Gas Economics Engineering Whitepaper

High-Pressure Air Cutting Economics & Cutting Parameters Matrix (10kW–30kW)

Assist gas represents up to 45% of total operating expenses in high-power fiber laser cutting. With modern 10kW to 30kW fiber lasers, high-pressure 4-stage screw compressed air (16 to 20 Bar, dew point ≤ -40°C) cuts medium carbon steel and stainless steel 2x to 3x faster than oxygen, cutting hourly gas expenditure by up to 75%.

1. Hourly Operating Cost Comparison: Air vs. Liquid Nitrogen vs. Oxygen

Assist Gas Type	Pressure & Flow Rate	Hourly Gas Cost ($/Hour)	Cutting Speed Multiplier (12mm Carbon Steel)
High-Pressure Air (4-in-1 Screw)	18 Bar / 2.2 m³/min	$2.80 / hr (Electrical Cost Only)	2.8x vs. Oxygen (Fastest Productivity)
Liquid Nitrogen (Dewar / Bulk Tank)	18 Bar / 45 m³/hr	$18.50 – $24.00 / hr	2.2x vs. Oxygen (Bright Edge)
Bottled Liquid Oxygen	0.8 Bar / 12 m³/hr	$6.50 – $9.20 / hr	1.0x (Baseline Speed)

2. Clean Air Requirement Standards for Laser Optics

Operating air cutting without specialized 4-stage oil-water separators (residual oil content ≤0.003 mg/m³) will cause instant contamination of optical protective windows. ACTCNC integrates industrial air booster stations engineered specifically for Raytools and Precitec cutting heads.