Plasma Cutting Stainless Steel: 10 FAQ Answered By Experts- stainless steel plate laser cutting ,In general, cutting speeds for stainless steel are lower than they are for mild steel at a given thickness and cutting current. As an example, the Hypertherm XPR300 will cut 12mm mild steel at nearly 3 meters per minute (quality = 1), whereas it would cut stainless steel at …Laser cutting - WikipediaWhere: = steel sheet thickness in mm; = laser power in kW (some new laser cutters have laser power of 4 kW); = cutting speed in meters per minute. This process is capable of holding quite close tolerances, often to within 0.001 inch (0.025 mm).Part geometry and the mechanical soundness of the machine have much to do with tolerance capabilities.