What is the main difference between weld-on and bolt-on gate hinges?

Weld-on hinges are permanently welded to the gate frame and post, creating a high-strength connection that cannot be removed without cutting. Bolt-on hinges use bolts and nuts for attachment, allowing the gate to be removed for maintenance. Weld-on hinges are preferred for heavy-duty steel gates (500kg+) and high-security applications. Bolt-on hinges are preferred for gates that need to be removed periodically.

When should I use weld-on hinges instead of bolt-on hinges?

Use weld-on hinges when: the gate is heavy (over 200kg per leaf); the gate is for high-security or commercial applications; the gate frame is steel tube or flat bar; the gate will not need to be removed regularly. Use bolt-on hinges when: the gate needs to be removed for maintenance; the post is masonry, timber, or aluminium (cannot be welded); the installation requires adjustability after fitting.

What load capacity do weld-on gate hinges support?

HST's bearing weld-on hinges (BH1+BH2, BH7) support gates up to 300–500 kg per pair. Heavy-duty flag hinges (H2-66×100, H2-200×140) are rated for gates up to 800 kg per pair. For gates exceeding 800 kg, use 3 or 4 hinges per gate leaf.

Weld-On vs Bolt-On Gate Hinges: Which Is Right for Your Project?

The choice between weld-on and bolt-on gate hinges affects installation time, load capacity, and long-term maintenance. This guide explains the key differences and helps you choose the right hinge for each application.

Published: 2026-06-05 · 7 min read

Introduction: Why Hinge Selection Matters

Gate hinges are among the most mechanically stressed components in any gate system. They bear the full weight of the gate leaf, absorb wind and impact loads, and must operate reliably for decades with minimal maintenance. Choosing the wrong hinge type leads to gate sag, binding, premature wear, and in extreme cases, complete hinge failure.

For steel gate fabricators, the choice between weld-on hinges and bolt-on hinges is one of the first decisions to make in any gate project.

What Are Weld-On Gate Hinges?

Weld-on hinges (also called weldable hinges or weld hinges) are designed to be permanently attached to the gate frame and post by welding. The hinge plates are welded directly to the steel tube or flat bar of the gate frame, creating a connection that is as strong as the base material itself.

Weld-on hinges are available in several styles: flag hinges (H2-66x100, H2-200x140) for heavy-duty commercial and farm gates; bearing weld-on hinges (BH1+BH2, BH7) for smooth residential operation; and combination weld-on/bolt-on hinges (H3-83x104) that allow gate removal without cutting.

What Are Bolt-On Gate Hinges?

Bolt-on hinges are attached using bolts rather than welding. They are used for timber gate frames, aluminium gates, retrofit applications, and where the gate must be removable.

Key Differences

Weld-on hinges provide the highest connection strength (rated up to 800 kg per pair for the H2-200x140), are permanent, and require welding equipment. Bolt-on hinges are easier to install with basic tools, allow gate removal, but have lower load capacity (typically up to 400 kg per pair) and are better suited to timber and aluminium frames.

When to Use Weld-On Hinges

Choose weld-on hinges for: heavy steel gates over 200 kg per leaf; high-security applications where the hinge cannot be removed without cutting; commercial and industrial gates; and permanent installations.

When to Use Bolt-On Hinges

Choose bolt-on hinges for: timber gates and posts; aluminium gates; retrofit and repair work; and removable gates.

Corrosion Protection After Welding

When welding galvanized or powder-coated hinges, the heat burns away the surface treatment in the weld zone. Restore protection by applying cold galvanizing compound immediately after welding, or re-galvanize the complete assembly if the schedule allows.

HST supplies weld-on hinges in HDG, powder coat, and zinc electroplated finishes. View our full weld-on hinge range or contact our sales team for wholesale pricing.