Sheet metal bend reduction

[s.worrall4]

I'm designing a couple of parts made of 2mm aluminium. I've never worked with sheet metal before.

My fabricator have said "2mm Aluminium has a bend reduction of 3.3mm on each 90 degree bend is this accounted for in your drawings?"

How do I tell Fusion 360 about the bend reduction that my fab have given me? Does it correspond to one of the items in the sheet metal rules? Or do I have to do some maths to recalculate the K factor?

FWIW I'm making bends of 80°, 90° and 100°.

[kellings]

k-factor is going to be where you set this in the rule. However, you are going to need to get the k-factor numbers from your vendor. k-factor is best calculated by doing bends and measuring the results on a simple test piece for each material type, thickness, and bend radius. So hopefully your vendor can supply you with their bend radii for their tooling and the needed k-factors.