![](/-/media/hardox-wearparts/images/ssab-cases/copter-blades-3.jpg?m=20190722092010)
![](/-/media/hardox-wearparts/images/ssab-cases/copter-blades-3.jpg?m=20190722092010)
Copter blades to polish concrete surface
Previous part material: SS400
Service life: 1-2 days
Hardness: 235 HB
Thickness: 4 mm
Improvement needs: longer service life
New material: Hardox® 450
Thickness: 4 mm
Service life: 3-4 days
Improved service life: 100%
New service life: 4 days
AR 400: 4 mm