How thick a steel plate a laser welder can weld depends on several factors: laser power, laser beam diameter, material type, and welding speed.

Laser power: The greater the power of a laser welder, the stronger its welding ability. Generally speaking, a higher-power laser welder can weld thicker steel plates.

Laser beam diameter: The laser beam diameter determines the distribution of the energy density of the weld line. A smaller laser beam diameter means that the energy is concentrated in a smaller area, which increases the welding capacity. Therefore, a laser welder with a smaller laser beam diameter can weld thicker steel plates.

Material type: Different kinds of steel plates have different melting points and thermal conductivity. Generally speaking, laser welding is suitable for steel plates with higher melting points and better thermal conductivity. For special materials or special alloys, the parameters and techniques of the laser welder may need to be adjusted.

Welding speed: The welding speed is related to the moving speed of the welding machine. A fast welding speed may make it difficult to achieve sufficient welding depth. Therefore, welding quality and welding depth need to be considered when selecting welding speed.

In general, the thickness range of steel plates that can be welded by laser welding machines is usually between 0.1 mm and 10 mm. It should be noted that the actual welding capacity also depends on the performance and technical parameters of the specific equipment. Therefore, when choosing a laser welding machine, it is recommended to select the appropriate equipment according to the required welding thickness, and make reasonable settings according to the material and other requirements of the steel plate during operation.