Can I Weld A Padlock To A Chain?

It’s a common problem. A padlock gets left on the ground, misplaced or goes missing entirely when multiple people share access to a gate, storage locker or equipment area. Even when theft isn’t intentional, simply forgetting to re-attach a padlock can result in it being lost. In these situations, many people look for a way to secure the padlock permanently to the gate or chain so it cannot be removed.

Why Use A Retaining Chain?

A retaining chain allows the padlock to remain physically attached to a gate, fence post, chain or storage unit at all times. The padlock can still be opened and used normally, but it can’t be walked off with. This is particularly useful in shared-access environments where several people come and go throughout the day.

The important note here is that the retaining chain is not designed to provide additional security against cutting or forced entry. Its sole purpose is to stop the padlock being lost or removed accidentally.

Can The Padlock Be Permanently Welded To A Chain?

Yes, but it must be done carefully. The correct method is to weld a short length of lightweight chain to the gate or fitting itself, not directly to the lock body. Direct welding onto the padlock can damage the internal locking mechanism due to heat transfer.
Instead:

Attach one end of the chain securely to the gate or post (welded).
Thread the other end of the chain through the eye of the padlock or its shackle while unlocked.
Close the padlock as normal when securing the gate.

This allows the padlock to function as intended, without exposing it to heat damage. See below:

What Chain Should Be Used?

The chain does not need to be high security — the intention is retention, not reinforcement. A standard mild steel chain is sufficient in most cases. The key is that it cannot be pulled free without tools.

If you require both retention and high security (for example on commercial sites), you may want to use:

A hardened security chain for the actual locking point
A lower-cost chain welded for retention

This ensures the retaining chain can be thin enough to weld safely, while the security chain provides break-resistance.

When Is This Most Useful?

This approach works extremely well for:

Community gates and sports facilities
Construction site access gates
Shared garden or allotment entrances
Storage containers with rotating users
Boat club or marina access points

Anywhere multiple trusted users share one locking point, retaining the padlock avoids inconvenience and replacement costs.