Laser, plasma or waterjet: which cutting process for your part
Match the cutting process to material, thickness and edge quality. When laser wins, when plasma is the right cheap answer, and what only waterjet can do.
Quick answer: For sheet and plate up to about 1 inch, laser cutting gives the cleanest edge and tightest tolerance. Plasma is the fast, cheap choice for thick conductive steel where edge quality is secondary. Waterjet cuts anything (stainless, titanium, stone, glass, composite) with no heat-affected zone, but it is the slowest and priced by the minute. Match the process to material, thickness and the edge you need.
The one table that decides it
| Process | Best for | Thickness | Edge quality | Relative cost |
|---|---|---|---|---|
| Laser | Steel, stainless, aluminum sheet and plate | Up to ~1 in | Clean, tight tolerance | Low on thin, fast |
| Plasma | Thick conductive steel plate | ~1/4 to 2 in | Rougher, wider kerf | Cheapest on thick steel |
| Waterjet | Anything, incl. titanium, stone, composite | Up to several in | Smooth, no heat-affected zone | Highest, priced by time |
When laser is the answer
Most sheet-metal and plate work. A fiber laser cuts thin steel, stainless and aluminum fast, clean and to tight tolerance, which is why it is the default in a modern fab shop. It loses its edge past about an inch, and very reflective thick material can be a problem. For Toronto and GTA sheet-metal work, laser is usually the right call.
When plasma is the right cheap answer
Thick conductive plate where you do not need a laser-fine edge: structural steel, heavy brackets, base plates, blanks for weldments. Plasma is the pickup truck of cutting. Not precise, not pretty, moves a lot of steel for the money, and nobody in an Edmonton fab shop apologizes for owning one. If you need tight tolerance or a clean edge, pay for laser or waterjet instead.
When only waterjet will do
Titanium, thick plate, and heat-sensitive material where a heat-affected zone is unacceptable, plus non-metals like stone, glass and composite. Waterjet has no heat-affected zone because it cuts cold, and it holds tight tolerance. The trade is speed: it is priced by the minute, so it is the wrong tool for cheap thin steel. Do not waterjet 10-gauge mild steel by the minute when a laser cuts it in a tenth of the time. Waterjet earns its rate on the jobs the others cannot do. See waterjet shops.
What to send for a quote
Flat DXF or DWG files, the material, grade and thickness, quantity, and your edge-quality and tolerance requirement. Request quotes and we route it to Canadian cutting shops with the right machine for your material.
FAQ
Which is most accurate, laser, plasma or waterjet?
Laser on thin-to-medium material, waterjet on thick or exotic material. Plasma is the least precise of the three, which is the trade for its speed and low cost on thick steel.
Can a laser cut thick steel?
Up to about an inch on a strong fiber laser, more on high-power machines, but past that plasma or waterjet get more economical. Reflective thick material also gives lasers trouble.
Why is waterjet so expensive?
It is slow and priced by cutting time, and abrasive is a consumable. You pay for what it uniquely does: no heat-affected zone, and it cuts titanium, stone, glass and composite that the others cannot.
What is a heat-affected zone and when does it matter?
Laser and plasma cut with heat, which slightly changes the metal at the edge. For most parts that is fine. For heat-sensitive alloys, hardened material, or parts machined right at the edge, waterjet's cold cut avoids it.
Which cutting process is cheapest?
For thin steel, laser (fast). For thick steel, plasma. Waterjet is the priciest per part but the only option for some materials. Cheapest overall depends on your material and thickness.
Last reviewed: July 2026. Related reading: MIG vs TIG welding and what powder coating costs.
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