What is mixed gas laser cutting and how does it work?

Gaz mixte laser cutting uses a precision blend of nitrogen (N₂) and oxygen (O₂) — typically 95% N₂ and 5% O₂ — as the auxiliary gas. This micro-oxygen mixture accelerates the cutting speed dramatically compared to pure oxygen or nitrogen, while producing clean, burr-free edges on carbon steel.

How much faster is mixed gas compared to pure oxygen cutting?

Gaz mixte cutting is 2.5× to 7× faster than pure oxygen cutting depending on material thickness. For example: 6mm carbon steel cuts at ~18 m/min with mixed gas vs ~2.5 m/min with pure O₂. 20mm carbon steel cuts at ~3-4 m/min vs ~1.1-1.5 m/min with O₂.

What laser power levels are supported by the LISHI LASER Dispositif à Gaz Mixte?

The device supports laser machines from 3kW to 60kW. 3kW handles up to 16mm carbon steel, 20KW up to 25mm, 30KW up to 30mm, 40KW up to 35mm, and 60KW up to 45mm carbon steel. It is compatible with all major laser brands including HAN'S, DNE, PENTA, LEAD, HSG, BODOR, JIATAI, HG LASER, and XUNLEI.

Does mixed gas eliminate burrs in laser cutting?

Yes. Gaz mixte cutting produces zero burrs on carbon steel, compared to pure oxygen cutting which often leaves oxidized edges requiring secondary deburring. The N₂/O₂ ratio prevents excessive oxidation during the cutting process.

How much nitrogen can be saved by using mixed gas instead of pure N₂?

Gaz mixte is designed for speed and cut quality. The small oxygen percentage (typically 5%) enables micro-oxygen cutting that delivers burr-free edges and 3× faster speeds on carbon steel. The device consumes only 2 kWh per 24 hours — near-zero electricity cost.

What is the gas consumption and power requirement of the mixed gas device?

The LISHI LASER Dispositif à Gaz Mixte has an input pressure requirement of 20–25 bar from liquid N₂ and O₂ storage tanks, with output pressure of 12–16 bar to the laser machine. Maximum flow rate is 200 m³/h. Power consumption is only 2 kWh per 24 hours — essentially maintenance-free.

Can one mixed gas device supply two laser machines simultaneously?

Yes. LISHI LASER is the only manufacturer offering a stable one-to-three configuration. One mixing station can simultaneously supply two laser machines of different power levels (e.g., one 3kW and one 20kW) with stable gas mixing ratios.

What materials can be cut with mixed gas?

Gaz mixte is primarily used for carbon steel cutting where it delivers the best speed and quality. It also works well for stainless steel and aluminum. For aluminum specifically, mixed gas produces clean, burr-free edges on sheets from 1mm to 4mm+ thickness.

20kW Laser Paramètres de Découpe | Gaz Mixte vs O2 Speed Data

Technical Data

20kW Laser Paramètres de Découpe & Gas Speed Data

Carbon steel cutting speed parameters: 3kW to 60kW. Compare mixed gas vs oxygen cutting speeds. Data from real end user deployments. Also applies to aluminum and thick plate cutting optimization.

3KW Best for ≤2mm Carbon Steel (Thin Plate)

Thickness	Mixed Gas Speed	Gas Pressure	Nozzle
1mm	28–35 m/min	10 bar	1.5S
2mm	16–20 m/min	10 bar	2.0S

Note: 3KW parameters based on RFL-3000 (50μm fiber) with N₂/O₂ mixed gas. Thin plate high-speed cutting — ideal for sheet metal shops.

6KW Best for ≤6mm Carbon Steel

Thickness	Mixed Gas Speed	Gas Pressure	Nozzle
1mm	35–45 m/min	12 bar	1.5S
2mm	20–25 m/min	12 bar	2.0S
3mm	12–14 m/min	14 bar	2.0S
4mm	8–10 m/min	14 bar	2.0S
5mm	6–7 m/min	16 bar	3.0S
6mm	5–6 m/min	16 bar	3.5S

Note: 6KW parameters based on RFL-6000 (100μm fiber) with N₂/O₂ mixed gas. Contact us for O₂ comparison data at this power level.

12KW Best for ≤16mm Carbon Steel

Épaisseur	O₂ Speed	Vitesse Gaz Mixte	Amélioration Vitesse
6mm	~2.5 m/min	~18 m/min	~7× faster
10mm	1.8–2.3 m/min	4.5–5 m/min	~2.5× faster
12mm	~1.8 m/min	~4 m/min	~2.2× faster
16mm	1.4–1.8 m/min	3–4 m/min	~2.2× faster

20KW Best for ≤25mm Carbon Steel

Épaisseur	O₂ Speed	Vitesse Gaz Mixte	Amélioration Vitesse
2mm	—	22 m/min	Use mixed gas (not N₂)
6mm	2.6–3.0 m/min	18 m/min	~6× faster
8mm	2.3–2.5 m/min	16 m/min	~7× faster
10mm	2.0–2.2 m/min	12–14 m/min	~6× faster
12mm	1.8–2.0 m/min	10–12 m/min	~6× faster
14mm	1.6–1.8 m/min	9.5 m/min	~5.5× faster
16mm	1.5–1.6 m/min	5–6 m/min	~3.5× faster
20mm	1.1–1.5 m/min	3–4 m/min	~2.5× faster
25mm	0.9–1.2 m/min	2.5–3 m/min	~2.5× faster

30KW Best for ≤30mm Carbon Steel

Épaisseur	Vitesse Gaz Mixte	Lieu du Test	Notes
8mm	16 m/min	Taiwan site	Extremely clean cut
10mm	~12 m/min	Field test	—
12mm	9.3 m/min	Taiwan site	No burrs confirmed
16mm	~8 m/min	Taiwan site	—
20mm	5.6 m/min	Taiwan site	PENTA end user
25mm	~3.5 m/min	Field test	—
30mm	Contact	—	Contact for detailed params

40KW Best for ≤35mm Carbon Steel

Épaisseur	Estimated Vitesse Gaz Mixte	Notes
20mm	~10 m/min	—
25mm	~6 m/min	—
30mm	~4 m/min	—
35mm	~2.5 m/min	—

Note: 40KW parameters based on field data from PENTA end users and Foshan factory tests. Contact us for confirmed data.

60KW Best for ≤45mm Carbon Steel

Épaisseur	Estimated Vitesse Gaz Mixte	Notes
25mm	~10 m/min	—
30mm	~7 m/min	—
40mm	~3.5 m/min	—
45mm	~2 m/min	—

Note: 60KW parameters are estimates based on power scaling from 30KW/40KW data. Contact us for confirmed test results and specific use cases.

Consommation de Gaz

Why Gaz Mixte Wins on Economy

Gas Pressure & Flow Specifications

Parameter	Value	Notes
Input Pressure (N₂ & O₂)	20–25 bar	From liquid storage tanks
Output Pressure	12–16 bar	To laser cutting machine
Max Flow Rate	200 m³/h	At full load
Output N₂ Purity	~95%	Micro-oxygen mixed gas
Gas Ratio	N₂ 95% / O₂ 5%	Adjustable for different materials
Power Consumption	2 kWh / 24 hours	Extremely energy efficient

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