Introduction
This updated 2025–2026 guide explains the real-world differences between 3kW, 6kW, 12kW and 20kW+ fibre laser cutters, using practical cutting capability and application data.
1. Maximum Material Thickness Higher power enables efficient cutting of thicker mild steel, stainless and aluminium. 2. Cutting Speed & Piercing Time Higher power dramatically reduces cycle times, especially in 6–20mm steel. 3. Gas Pressure & Flow Requirements
Note: Laser power is only part of the equation. Nozzle selection, focus position, gas pressure, beam quality, machine rigidity and software also have a major impact.
What Does Laser Power Actually Change?
Smaller fabrication shops Light engineering & thin sheet Replacing plasma for cleaner edges Lower running cost operations
Typical Cutting Scenario: Mild Steel: Up to ~12mm N₂, 20mm O₂ Stainless Steel: ~8mm N₂ Aluminium: ~6mm N₂ Copper/Brass: 3–4mm
Ideal Customer: Businesses whose workload is mostly 1–5mm sheet metal and want a clean, accurate, efficient and affordable fibre laser.
VECTOR Fibre Lasers (3–12kW)
General fabrication Subcontractors Mixed material cutting Frequent 10–18mm work Up to 20mm at capacity (lower quality cutting)
Typical Cutting Scenario:
Mild Steel: ~20mm N₂, 25mm O₂ Stainless Steel: ~12–15mm N₂ Aluminium: ~12mm N₂ Copper/Brass: ~6mm
6kW Fibre Laser – The Most Popular Vector Configuration
Ideal Customer: A versatile option for job shops and manufacturers needing the balance of speed, thickness capability and cost.
Medium-to-high volume production Multi-shift operations 6–20mm mild steel at higher speed High-speed stainless/aluminium cutting
Typical Cutting Scenario:
12kW Fibre Laser – The High-Speed Vector Production Machine
Mild Steel: 25mm+ N₂ Stainless Steel: ~20mm N₂ Aluminium: ~20mm N₂ Copper/Brass: 8–10mm
Ideal Customer: Companies wanting an upgrade from 6kW, with high throughput on mid-to-thick materials.
Heavy plate cutting 24/7 automated production Large manufacturers High-speed cutting of thick stainless & aluminium Clients needing the next level beyond 12kW
SENFENG Fibre Lasers (20kW+)
Typical Cutting Scenario:
Mild Steel: 30–50mm+ N₂ (machine dependent) Stainless Steel: ~30mm N₂ Aluminium: ~30mm N₂ Copper/Brass: 10–12mm
Ideal Customer: Fabricators requiring extreme speed on 8–20mm materials, or those cutting thick plate daily. Perfect when paired with Senfeng automation systems, such as load/unload towers and intelligent storage.
Which Power Should You Choose? (2025–2026 Quick Guide)
Air cutting is ideal for thin and medium-thickness mild steel, aluminium and galvanised sheet, making it a strong choice for general fabrication, signage, HVAC, agricultural equipment and high-volume part production. In many cases, air can even deliver faster cutting speeds than nitrogen on thin material while maintaining acceptable edge quality.
The key to successful air cutting is the quality of the compressor system. Fibre lasers require clean, dry, high-pressure air with stable flow rates. For this reason, Mantech supplies matched compressor packages built specifically for our Vector Fibre Lasers (3–12kW) and Senfeng high-power systems (20kW+), ensuring reliable performance and correct air delivery.
Air Cutting with Industrial Compressors (Cost-Effective Cutting in 2025–2026)
Air cutting is not recommended in scenarios where oxide-free edges, mirror finishes or high-end stainless components are required. However, for general production, it offers up to 90% lower operating cost, excellent cutting performance and a strong return on investment.
Looking at the Vector Fibre Laser range? use our cut parameter tool to work out your best option depending upon material and cut thickness
