Metal Laser Cutting Machines | High-Precision Solutions by Tianchen

Thick metal plate laser cutting refers to the processing of materials typically ranging from 10mm to over 30mm in thickness. This demanding application requires high laser power (often 6kW and above), optimized optics, and precise control of cutting parameters to achieve full penetration and a acceptable cut quality. The primary challenges include managing the immense heat input to avoid excessive HAZ and controlling the flow of molten metal through the deep kerf to prevent dross adhesion. For thick carbon steel, oxygen is used as the assist gas to support an exothermic reaction that boosts cutting speed and helps eject molten material. For stainless steel and aluminum, high-pressure nitrogen is used to create clean, oxide-free cuts. Despite the challenges, laser cutting offers significant advantages over plasma or flame cutting for thick plates, including a narrower kerf (less material waste), superior dimensional accuracy, and the ability to produce complex contours without tool wear. It is commonly used in the construction of heavy machinery, shipbuilding, and structural steel fabrication. The achievable edge squareness and surface roughness are dependent on material thickness and laser power. For specific information on cutting thick plates for your project, including maximum capacities and sample quality, please contact us with your material details.