Weld-on gate hinges are permanently welded to steel gate frames, providing the strongest possible connection for heavy gates. This guide explains the types, load ratings, and how to specify the right hinge.
What Are Weld-On Gate Hinges?
Weld-on gate hinges are hinges that are permanently attached to a steel gate frame and post by welding. Unlike bolt-on hinges, which are fastened with bolts through pre-drilled holes, weld-on hinges are fused directly to the steel using MIG or stick welding. The result is a continuous metallic bond that is stronger than any bolted connection of equivalent size.
Weld-on hinges are the standard choice for heavy steel gates, industrial gates, and any application where maximum strength and permanent attachment are required.
Types of Weld-On Gate Hinges
Plain (Flat Plate) Weld-On Hinges
The simplest design: two flat steel plates joined by a pin. Suitable for light to medium gates (up to 150 kg). Easy to weld and widely available. The pin may be fixed or removable for gate removal.
Bearing Weld-On Hinges
Incorporate ball bearings or plain bearings around the pin for smooth, low-friction rotation. Recommended for gates that open and close frequently, as bearings significantly extend service life by reducing wear on the pin and barrel. HST's bearing weld-on hinges use sealed ball bearings for outdoor use.
Heavy-Duty Weld-On Hinges
Constructed from thicker steel plate (8–12 mm) with larger pin diameters for gates above 200 kg. Commonly used on industrial yard gates, warehouse entrances, and security perimeter gates.
Adjustable Weld-On Hinges
Include a threaded adjustment mechanism that allows height or angle correction after the hinge is welded. Useful on sites where the post may settle slightly, or where precise gate alignment is required after installation.
Load Ratings
| Hinge Category | Gate Weight per Pair | Typical Application |
|---|
| Light duty | Up to 80 kg | Garden gates, pedestrian gates |
| Medium duty | 80–200 kg | Residential driveway gates |
| Heavy duty | 200–500 kg | Commercial, industrial gates |
| Extra heavy duty | 500 kg+ | Security gates, factory entrances |
Surface Finishes
HST's weld-on hinges are available in four finishes:
- Zinc electroplating — standard, suitable for sheltered or inland locations
- Hot-dip galvanizing (HDG) — maximum corrosion resistance for coastal or exposed sites
- Powder coating — available in black, grey, or custom RAL colours
- Self-colour (bare steel) — for projects where the fabricator will apply their own finish
How to Choose the Right Weld-On Hinge
- Calculate gate weight and select hinges rated for at least 1.5× that weight per pair.
- Choose bearing vs plain pin based on cycle frequency.
- Select surface finish based on environment (coastal = HDG).
- Decide on adjustability — standard or adjustable.
- Confirm weld compatibility — Q235 steel welds with standard MIG/stick equipment.
HST supplies weld-on gate hinges wholesale to distributors and contractors in 30+ countries. View our weld-on hinge range or request a wholesale quote.