Laser vs plasma cutting — which is better, and when

What is the actual difference between laser and plasma cutting?

Laser cutting uses a focused beam of light that melts, burns or vaporizes metal along a narrow line, while an assist gas — oxygen or nitrogen — blows the molten material out of the kerf. Plasma cutting heats a gas to roughly 20,000°C, ionizing it, then uses an electric arc to melt through electrically conductive metal; that means plasma only works on conductive stock and cannot cut glass, wood or plastic. Both run on CNC machines from a vector file (DXF, DWG, AI). The core technical difference is kerf width: a laser kerf is roughly 0.1–0.3mm, a plasma kerf 1.5–4mm — and that single number is where the gap in precision and edge quality comes from.

How thick a metal sheet can each method actually cut?

Usable thickness depends on machine power, alloy, surface and edge requirements. One fixed range does not apply to every laser or plasma system. Plasma may be economical for thick conductive sheet, but consider kerf width, subsequent edge finishing and hole accuracy. Material-specific considerations are covered in the thickness guide; confirm actual capability before ordering.

Which method leaves a cleaner edge?

Laser cutting often offers a narrow kerf and heat-affected zone, which can help with detailed contours and close-fitting parts. With plasma, assess edge taper and underside dross that may need finishing. Results from both methods depend on equipment, material and settings. Agree edge quality and subsequent treatment for visible edges, mounting holes and painted surfaces.

How much do price and turnaround differ?

No single thickness threshold makes one method always cheaper or faster. Cost depends on material, equipment power, cut length, hole count, setup and quantity. Compare the complete finished-part cost, including any grinding or further processing after plasma cutting. Confirm the full timeline, including preparation and finishing, before ordering.

When should you choose laser, and when plasma?

Laser is often considered for thin, detailed contours; plasma may suit simple shapes in thick conductive sheet. A 3mm stainless sign and a 20mm steel bracket require different assessments, but thickness alone does not decide the method. A guillotine suits straight sheet cuts and cannot create complex contours or internal holes. Compare the drawing tolerance, edge requirements and available equipment before selecting a process.

• Laser — detailed geometry and narrow kerf, subject to feasibility
• Plasma — conductive metal; assess subsequent edge finishing
• Guillotine — straight lines only, cannot cut a contour

Which of the two does Craftarea actually do?

These methods require different equipment and preparation. Send the grade, thickness, drawing and quality requirements; confirm the available process and who will perform it before ordering. Describe any bending, milling, turning or waterjet work separately. Agree providers, responsibilities, transport and the complete timeline in the quote.