Table of Contents
1Technology Overview
Fiber Laser
Focused laser beam melts/vaporizes metal. 1,064nm wavelength, high beam quality.
0.5–80mm metalsPlasma
Ionized gas jet melts metal. Electrically conductive materials only.
3–150mm conductive metalsWaterjet
High-pressure water + abrasive erodes material. No heat-affected zone.
Any material, any thicknessFlame (Oxy-fuel)
Oxidation reaction burns carbon steel. Lowest capital cost.
6–300mm carbon steel only2Cut Quality Comparison
| Quality Metric | Fiber Laser | Plasma | Waterjet | Flame |
|---|---|---|---|---|
| Kerf width | 0.1–0.3mm | 1–3mm | 0.8–1.5mm | 1–3mm |
| Dimensional accuracy | ±0.1mm | ±0.5–1mm | ±0.1–0.3mm | ±1–2mm |
| Surface roughness (Ra) | 1–4 μm | 5–20 μm | 3–8 μm | 20–50 μm |
| Heat-affected zone | Minimal (0.1–0.5mm) | Significant (1–3mm) | None | Large (2–5mm) |
| Dross/slag | None–minimal | Moderate | None | Significant |
| Post-processing needed | Usually none | Grinding required | Usually none | Always required |
Winner: Fiber Laser for thin to medium sheet metal. Waterjet matches laser quality for thick plate but at much lower speed. Plasma and flame require secondary operations for most precision applications.
3Speed & Productivity
| Material / Thickness | Fiber Laser (12kW) | Plasma (200A) | Waterjet |
|---|---|---|---|
| Carbon steel 3mm | 80 m/min | 10 m/min | 0.5 m/min |
| Carbon steel 10mm | 10 m/min | 5 m/min | 0.15 m/min |
| Carbon steel 25mm | 2 m/min | 2.5 m/min | 0.05 m/min |
| Carbon steel 50mm | 0.4 m/min | 1.5 m/min | 0.02 m/min |
| Stainless 5mm | 35 m/min | 4 m/min | 0.3 m/min |
| Aluminum 10mm | 20 m/min | 6 m/min | 0.2 m/min |
Winner: Fiber Laser by a large margin for sheet metal. Plasma becomes competitive above 25mm. Waterjet is 10–50× slower but has no heat-affected zone.
4Material & Thickness Range
| Material | Fiber Laser | Plasma | Waterjet | Flame |
|---|---|---|---|---|
| Carbon steel | ✅ 0.5–80mm | ✅ 3–150mm | ✅ Any | ✅ 6–300mm |
| Stainless steel | ✅ 0.5–60mm | ✅ 3–100mm | ✅ Any | ❌ No |
| Aluminum | ✅ 0.5–50mm | ✅ 3–80mm | ✅ Any | ❌ No |
| Copper/Brass | ✅ 0.5–25mm | ⚠️ Difficult | ✅ Any | ❌ No |
| Titanium | ✅ 0.5–30mm | ⚠️ Possible | ✅ Any | ❌ No |
| Non-metals | ⚠️ Limited | ❌ No | ✅ Any | ❌ No |
5Total Cost of Ownership
| Cost Component | Fiber Laser | Plasma | Waterjet | Flame |
|---|---|---|---|---|
| Capital cost (6kW/equiv) | $80–150K | $40–80K | $100–200K | $15–40K |
| Operating cost/hr | $8–15 | $12–20 | $25–45 | $5–10 |
| Consumables/month | $200–500 | $500–1,500 | $800–2,000 | $100–300 |
| Maintenance/year | $3–8K | $5–15K | $8–20K | $2–5K |
| Labor (operators) | 0.5 FTE | 1 FTE | 1 FTE | 1.5 FTE |
6Best Application by Industry
Automotive
Fiber LaserHigh-speed thin sheet, tight tolerances, no secondary operations
Aerospace
Fiber Laser / WaterjetLaser for aluminum/titanium sheet; waterjet for heat-sensitive alloys
Heavy Construction
Plasma / FlameThick plate (>25mm), lower quality acceptable, cost-sensitive
Electronics
Fiber LaserUltra-thin materials, precision cutouts, minimal heat damage
HVAC
Fiber LaserGalvanized and stainless sheet, high volume, consistent quality
Stone/Glass/Composites
WaterjetOnly technology that can cut non-metals without heat damage
7Decision Guide: Which Technology to Choose?
If cutting steel/aluminum/stainless ≤ 25mm
→ Fiber Laser
Best quality, speed, and operating cost
If cutting carbon steel 25–80mm
→ High-power Fiber Laser or Plasma
Compare based on quality requirements and volume
If cutting carbon steel > 80mm
→ Plasma or Flame
Fiber laser becomes cost-prohibitive at extreme thickness
If cutting heat-sensitive materials (composites, stone, glass)
→ Waterjet
Only cold-cutting technology
If cutting reflective metals (copper, brass) at volume
→ Fiber Laser
CO2 and plasma struggle; fiber laser excels
If budget is the primary constraint
→ Plasma or Flame
Lowest capital cost; accept lower quality
Still Unsure? Talk to Our Engineers
Our application engineers can analyze your specific parts, materials, and volumes to recommend the optimal cutting technology and configuration.