VT machining offers CNC Milling for S235JR Steel (EN 10025 / 1.0038 / ~Q235B / ~A36), typically supplied hot-rolled. European base structural steel, yield ≥235 MPa.
CNC Milling Notes for S235JR Steel
S235JR 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 S235JR Steel weighs about 0.79 kg.
Starting Parameters for CNC Milling S235JR Steel
| Cutting speed (carbide) | 170-300 m/min |
|---|---|
| Feed per tooth | 0.035-0.123 mm |
| Spindle speed, Ø10 mm end mill | 5410-9550 rpm |
| Insert / tool class | ISO P — CVD-coated carbide |
| Coolant | Emulsion (5-8%); dry is possible for interrupted cuts |
| Thermal growth, 100 mm part, +10 °C | 11.7 µm (CTE 11.7 µm/m·K) |
Starting values for S235JR Steel, Hot-rolled; optimised on the first article.
S235JR Steel Data Relevant to CNC Milling
| Equivalent designations | EN 10025 / 1.0038 / ~Q235B / ~A36 |
|---|---|
| Key composition | C ≤0.17-0.20%, Mn ≤1.4% |
| Typical supply condition | Hot-rolled |
| Hardness (typical) | ~120 HB |
| Machinability rating | 70% (AISI B1112 = 100%) |
Typical values; we work to your drawing and mill certificate.
How S235JR Steel Differs
European base structural steel, yield ≥235 MPa.
Typical applications: Frames, brackets, weldments.
S235JR Steel vs Similar Grades
| S235JR Steel | 12L14 Steel | S275JR Steel | 1215 Steel | |
|---|---|---|---|---|
| Key composition | C ≤0.17-0.20%, Mn ≤1.4% | C ≤0.15%, S 0.26-0.35%, Pb 0.15-0.35% | C ≤0.21%, Mn ≤1.5% | C ≤0.09%, S 0.26-0.35%, P |
| Hardness | ~120 HB | ~80 HRB | ~130 HB | ~80 HRB |
| Tensile (MPa) | 360-510 | ~540 | 410-560 | ~540 |
| Machinability % | 70 | 160 | 70 | 136 |
| Typical use | Frames, brackets, weldments | High-volume turned parts, hydraulic fittings | Structural sections, base plates | Screw-machine parts, fittings, couplings |
More on CNC Milling Steel
Finishing options, quality documentation and general cnc milling guidance for all steel grades are on our CNC Milling Steel page.
No drawing yet? Sketch the part in our free 3D + 2D builder and send it with your RFQ.
Quoting CNC Milling S235JR Steel
Send a STEP/IGES model or PDF drawing, confirm S235JR Steel and its condition (we usually see it supplied hot-rolled), the quantity, critical tolerances and any finish or certificate requirements.
S235JR Steel in Other Processes
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Send the drawing, the S235JR Steel condition and the quantity — pricing and lead time come back the same or next business day.
Request a QuoteFrequently Asked Questions
Why is S235JR Steel a good choice for CNC Milling?
S235JR Steel is strong, economical and widely available, which makes it well suited to CNC Milling. We tune the process to the alloy so the finished S235JR Steel machining part meets your dimensional and functional requirements.
What tolerances can you hold for CNC Milling S235JR Steel?
Achievable tolerances for S235JR 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 is CNC Milling S235JR Steel and how is it done?
CNC Milling S235JR Steel refers to multi-axis milling cutters remove material to produce prismatic features, pockets, slots and contoured 3D surfaces. Applied to S235JR Steel — strong, economical and widely available — VT machining produces each part to your CAD drawing, selecting parameters from your tolerance, finish and quantity requirements.
What surface finish is achievable on S235JR Steel with CNC Milling?
Surface finish on S235JR Steel is controlled to your specification; we confirm the achievable Ra against your callout.
What is the typical lead time and minimum order for CNC Milling S235JR Steel?
CNC Milling prototypes for S235JR 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.