VT machining offers CNC Broaching for Q345 Steel (GB/T 1591 (now Q355) / ~S355JR), typically supplied hot-rolled. Chinese low-alloy high-strength steel; replaced by Q355 in GB/T 1591-2018.
CNC Broaching Notes for Q345 Steel
Q345 Steel broaches well for keyways, splines and internal forms; we set the tooth rise per tooth for this grade.
For estimating, a 100 × 100 × 10 mm block of Q345 Steel weighs about 0.79 kg.
Process Data for CNC Broaching Q345 Steel
| Broaching speed (HSS-E) | 3.7-7.4 m/min |
|---|---|
| Rise per tooth | 0.03-0.06 mm |
| Lubricant | Sulphurised broaching oil |
Typical values for Q345 Steel, Hot-rolled; confirmed on the first part.
Full material data for Q345 Steel (GB/T 1591 (now Q355) / ~S355JR) is on the CNC Milling Q345 Steel page.
More on CNC Broaching Steel
Finishing options, quality documentation and general cnc broaching guidance for all steel grades are on our CNC Broaching Steel page.
No drawing yet? Sketch the part in our free 3D + 2D builder and send it with your RFQ.
Quoting CNC Broaching Q345 Steel
Send a STEP/IGES model or PDF drawing, confirm Q345 Steel and its condition (we usually see it supplied hot-rolled), the quantity, critical tolerances and any finish or certificate requirements.
Q345 Steel in Other Processes
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Send the drawing, the Q345 Steel condition and the quantity — pricing and lead time come back the same or next business day.
Request a QuoteFrequently Asked Questions
What surface finish is achievable on Q345 Steel with CNC Broaching?
Surface finish on Q345 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 Broaching Q345 Steel?
CNC Broaching prototypes for Q345 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.
What tolerances can you hold for CNC Broaching Q345 Steel?
Achievable tolerances for Q345 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 Q345 Steel parts to my drawing?
Yes. Q345 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 CNC Broaching Q345 Steel and how is it done?
CNC Broaching Q345 Steel refers to broaching pushes a toothed tool through or across a part to form keyways, splines and internal profiles. Applied to Q345 Steel — strong, economical and widely available — VT machining produces each part to your CAD drawing, selecting parameters from your tolerance, finish and quantity requirements.
Why is Q345 Steel a good choice for CNC Broaching?
Q345 Steel is strong, economical and widely available, which makes it well suited to CNC Broaching. We tune the process to the alloy so the finished Q345 Steel machining part meets your dimensional and functional requirements.