A strap hinge (also a T-hinge when one leaf is short and the other is long, making a T shape) puts a long strap across the face of the gate. The longer arm spreads load over more of the gate frame, which suits timber-clad and pretty-side-out gates where bolts in the gate face are a feature, not a problem.
Strap hinges are common on rural and timber gates, less common on metal gates where weld-ons or butt hinges hide cleaner. Galvanised strap hinges typically run 300 to 600 mm long and bolt with M10 or M12 coach bolts.
If you need the gate to look like classical wrought iron, decorative strap hinges with scroll or fleur-de-lis ends are a stock option from heritage hardware suppliers.