[LOADING GUIDES...]
Application advice
Send your material, thickness, machine power, budget, or supplier question. We can help translate the guide into practical next steps.
Comprehensive cutting speed data for fiber and CO2 lasers across various materials and thicknesses. Use this reference to estimate production times and optimize your cutting parameters.
Select material, thickness, laser type, and power from the chart.
Output: Baseline cutting speed in m/min
Use the speed tableApply quality, material condition, and geometry multipliers before quoting.
Output: Adjusted speed for your edge quality target
Apply speed factorsAdd cut length, pierce count, pierce time, and positioning time.
Output: Cycle time and parts per hour
Open cutting time calculatorCombine cycle time with machine hourly rate, gas, electricity, and material cost.
Output: Quote-ready cost per part
Estimate cutting costExport Asset
Get a professional PDF with the quoting workflow, real-world adjustment rules, and a condensed reference table for shop-floor use.
Note: These are typical speeds under optimal conditions. Your actual speeds may vary based on equipment condition, material quality, and specific cutting requirements.
Visual representations of how power, thickness, materials, and gas types affect cutting speeds
Mild Steel - 10mm thickness (Diminishing returns at higher power)
3kW Fiber Laser - Mild Steel (Logarithmic relationship)
6kW laser power - 5mm thickness
Mild Steel - 3kW Fiber Laser (Oxygen vs Nitrogen)
Speed adjustments from baseline (Standard = 10 m/min)
Note: Higher quality requires slower speeds to achieve better edge finish, tighter tolerances, and minimal dross. Choose based on your application requirements.
Cutting speed is perhaps the most visible performance metric in laser cutting, directly impacting production throughput and operational costs. However, the relationship between laser power, material properties, and achievable cutting speed is complex and non-linear. Understanding these dynamics enables better equipment selection and process optimization.
Laser cutting speed is fundamentally limited by the rate at which material can be heated to melting/vaporization temperature and ejected from the kerf. This involves three simultaneous processes: energy absorption, heat conduction into surrounding material, and melt ejection via assist gas. The balance between these processes determines maximum achievable speed.
For thin materials (0.5-3mm), heat conduction is the limiting factor. Energy quickly dissipates laterally, requiring high power density (small focus spot) and fast traverse to maintain cutting. This is why fiber lasers with excellent beam quality (M² < 1.2) excel at thin sheet cutting, achieving speeds of 20-40 m/min on 1mm steel with just 2-3kW power.
For thick materials (12mm+), melt ejection becomes the bottleneck. Even with sufficient power to melt material, assist gas must physically remove molten metal through the entire thickness. This requires high gas pressure (15-20 bar for nitrogen) and larger nozzles, but ultimately limits speed regardless of available power. A 12kW laser cutting 20mm steel typically maxes out at 1.5-2.0 m/min, not due to power limitations but melt dynamics.
Different materials exhibit dramatically different cutting speed profiles. Carbon steel benefits from oxygen-assist cutting, where the exothermic reaction between oxygen and iron contributes 30-40% of total cutting energy. This allows speeds 40-60% faster than nitrogen cutting. For example, 3kW cutting 6mm mild steel: oxygen achieves 3.5 m/min versus nitrogen at 2.2 m/min.
Stainless steel's low thermal conductivity means heat stays concentrated in the cutting zone, theoretically beneficial for cutting. However, its high reflectivity at 1.06μm (fiber laser wavelength) and tendency to oxidize require nitrogen assist, reducing speeds 20-30% compared to carbon steel of equivalent thickness. The quality-speed tradeoff is particularly pronounced: achieving mirror-finish edges on stainless requires reducing speed by an additional 25-30% below standard production speeds.
Aluminum presents the greatest challenge for fiber lasers due to extreme reflectivity (>90% at 1.06μm) and high thermal conductivity. Successful aluminum cutting requires 30-50% more power than equivalent steel thickness. Modern fiber lasers with specialized aluminum cutting modes employ dynamic power modulation and optimized beam characteristics to improve aluminum absorption, achieving speeds approaching 70-80% of steel cutting rates rather than the traditional 50-60%. Learn more about material absorption characteristics.
A common misconception is that doubling laser power doubles cutting speed. In reality, the relationship follows a power law with diminishing returns, especially on thinner materials. For thin materials (1-3mm), upgrading from 2kW to 4kW increases speed significantly, but pushing ultra-high power on 1mm material hits mechanical acceleration limits of the machine gantry before optical limits.
This non-linearity stems from heat dissipation dynamics. At extreme speeds (e.g., 60+ m/min), the CNC drives and acceleration parameters dictate throughput more than raw optical power. For thick materials (15mm+), the bottleneck shifts to assist gas dynamics—there is a maximum rate at which molten metal can be physically blown out of a deep kerf.
The 15kW-20kW Shift: Upgrading from 3kW to 6kW provides substantial generalized speed gains (50-70% faster on 6-8mm steel). Moving into the 15kW to 20kW range changes the process again: the table shows 25mm mild steel moving from roughly 0.5 m/min at 6kW to 2.5 m/min at 20kW under suitable assist-gas conditions. At these power levels, capability expansion matters as much as marginal speed scaling.
The speeds shown in reference tables represent standard production quality - smooth edges with minimal dross, acceptable for most fabrication applications. However, different applications demand different quality levels, requiring speed adjustments:
The cutting speeds in reference tables assume optimal conditions: clean material, proper focus, fresh nozzles, optimal gas pressure, and stable power output. Real-world conditions introduce variability that affects achievable speeds:
Material surface condition significantly impacts speed. Mill scale, rust, or oil on steel surfaces can reduce effective cutting speed by 10-20%. Pre-painted or galvanized materials require 15-25% speed reduction to avoid burning coatings beyond the cut edge. Material flatness matters too - warped sheets require slower speeds to maintain consistent focus distance, or risk incomplete cuts.
Equipment condition is critical. Worn nozzles reduce gas flow efficiency, requiring 5-10% speed reduction. Contaminated optics reduce delivered power, effectively operating as if with lower power. Focus drift due to thermal effects in continuous operation can reduce effective cutting speed by 10-15% after several hours of operation without recalibration. See our process optimization guide for maintenance best practices.
High-efficiency metal cutting - Best for steel, stainless steel, aluminum
| Thickness (mm) | 1kW | 2kW | 3kW | 4kW | 6kW | 8kW | 12kW | 15kW | 20kW |
|---|---|---|---|---|---|---|---|---|---|
| 1mm | 15 m/min | 25 m/min | 35 m/min | 45 m/min | 60 m/min | 75 m/min | 90 m/min | — | — |
| 2mm | 8 m/min | 14 m/min | 20 m/min | 26 m/min | 35 m/min | 45 m/min | 60 m/min | — | — |
| 3mm | 4 m/min | 7 m/min | 10 m/min | 14 m/min | 20 m/min | 26 m/min | 38 m/min | — | — |
| 5mm | 2 m/min | 3.5 m/min | 5 m/min | 7 m/min | 10 m/min | 13 m/min | 20 m/min | — | — |
| 8mm | 0.9 m/min | 1.8 m/min | 2.5 m/min | 3.5 m/min | 5 m/min | 6.5 m/min | 10 m/min | — | — |
| 10mm | 0.6 m/min | 1.2 m/min | 1.8 m/min | 2.5 m/min | 3.5 m/min | 4.5 m/min | 7 m/min | — | — |
| 12mm | — | 0.8 m/min | 1.2 m/min | 1.7 m/min | 2.5 m/min | 3.2 m/min | 5 m/min | — | — |
| 15mm | — | 0.5 m/min | 0.8 m/min | 1.2 m/min | 1.8 m/min | 2.3 m/min | 3.5 m/min | — | — |
| 20mm | — | — | 0.4 m/min | 0.6 m/min | 1 m/min | 1.4 m/min | 2 m/min | 2.8 m/min | — |
| 25mm | — | — | — | — | 0.5 m/min | 0.7 m/min | 1.2 m/min | 1.8 m/min | 2.5 m/min |
Versatile non-metal cutting - Best for acrylic, wood, plastics
| Thickness (mm) | 60W | 80W | 100W | 130W | 150W | 180W | 200W | 300W |
|---|---|---|---|---|---|---|---|---|
| 3mm | 15 m/min | 20 m/min | 25 m/min | 30 m/min | 35 m/min | 42 m/min | — | — |
| 5mm | 8 m/min | 12 m/min | 15 m/min | 18 m/min | 22 m/min | 26 m/min | — | — |
| 8mm | — | 6 m/min | 8 m/min | 10 m/min | 12 m/min | 15 m/min | — | — |
| 10mm | — | — | 6 m/min | 8 m/min | 10 m/min | 12 m/min | 14 m/min | — |
| 15mm | — | — | — | 4 m/min | 5 m/min | 6.5 m/min | 8 m/min | 12 m/min |
| 20mm | — | — | — | — | 3 m/min | 4 m/min | 5 m/min | 8 m/min |
Calculate realistic production time including piercing, positioning, and quality adjustments
From speed table above
From piercing time data
Add 20-30% buffer for complete cycle time
Compare production time and estimated machine-hour costs using the same fiber laser speed data as the chart
• The 12kW laser is 100% faster than the 6kW laser
• You save 863.1 seconds per part with the higher power laser
• The higher power laser is $5.90 cheaper per part despite higher operating costs
For high-volume production, time savings can justify higher equipment costs:
Note: This is a simplified comparison. Actual ROI depends on equipment purchase price, financing costs, maintenance, and your specific production volume.
Aluminum presents unique challenges for fiber laser cutting: > 90% reflectivity at 1.06μm, high thermal conductivity (237 W/m·K vs 50 W/m·K for steel), and tendency to produce heavy dross. These factors reduce achievable speeds by 30-50% compared to equivalent-thickness steel.
| Thickness | 3kW | 6kW | 12kW | Gas |
|---|---|---|---|---|
| 1mm | 8-12 m/min | 15-22 m/min | 25-35 m/min | N₂ 12-16 bar |
| 2mm | 4-6 m/min | 8-12 m/min | 16-22 m/min | N₂ 14-18 bar |
| 3mm | 2-3.5 m/min | 5-8 m/min | 10-15 m/min | N₂ 16-20 bar |
| 5mm | 0.8-1.5 m/min | 2-3.5 m/min | 5-8 m/min | N₂ 18-22 bar |
| 8mm | Not recommended | 0.8-1.5 m/min | 2.5-4 m/min | N₂ 20-25 bar |
| 10mm | Not recommended | 0.5-0.8 m/min | 1.5-2.5 m/min | N₂ 22-28 bar |
Actual speeds depend on many factors: equipment condition, material quality variations, assist gas pressure, nozzle condition, focus quality, and your specific quality requirements. These charts show typical speeds under optimal conditions.
You can increase speed for rough cuts, but edge quality will suffer. The speeds shown are for standard production quality. Reduce speed by 20-30% for high-precision work, or increase by 10-20% for rough cutting where edge quality is not critical.
Interpolate between nearby power levels. For example, if you have a 5kW laser and the table shows 4kW and 6kW, your speed will be approximately midway between those values.
For carbon steel: Use oxygen for maximum speed (speeds shown in table). Use nitrogen for oxidation-free edges (reduce speed by 30-40%). For stainless steel and aluminum: Always use nitrogen to prevent oxidation.
Piercing time can be significant, especially for parts with many holes or complex geometries. For thick materials (10mm+), piercing can take 1-3 seconds per pierce. On a part with 50 pierces, this adds 50-150 seconds to production time.
Gas pressure increases with material thickness. For mild steel with oxygen: 0.5-1.0 bar for thin materials, up to 5-6 bar for 20mm+. For nitrogen cutting: 10-14 bar for thin materials, up to 25-30 bar for thick materials.
Reduce speed by 10-15% for light rust, 20-25% for heavy rust or mill scale. For painted materials, reduce speed by 15-20%. Galvanized materials require 25-30% speed reduction. Clean material whenever possible for best results.
Worn nozzles reduce gas flow efficiency and focus quality, requiring 5-15% speed reduction depending on wear severity. Replace nozzles every 100-200 pierces for thick materials, or when you notice increased dross or incomplete cuts.
Account for: cutting time (length ÷ speed), piercing time (number of pierces × pierce time), positioning time (~0.5s per pierce), and geometry complexity (reduce effective speed by 15-50% for parts with many corners or curves). Add 20-30% buffer for sheet loading, part removal, and inspection.
Related Export Assets
When this chart starts driving quoting, gas planning, or machine selection, teams usually need a structured cost matrix, a capability cross-check, and a gas benchmark they can circulate internally.
Process-economic matrix that ties real parameter-sheet speeds to assist-gas cost per hour and per meter.
Source: Derived from the material parameter database and the Gas Flow Calculator operating-cost model.
Power-band capability summary pulled from the live material parameter dataset for carbon steel, stainless, and aluminum.
Source: Derived directly from the material-thickness parameter dataset already powering the site cheat sheet.
Operational benchmark comparing flow, annual gas spend, supply burden, and edge-quality tradeoffs across the main assist gases.
Source: Computed from the Gas Flow Calculator using standard shop-hour assumptions and the in-repo gas option data.
| Reality Check | Adjustment | When to Apply |
|---|---|---|
| High-quality edge requirement | Reduce speed 20-30% | Visible parts, tight perpendicularity, low dross, or ISO 9013 Range 2 targets |
| Rust, mill scale, paint, or galvanized coating | Reduce speed 10-30% | Incoming material is not clean mill finish or coating burn-back is unacceptable |
| Many holes, corners, or small contours | Use 50-85% effective speed | Machine cannot reach programmed feed rate before decelerating again |
| Worn nozzle, dirty window, or focus drift | Reduce speed 5-15% | Dross increases, kerf widens, or cut quality changes during long runs |
Calculate cycle time and production capacity from cutting speeds
Determine optimal laser power for your material and thickness
Fine-tune cutting speed for quality vs productivity balance
Complete parameter reference by material type and thickness
Gas selection affects speed — nitrogen vs oxygen impact
ISO 9013 quality grades achieved at different cutting speeds
Speed differences between CO2 and fiber laser technologies
Calculate kerf width compensation for accurate cutting
Estimate cutting costs based on speed and material parameters
Data Disclaimer: This cutting speed data is compiled from mainstream laser equipment manufacturer technical documentation and industry standards, for reference only. Actual cutting parameters are affected by equipment model, material batch, environmental conditions, and other factors. Please refer to the equipment manufacturer's latest technical manual and on-site testing. Data last updated: 2026-02-01.