Industrial Steel Cutting Machine | High-Precision & Automated

Laser cutting of GI (galvanized iron) sheet is a precise and efficient process, but it requires specialized knowledge and machine configuration to address the unique challenges posed by the material's zinc coating. Galvanized sheets are steel sheets coated with a layer of zinc to provide exceptional corrosion resistance, a property that makes them indispensable in the construction, HVAC, automotive, and appliance industries. When processing GI sheets with a fiber laser, the primary objective is to achieve a clean, high-quality cut while minimizing damage to the protective zinc layer adjacent to the cut edge. The use of high-power fiber lasers with nitrogen as an assist gas is the industry standard for this application. Nitrogen creates an inert atmosphere at the cut zone, which effectively prevents the oxidation of the steel and, more importantly, limits the burning or vaporization of the zinc coating. This results in a clean, bright cut edge with a minimal heat-affected zone (HAZ) and preserved corrosion resistance. The precise, non-contact nature of laser cutting also eliminates the risk of chipping or peeling the coating that can occur with mechanical shearing or punching. This technology allows for the creation of intricate, high-quality parts for ductwork, roofing panels, electrical enclosures, and vehicle body panels with high throughput and minimal post-processing. For manufacturers who regularly work with coated materials, optimizing laser parameters for GI sheet is essential. To learn more about the best practices and machine configurations for your specific GI sheet cutting applications, please do not hesitate to contact our application engineering team for expert advice and support.