Air-hardening with very low distortion; tougher than D2.
CNC Milling Notes for A2 Tool Steel
A2 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 A2 Tool Steel weighs about 0.79 kg.
Starting Parameters for CNC Milling A2 Tool Steel
| Cutting speed (carbide) | 100-180 m/min |
|---|---|
| Feed per tooth | 0.028-0.088 mm |
| Spindle speed, Ø10 mm end mill | 3180-5730 rpm |
| Insert / tool class | ISO P — CVD-coated carbide |
| Coolant | Emulsion; neat oil for tapping |
| Thermal growth, 100 mm part, +10 °C | 11 µm (CTE 11 µm/m·K) |
Starting values for A2 Tool Steel, Annealed or hardened; optimised on the first article.
A2 Tool Steel Data Relevant to CNC Milling
| Equivalent designations | UNS T30102 / 1.2363 / SKD12 |
|---|---|
| Key composition | C ~1%, Cr ~5%, Mo ~1% |
| Typical supply condition | Annealed or hardened |
| Hardness (typical) | ~250 HB annealed; 57-62 HRC hardened |
| Machinability rating | 65% (AISI B1112 = 100%) |
Typical values; we work to your drawing and mill certificate.
How A2 Tool Steel Differs
Air-hardening with very low distortion; tougher than D2.
Typical applications: Blanking dies, punches, gauges.
A2 Tool Steel vs Similar Grades
| A2 Tool Steel | D2 Tool Steel | D3 Tool Steel | H13 Tool Steel | |
|---|---|---|---|---|
| Key composition | C ~1%, Cr ~5%, Mo ~1% | C ~1.5%, Cr ~12%, Mo, V | C ~2.1%, Cr ~12% | C ~0.4%, Cr ~5%, Mo ~1.3%, V ~1% |
| Hardness | ~250 HB annealed; 57-62 HRC hardened | ~255 HB annealed; 58-62 HRC hardened | Up to ~64 HRC | ~230 HB annealed; 44-52 HRC hardened |
| Machinability % | 65 | 45 | 40 | 70 |
| Typical use | Blanking dies, punches, gauges | Cutting dies, slitters, wear parts | 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 A2 Tool Steel
Send a STEP/IGES model or PDF drawing, confirm A2 Tool Steel and its condition (we usually see it supplied annealed or hardened), the quantity, critical tolerances and any finish or certificate requirements.
A2 Tool Steel in Other Processes
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Send the drawing, the A2 Tool Steel condition and the quantity — pricing and lead time come back the same or next business day.
Request a QuoteFrequently Asked Questions
Does CNC Milling A2 Tool Steel require dedicated tooling?
Most A2 Tool Steel machining work uses standard cutting tools and CNC programs; dedicated fixtures are made only when geometry or volume requires them.
What material thickness or size range suits CNC Milling A2 Tool Steel?
We machine A2 Tool Steel across a broad size range; share your part envelope for confirmation.
What is CNC Milling A2 Tool Steel and how is it done?
CNC Milling A2 Tool Steel refers to multi-axis milling cutters remove material to produce prismatic features, pockets, slots and contoured 3D surfaces. Applied to A2 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.
What tolerances can you hold for CNC Milling A2 Tool Steel?
Achievable tolerances for A2 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.
Which industries use CNC Milling A2 Tool Steel parts?
CNC Milling A2 Tool Steel parts are used across aerospace, medical, automotive, electronics, semiconductor and general industrial sectors — anywhere precise A2 Tool Steel components are required.