The slag does not stick to the copper as well as to steel. Copper slats can be cleaned at greater intervals and the build-up comes off easier.
Copper slats last six to eight times longer than steel. Rather than interrupting production to change a steel bed every two months copper slat beds can last over a year. Longer times between cleanings as well as shorter cleaning times lead to less down time. Spend more time cutting and making parts with copper slats.
Part quality is improved as there is less accumulating material under the part being cut to bounce the beam and damage the bottom side of the material. Large amount of slag between the slats will interfere with the forks that lift the finished parts on machines equipped with automation. This causes production to be stopped to remove the slag.
Copper is ideal as a slat material because of its high thermal conductivity and melt point. When molten kerf material or hot particles impact the slat they will cool before they give off enough heat to melt the surface of the copper and not stick.