VT machining offers CNC Tapping for S355JR Steel (EN 10025 / 1.0045 / ~Q345B), typically supplied hot-rolled. Higher-strength structural steel, yield ≥355 MPa.
CNC Tapping Notes for S355JR Steel
S355JR Steel is ductile enough for form (roll) tapping, which gives stronger, chip-free threads; cut taps are used where the drawing or material condition requires.
For estimating, a 100 × 100 × 10 mm block of S355JR Steel weighs about 0.79 kg.
Starting Parameters for CNC Tapping S355JR Steel
| Cutting speed (carbide) | 15-25 m/min |
|---|---|
| Recommended tap | Form (roll) tap — chipless |
| Tap drill for M8×1.25 | Ø7.4 mm (form tap) |
| Spindle speed, M8 | 600-990 rpm |
| Insert / tool class | ISO P — CVD-coated carbide |
| Coolant | Emulsion (5-8%); dry is possible for interrupted cuts |
Starting values for S355JR Steel, Hot-rolled; optimised on the first article.
Full material data for S355JR Steel (EN 10025 / 1.0045 / ~Q345B) is on the CNC Milling S355JR Steel page.
More on CNC Tapping Steel
Finishing options, quality documentation and general cnc tapping guidance for all steel grades are on our CNC Tapping Steel page.
No drawing yet? Sketch the part in our free 3D + 2D builder and send it with your RFQ.
Quoting CNC Tapping S355JR Steel
Send a STEP/IGES model or PDF drawing, confirm S355JR Steel and its condition (we usually see it supplied hot-rolled), the quantity, critical tolerances and any finish or certificate requirements.
S355JR Steel in Other Processes
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Send the drawing, the S355JR Steel condition and the quantity — pricing and lead time come back the same or next business day.
Request a QuoteFrequently Asked Questions
What tolerances can you hold for CNC Tapping S355JR Steel?
Achievable tolerances for S355JR 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 the typical lead time and minimum order for CNC Tapping S355JR Steel?
CNC Tapping prototypes for S355JR 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.
Can VT machining make custom S355JR Steel parts to my drawing?
Yes. S355JR 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 surface finish is achievable on S355JR Steel with CNC Tapping?
Surface finish on S355JR Steel is controlled to your specification; we confirm the achievable Ra against your callout.
Why is S355JR Steel a good choice for CNC Tapping?
S355JR Steel is strong, economical and widely available, which makes it well suited to CNC Tapping. We tune the process to the alloy so the finished S355JR Steel machining part meets your dimensional and functional requirements.