SIENDE

BENDING OF HARDOX

Bending
The results of a bending operation depend on the sheet metal, the tools and the execution.

Steel type
Note that bending strength and rebounding increase with the strength of the sheet metal. This means that the stronger and harder the sheet, the greater the required bending forces, punch radius and die widths and the stronger the rebound.

Sheet metal surface
Our recommendations refer to blasted and rust-treated sheet metal. Untreated sheet metal can be bent somewhat more tightly. Surface defects and rust on the sheet side, which is stretched during bending, can lead to a considerable reduction of flexibility. In critical cases such defects must be abraded.

Sheet metal edges
Cutting and burning edges must be cleaned with a sanding machine.

Sheet thickness
Thinner sheets generally allow lower bending rates.

Rolling direction of the sheet
Bending lines that transverse to the rolling direction can be bent more closely than those along the rolling direction.

Bending length
If the bending length is less than ten times the thickness of the sheet, narrower bending agents can be achieved.

Recommendations for bending

Material Thickness (mm)

Rectangular R/t
Along R/t
Rectangular W/t
Along W/t
Suspension (o)
S355 to EN10025
2.5
3 7.5
8.5
3-5
Hardox 400
t < 8
8 > t < 20
T > 20
2.5
3.0
4.5
3.0
4.0
6.0
8.5
10.0
12.0
10.0
10.0
12.0
9-13
Hardox 450
t < 8
8 > t < 20
T > 20
3.5
4.0
5.0
4.0
5.0
6.0
10.0
10.0
12.0
10.0
12.0
14.0
11-18
Hardox 500
t < 8
8 > t < 20
T > 20
4.0
5.0
7.0
5.0
6.0
8.0
10.0
12.0
16.0
12.0
14.0
18.0
12-20
X
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