Close-up views of damaged industrial metal parts: the left shows a large cracked weld on a joint, and the right shows a rusted, worn cylinder with a thick, deteriorated black coating.

Welding requires some serious skill and attention to detail. When done properly, it creates strong, reliable connections that help hold together everything from cars and trucks to the buildings that tower above us. When corners are cut, however, even a small mistake can lead to results that range from laughably bad to truly dangerous.

Some reveal obvious shortcuts, others are failed tests, and a few will leave you wondering what the person responsible was thinking. While many of these mistakes are amusing in hindsight, they also serve as reminders that poor workmanship can have consequences far beyond an embarrassing photo.

1. Sometimes you can lie on a resume; sometimes you can’t

Two side-by-side images show metal pieces with welding seams; the left weld appears uneven and messy. A caption reads, "New guy failed a simple weld test but he thought he bagged the job." Welding gloves are visible in the background.
u/smackedwitharuler/via reddit

2. It’s about quality, not quantity

Close-up of a metal surface showing a rough weld seam. The weld is surrounded by a partially smoothed area on the left, with visible grinding marks. The background features an industrial setting with blurred tools and equipment.
via reddit

3. Well, we’ve definitely seen better attempts in the welding world

Close-up image of a metal structure showing a welded seam. The weld is slightly uneven with discoloration, transitioning from blue to yellow and silver hues. The background reveals parts of the metal frame with an industrial appearance.
u/jabberwocky918/via reddit

4. You should probably get your money back

Close-up of a vehicle's undercarriage showing a cracked metal bracket and a worn tire. The image highlights visible damage to the metal, with surrounding mechanical parts in the background.
u/silanu/via reddit

If your brain is already hurting from these welding fails, then you’re not alone.

5. Yeah, that isn’t going to work

Close-up of a welding joint on a metal frame with visible weld beads. The metal appears aged with some rust. The background features a speckled, tiled floor.
u/yarcek/via reddit

6. Someone is losing their job today

Close-up of a shiny, metallic pipe joint with visible welding marks. The metal surfaces have a textured appearance, reflecting light in certain areas. The joint is slightly corroded, showing signs of wear.
u/yachtguru/via reddit

7. This crater pit is caused by ending a weld too abruptly; this fell off while this man was riding

A hand holding a small, rectangular metal part in front of a Yamaha dirt bike's rear wheel. The bike's chain and tire are visible, along with the garage floor.
u/creadgsxrguy/via reddit

8. This weld failed on an elliptical; this could have ended in serious injury

Close-up of a black metal surface with a visible crack running through it. The image shows the texture and detail of the surface, highlighting the irregularity where the crack is located.
u/dmed24/via reddit

9. Why wouldn’t you weld it all the way?

Close-up of a pale yellow metal bracket with welded seams. The structure includes angular cuts and is bolted to a rectangular base. The metal has a smooth finish, and the background shows a concrete floor and blurred objects.
u/wolf8398/via reddit

10. And the mechanic only charged you $100; what a steal

A close-up of a metal pipe with a welded joint. The welding is uneven with visible slag and discoloration on the surface. The pipe appears to be part of a mechanical or automotive system, surrounded by other metal components.
via reddit

11. “We were wondering why the truck crane failed.”

A close-up of a rusted metal pipe wrapped with black insulation material. The pipe shows signs of wear and deterioration. The background is blurred, showing a concrete building and some greenery.
u/madsci/via reddit

12. This guy said he was a certified field welder; should they take his word for it?

Close-up of a metal corner with a bumpy, irregular weld. The weld appears rough and uneven, with visible welding spatter and some markings on the metal surface around it.
u/newbfollowape/via reddit

13. Nothing like paying $2000 for a custom exhaust pipe and finding this after one ride

A close-up of a metal pipe with a large crack, showing discoloration from heat. The pipe is part of a larger mechanical assembly, with a blue component visible in the background.
u/electrical_review_81/via reddit

14. This is what happens when a carpenter swears he can weld

Close-up of a frayed and damaged electrical cable with exposed wires. In the background, a workbench with red cloth, pliers, and various tools is visible. The setting appears to be a workshop.
via reddit

15. It’s time to try a different profession

A metal piece displaying a welded seam runs horizontally across the center. The surface has visible weld marks and irregularities. The piece is positioned upright on a surface, with letters and numbers marked in paint on the side.
u/_-_bread_-_/via reddit

16. It looks like this guy dipped the rods in a bucket of water before he started

Close-up of metal components with rough edges and weld marks. The top piece is flipped to show both sides of the weld joint. A red work glove is visible in the background. The surface beneath the components is dark and textured.
via reddit

17. How not to repair a failed sub arc weld. Just keep laying welds down, it’ll be fine

Close-up of a metal surface featuring a freshly welded seam with visible ripples and texture. The weld is situated along the center of the surface, reflecting light with subtle iridescence. The background shows a dim workshop setting.
u/kuulkatta/via reddit

18. When the wire burns through the backing strip, that’s an instant failed test

A close-up of a metal welding project showing three intersecting metal beams. The welds are visible, with some discoloration around the joints. The background includes industrial equipment and a blue-tinted curtain.
u/localnative141/via reddit

19. Someone’s going to need to patch that one up

A close-up of a metal pipe with a large crack at the welded joint, showing discoloration from heat treatment. The background is a rusty, textured surface, suggesting industrial or workshop surroundings.
u/clutchkickin/via reddit

20. If the weld test ends like this, they aren’t a good welder

A close-up of a red metal structure, where a square plate is welded to a curved pipe. The joint shows rough welding marks and is slightly off-center. The structure is surrounded by shelves and materials in what appears to be a workshop.
u/sirnanigans/via reddit

Want to see more fails?

Check out 20 Construction Fails That Cost the Customers Big, or take a look at 20 Fails That Sum Up the Life of Mechanics. Finally, if you want to see home renovation fails, check out 20 Home Renovation Fails That Cost Homeowners Big.

Meet the Writer

Patrick is a writer based in upstate New York, where he grew up and still calls home. Over the past year, he’s been diving deep into storytelling, especially tales rooted in history, the Wild West, lost treasures, and ancient artifacts. He’s also drawn to unsolved mysteries and whatever the internet can’t stop talking about.

Whether it’s a centuries-old legend or a bizarre internet rabbit hole, Patrick is always chasing the threads of a compelling story. When he’s not chasing stories, Pat’s probably hiking mountain trails with his dog, exploring new corners of the U.S., or doom-scrolling between hangouts with friends and family. He finds inspiration in nature, forgotten places, and random conversations—anything that sparks curiosity. Whether it’s city streets or backcountry paths, Patrick’s always on the lookout for the next great story.