Cutting steel slab

Choosing the most effective method for cutting steel plates depends on several factors, including the application, required speed, and the thickness of the steel plates or sheet metal. Here’s a breakdown of the four primary methods for cutting steel plates on a CNC machine:

1. Oxy-Fuel Cutting:
   • Suitable for cutting thick steel plates, ranging from 91.44-121.92 centimeters (36-48 inches) thick.
   • Works well for thicknesses exceeding 2.54 centimeters (1 inch) and as thin as 6.35 millimeters (1/4 inch).
   • Relatively slow process but can be enhanced with multiple torches for increased productivity.
   • Produces smooth, straight metal surfaces, ideal for applications not requiring further processing.
2. Plasma Arc Cutting:
   • Faster than oxy-fuel cutting, suitable for plate thicknesses of 6.35-38.1 millimeters (1/4-1.5 inches).
   • Edge quality slightly lower than oxy-fuel cutting, but smoothness and slag performance remain good.
   • Requires relatively expensive equipment but offers improved productivity.
   • Multiple plasma torches can be used simultaneously for cutting, depending on the volume of steel plate cutting.
3. Laser Cutting:
   • Best suited for cutting mild steel up to 3.175 centimeters (1.25 inches) thick, with precision and accuracy.
   • Slower process but offers precise contours and accurate small holes.
   • Provides very good edge quality with sharp square edges and minimal slag.
   • Highly reliable with long service life and automation capabilities, allowing for “lights out” operation.
4. Water Jet Cutting:
   • Ensures smoothness and precision, with edge quality that can exceed laser cutting.
   • No thickness limitation, practical up to 15.24-20.32 centimeters (6-8 inches) thickness.
   • Suitable for cutting with multiple cutting heads, although additional heads increase operating costs.
   • Higher initial equipment cost compared to plasma but lower than laser, with higher operating costs due to abrasive usage.

To choose the best steel plate cutting method for your application, consider factors such as thickness requirements, desired edge quality, speed, equipment cost, and operating expenses. Each method has its advantages and limitations, so evaluating these factors will help determine the most suitable option for your specific needs.