Arc Segment Laser Cutting
Curved segments cut straight from flat plate — ring segments, stiffener rings, and large-diameter curved profiles. No rolling operation. No second vendor.
Cut the Curve, Skip the Roll
A curved segment is normally a forming job. Plate or bar goes to a rolling house, comes back at radius, and then someone else lays out and drills it. Two vendors, two lead times, and a hole pattern laid out on a part that has already moved.
We cut the arc directly from flat plate. The radius, the bolt holes, the notches, and the end cuts all come out of the same file in the same operation — so the geometry has one source instead of three. Segments leave the shop with every surface deslagged and every hole deburred.
What We Cut
- Ring and flange segments — full rings split into arcs, or arcs cut to a specified included angle.
- Stiffener rings, wear rings, and backing rings — plain or bolted, in matched sets.
- Large-diameter curved profiles that exceed what one plate can hold, cut as segments and matched at the joints.
- Repeat sets nested together, so every segment in a set shares the same radius and the same program.
Where Arc Cutting Is Not the Answer
An arc segment cut from flat plate stays flat. It is a curve in plan view, not a curve through the section. If your part has to wrap a cylinder — a shell course, a rolled plate section, a true helical form — that is a forming job, and you need a rolling house rather than us. We cut flat plate only.
Yield is worth checking before you call. A large-radius arc nested from flat plate leaves scrap in the middle, and on thin material at a wide radius, rolled bar is usually cheaper per piece. Arc cutting pulls ahead as the plate gets thicker, the hole count climbs, and the quantity drops — which happens to be where rolling houses are slowest to schedule.
We walk through that trade in detail, including the arithmetic worth running first, in Rolled Rings vs. Cut Arc Segments.
Industries We Serve
Pressure vessel fabricators, heat exchanger manufacturers, equipment builders, and plant maintenance teams across the Gulf Coast and the United States call Roosevelt Steel Co. when a curved part is holding up a build.
| Max Thickness | 3.5 inches |
| Max Plate Size | 80 × 160 inches |
| Segment Geometry | Any radius and included angle within plate size |
| Material Form | Flat plate only — no rolling or forming |
| Materials | Stainless, carbon, aluminum, exotic alloys |
| Finishing | Every surface deslagged, every hole deburred |
| Documentation | MTRs available on request |
| File Formats | DXF, DWG, or PDF — hand-drawn prints accepted |
Why Laser-Cut Arc Segments on Our High-Powered Laser
Rolling adds a process step, a vendor, and a tolerance stack. Cutting the arc removes all three:
- A forming operation deleted. The radius comes from the file rather than a roll setup, so there is no springback to chase and no trial bend to pay for.
- Holes and curve in one operation. Bolt holes, slots, and notches are cut from the same file as the arc, so the pattern is true to the radius instead of being laid out afterward on a formed part.
- Orders of magnitude faster. A set of segments comes off the laser while a rolling house is still scheduling the job.
- Matched sets, not near-misses. Every segment in a set is cut from one nest on one program, so the radii agree at every joint.
- Thick stock is not a problem. Our 30 kW laser cuts arcs up to 3.5″ thick, including alloys that are slow to drill and punishing to roll.
Send the drawing as a DXF, DWG, or PDF and hear back promptly. Working from an old hand-drawn print or a marked-up photocopy? Send that too — we convert hand drawings to CAD in house. MTRs are available on request.