Will your stainless steel jewelry set off airport security?

Every November we get the same email, usually a day or two before someone flies home for the holidays: "Will my chain set off the metal detector?" Last year a customer in Halifax wrote to us from the airport, mid-line, asking if he should take off his Cuban chain and urn pendant before the scanner. That's a stressful spot to be in. So here's what we tell people, based on what our customers actually report back and what the TSA itself says about jewelry and alarms.

The short version: stainless steel can be detected, but small, light pieces rarely cause a problem. Heavy pieces sometimes do. And the body scanner most airports use now doesn't care what metal it is, only whether something is there.

Why stainless steel is sneakier than you'd think

Walk-through metal detectors look for metal that disturbs a magnetic field. Iron and plain steel do that easily. The 316L stainless steel we use at The Steel Shop is a different animal. It's an austenitic grade, which means it's mostly non-magnetic, and it's not a great electrical conductor compared with copper or aluminum. Even Garrett, one of the big metal detector manufacturers, points out that stainless is harder to pick up than most common metals.

Harder isn't impossible, though. What really matters is mass. A 3mm chain that weighs around 10 grams is a whisper to a detector. A 12mm Cuban that weighs 150 grams or more is a lot more metal sitting in one spot, and that's the kind of piece that gets flagged.

Then there's the millimeter-wave body scanner (the one where you stand with your arms up). It doesn't read metal at all. It shows the officer an outline of anything sitting on your body that isn't skin. Steel, gold, silicone, a phone you forgot in your pocket. If it's bulky, it shows up. That's why people who sailed through with a chain for years suddenly get a pat-down at a newer airport.

What usually goes through without a fuss

From what customers tell us, these almost never cause trouble:

• Thin chains in the 2mm to 5mm range. Our 3.5mm Cuban Link Chain is a good example. It's light enough that most people forget they're wearing it.
• Bands and simple rings. A 6mm steel band has very little mass. Leave it on.
• Leather and bead bracelets. The only metal on a leather bracelet is the clasp, often under 5 grams.
• Single dog tags. One tag on a thin ball chain is fine nearly every time.

Studs and small hoops are fine too. Honestly, we've never had a customer report an earring problem.

What we'd take off before the line

Here's our opinion, and it's a firm one. If you're wearing a stack, take the heavy stuff off and put it in your carry-on before you reach the bins. Not the checked bag. Never the checked bag. The TSA's own jewelry page says to keep valuables with you, and we agree. We've had more than one customer lose a bracelet to a suitcase that went to Vancouver while they went to Toronto.

The pieces we'd remove:

• Cuban chains 10mm and wider, and anything over roughly 80 grams
• Stacks of three or more metal bracelets on one wrist
• Chunky ID bracelets with a wide plate
• Belt buckles, obviously (not ours, but people forget)

One thing we don't recommend: tossing loose jewelry straight into the plastic bin. Chains slip through the gaps, clasps snag on the rollers, and you're grabbing things in a rush on the other side. Put it in a small zip pouch or a sock, then into your bag. Takes ten seconds. Saves the panic.

Urn jewelry and ashes: the one people worry about most

This is the question that comes with the most emotion attached, so we'll be careful and honest. A small urn pendant or urn bracelet holds a tiny amount, usually a fraction of a gram. It's sealed with a screw closure. In our experience it's treated like any other small pendant, and customers wear pieces like the Matte Urn Dog Tag on flights all the time.

That said, a few things are worth knowing:

• The TSA's guidance on cremated remains is written for full containers, and it's strict: officers won't open a container, even if you ask, and anything they can't see into may be refused. That rule is about urns in your bag, not a small sealed pendant, but it tells you how seriously they take it.
• If an officer wants a closer look at your pendant, let them. Don't unscrew it. Most of the time a quick visual check is all that happens.
• If you're flying with a full-size urn as well, that's a separate conversation with your airline before the trip. Some airlines don't allow remains in checked bags at all.

We'd rather you wear the piece than pack it. If it's in a bag and the bag gets lost, that's not something you can replace. You'll find our full range in the memorial collection.

Medical ID bracelets

Keep it on. A medical bracelet is exactly the kind of thing you want on your wrist if something happens mid-flight. The steel plate on our men's medical bracelets is small, and if it does get noticed, just tell the officer what it is. Nobody's going to make you take off a medical ID.

Packing the pieces you take off

Once the heavy stuff is off, the next problem is tangling. A chain thrown loose into a toiletry bag will knot itself around a charger cable by the time you land. We see the aftermath in our repair emails every January.

What works for us when we travel to trade shows:

• One chain per bag. Small zip bags cost almost nothing. Close the clasp first, then lay the chain flat inside and press the air out.
• Thread fine chains through a straw. Cut a drinking straw to half the chain length, feed the chain through, clasp it. It can't knot.
• Keep bracelets apart from chains. A Cuban bracelet rubbing against a polished chain for a five-hour flight can leave fine scuffs on both.
• Don't store damp pieces. If you swam the day before, dry everything with a soft cloth first. 316L won't rust, but trapped moisture leaves a dull film that takes a cleaning to remove.

And a small warning. Hotel safes are fine, but the bedside table is where most travel jewelry gets lost. If it's not on you, it's in the safe or zipped in your bag. Pick one spot and use it every time.

If you do get pulled aside

It happens. It's not a big deal. Here's what usually follows:

1. The officer asks if you have anything on you. Say "a steel chain" or "a bracelet". Be specific.
2. They'll do a quick pat-down of the area the scanner flagged, often just your neck or wrist.
3. You can ask for a private screening if you'd prefer. The TSA allows that.

Total time, usually under two minutes. The worst part is the people behind you sighing.

Our recommendation

Wear what's light, pack what's heavy, and keep anything sentimental on your body or in your carry-on. If you're picking a chain mostly for travel and everyday wear, we'd point you to something between 3mm and 5mm in our Cuban link chains. It looks good, it won't snag, and in our experience it almost never stops you at the scanner. Save the 12mm for the wedding. You'll thank us at the gate.