Door ring forming with 1500 MPa 22MnB5 requires hot stamping —you can't cold form it. But for 980-1180 MPa DP/CP steels, cold forming on a servo press works. Our research shows that a 150ms dwell at BDC with 40 mm/s forming speed gives acceptable springback on 1180 MPa door ring geometry. The servo press is the enabler.