What does one have to look out in material properties when changing material grade in cold sheet forming operation (example: from DC04 to DC03 or to DC01). Operation is mostly made of 90°bends and punching (16 mm parts).
Springback will mostly be controlled by yield strength. And because all three materials have the same minimum yield (140 Mpa), the only option is to bend samples. You could get identical results with all three materials. Also , your material supplier has poor process control ; notice DC 01 has a range of yield from 140 to 280 MPa. You need luck or a new material supplier.