A security safe that incorporates a cabinet (20) formed of sheetmetal, including a front (22) and a door jamb (30). A door (42) for the safe is also formed of sheetmetal and has a jamb stop (48), box section (50) with a front flange (52) into which a series of hinge knuckles (58) are formed. A continuous hinge leaf (60) is plug welded (62) to an inside surface of the cabinet front and a hinge pin (64) unites the knuckles to the hinge leaf. The cabinet door jamb hinge knuckles and hinge leaf extend continuously the full height of the door. The hinge combination is completely hidden within the cabinet forming a secure barrier, as no access to the hinge is provided from the outside, nor is it at all visible, even when the door is open. This arrangement forms a secure barrier preventing unauthorized entry and in the event the door is forcibly jimmied and bent inwardly, the hinge remains totally inaccessible. A second embodiment differs in that a complete separate continuous hinge is utilized, instead of the integral knuckles in the door front flange.