VT machining offers CNC Milling for S275JR Steel (EN 10025 / 1.0044 / ~A36), typically supplied hot-rolled. Mid-strength European structural steel, yield ≥275 MPa.
CNC Milling Notes for S275JR Steel
S275JR 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 S275JR Steel weighs about 0.79 kg.
Starting Parameters for CNC Milling S275JR 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 S275JR Steel, Hot-rolled; optimised on the first article.
S275JR Steel Data Relevant to CNC Milling
| Equivalent designations | EN 10025 / 1.0044 / ~A36 |
|---|---|
| Key composition | C ≤0.21%, Mn ≤1.5% |
| Typical supply condition | Hot-rolled |
| Hardness (typical) | ~130 HB |
| Machinability rating | 70% (AISI B1112 = 100%) |
Typical values; we work to your drawing and mill certificate.
How S275JR Steel Differs
Mid-strength European structural steel, yield ≥275 MPa.
Typical applications: Structural sections, base plates.
S275JR Steel vs Similar Grades
| S275JR Steel | S235JR Steel | S355JR Steel | 12L14 Steel | |
|---|---|---|---|---|
| Key composition | C ≤0.21%, Mn ≤1.5% | C ≤0.17-0.20%, Mn ≤1.4% | C ≤0.24%, Mn ≤1.6% | C ≤0.15%, S 0.26-0.35%, Pb 0.15-0.35% |
| Hardness | ~130 HB | ~120 HB | ~150 HB | ~80 HRB |
| Tensile (MPa) | 410-560 | 360-510 | 470-630 | ~540 |
| Machinability % | 70 | 70 | 65 | 160 |
| Typical use | Structural sections, base plates | Frames, brackets, weldments | Machine frames, heavy brackets, cranes | High-volume turned parts, hydraulic fittings |
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 S275JR Steel
Send a STEP/IGES model or PDF drawing, confirm S275JR Steel and its condition (we usually see it supplied hot-rolled), the quantity, critical tolerances and any finish or certificate requirements.
S275JR Steel in Other Processes
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Send the drawing, the S275JR Steel condition and the quantity — pricing and lead time come back the same or next business day.
Request a QuoteFrequently Asked Questions
What material thickness or size range suits CNC Milling S275JR Steel?
We machine S275JR Steel across a broad size range; share your part envelope for confirmation.
Which industries use CNC Milling S275JR Steel parts?
CNC Milling S275JR Steel parts are used across aerospace, medical, automotive, electronics, semiconductor and general industrial sectors — anywhere precise S275JR Steel components are required.
What tolerances can you hold for CNC Milling S275JR Steel?
Achievable tolerances for S275JR 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.
Can VT machining make custom S275JR Steel parts to my drawing?
Yes. S275JR Steel machining is made to order from your CAD/2D drawing. Share your geometry, material grade, tolerance and quantity and we will confirm feasibility, lead time and pricing.
What is the typical lead time and minimum order for CNC Milling S275JR Steel?
CNC Milling prototypes for S275JR 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 S275JR Steel a good choice for CNC Milling?
S275JR 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 S275JR Steel machining part meets your dimensional and functional requirements.