VT machining offers CNC Laser Cutting 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 Laser Cutting Notes for Q345 Steel
Fibre-laser cutting of Q345 Steel sheet gives a narrow kerf with minimal burr.
For estimating, a 100 × 100 × 10 mm block of Q345 Steel weighs about 0.79 kg.
Process Data for CNC Laser Cutting Q345 Steel
| Max practical thickness (6 kW fibre) | 25 mm |
|---|---|
| Assist gas | Oxygen |
| Kerf width | 0.1-0.3 mm |
| Profile tolerance | ±0.1 mm (≤6 mm), ±0.2 mm thicker |
Typical values for Q345 Steel, Hot-rolled; confirmed on the first part.
Q345 Steel Data Relevant to CNC Laser Cutting
| Equivalent designations | GB/T 1591 (now Q355) / ~S355JR |
|---|---|
| Key composition | C ≤0.20%, Mn ≤1.7% |
| Density | 7.85 g/cm³ |
Typical values; we work to your drawing and mill certificate.
More on CNC Laser Cutting Steel
Finishing options, quality documentation and general cnc laser cutting guidance for all steel grades are on our CNC Laser Cutting Steel page.
No drawing yet? Sketch the part in our free 3D + 2D builder and send it with your RFQ.
Quoting CNC Laser Cutting 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 tolerances can you hold for CNC Laser Cutting Q345 Steel?
Achievable tolerances for Q345 Steel cutting depend on the alloy, geometry and feature size. Laser cutting holds contour tolerances to around ±0.05 mm depending on thickness. Exact figures are confirmed against your drawing callouts.
How clean are the edges produced by CNC Laser Cutting on Q345 Steel?
Laser cutting leaves Q345 Steel with a narrow kerf and a clean, near burr-free edge and only a small heat-affected zone.
Why is Q345 Steel a good choice for CNC Laser Cutting?
Q345 Steel is strong, economical and widely available, which makes it well suited to CNC Laser Cutting. We tune the process to the alloy so the finished Q345 Steel cutting part meets your dimensional and functional requirements.
What surface finish is achievable on Q345 Steel with CNC Laser Cutting?
Laser cutting leaves a clean cut face on Q345 Steel with a small heat-affected zone; most parts need little secondary finishing.
What material thickness or size range suits CNC Laser Cutting Q345 Steel?
Laser-cut Q345 Steel thickness depends on the alloy and its reflectivity; we tune the fiber source and assist gas accordingly.
What is the typical lead time and minimum order for CNC Laser Cutting Q345 Steel?
CNC Laser Cutting 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.