Aluminum Welding Chicago & DuPage | American Welding

Aluminum is harder to weld than steel; it pulls heat away fast, hides dirt and oxide, and warps if you look at it wrong, but harder isn't the same as impossible.

We have been welding aluminum since 1980, and very little of it has come through the shop that couldn't be saved. American Welding provides aluminum welding service across Chicago and the suburbs:

All backed by a workmanship guarantee.

Can Aluminum Be Welded?

Yes, it can be welded. The idea that it can't usually come from a bad experience: someone tried, the weld cracked or wouldn't take, and they assumed the metal was the problem.

The metal wasn't the problem. The setup was.

Aluminum needs the right process, the right filler rod, clean preparation, and a welder who understands how the metal behaves. Get those right, and aluminum welds up strong and clean. Get them wrong, and it fights you the whole way.

Why Aluminum Is Harder to Weld — And How It's Done Right

None of this makes aluminum impossible. It just makes it unforgiving, which is why it should go to someone who welds it often.

How Many Types of Welding Are There?

There are more than 30 recognized welding processes, but most everyday work comes down to four:

1. MIG welding

Fast and beginner-friendly; good for steel and thicker aluminum

1. TIG welding

Slow, clean, and precise; best for thin metal, aluminum, and visible welds

1. Stick welding

Rugged and portable; good for thick steel and outdoor jobs

1. Flux-cored welding

Similar to MIG, but better suited to dirty metal and outdoor conditions

The rest are specialized processes used mostly in manufacturing and industry.

For aluminum repair and fabrication, TIG and MIG are the two that matter, and choosing between them is the next question.

What Type of Welding Is Best for Aluminum?

Two processes handle aluminum well, and the right one depends on the job:

• TIG welding is the best choice for thin aluminum, visible welds, and precision repairs. Clean, controlled, and precise. Ideal where the weld will be seen.

• MIG welding is faster and better for thicker aluminum and larger jobs where speed matters more than a flawless finish.

Stick welding is rarely the right call for aluminum. For most repair work, TIG gives the cleanest, strongest result, but the following factors also need to be taken into consideration:

• The job itself
• The metal thickness
• the location
• and the finish

Aluminum Repairs and Projects We Take On

If you've got an aluminum part that's cracked, bent, or broken, send a photo. We can save most of it.

Top 3 Reasons to Schedule Aluminum Welding Service in Chicago

Most aluminum welding calls come down to three reasons:

1. Repair costs far less than replacement.

A cracked aluminum trailer frame, boat hull, or railing can often be welded for a fraction of the price of buying new.

1. It saves equipment from being scrapped.

Boats, trailers, RVs, and machines that look "done" can usually be brought back into service with the right weld.

1. A professional weld holds where a quick fix fails.

Aluminum repaired properly stays repaired, no cracks reopening, no weak spot failing under load a month later.

When aluminum breaks, welding is almost always the faster and cheaper path back to working order.

Industries We Serve

• Boat owners, marinas, and boatyards
• Trailer owners and trailer dealers
• RV and camper owners
• Auto restoration and custom shops
• Homeowners and property managers
• Contractors and builders
• Manufacturers and fabrication shops

On-Site and In-Shop Aluminum Work

Most aluminum repairs can be done either on-site or at the shop, depending on the part. Small, portable items are often easiest to bring in. Larger or bolted-down pieces, such as trailer frames, railings, and boat fittings, are welded in place.

Most repairs are wrapped up in one visit. Custom fabrication is built in the shop and installed on-site, which usually takes two or three trips, depending on the size.

Service Areas We Cover

Based in DuPage County, our aluminum welding service runs across:

• Chicago and the surrounding city neighborhoods
• DuPage County — Naperville, Wheaton, Downers Grove, Lisle, Oak Brook, Hinsdale
• Cook, Will, Kane, Kendall, McHenry, and DeKalb Counties
• Larger projects across the wider Midwest

Aluminum Welding in Lisle, IL

Lisle has a steady mix of homes, boat owners near the river, and small commercial shops, all of which keep aluminum repair work coming. From cracked patio railings and aluminum gates to trailer frames and boat fittings, aluminum welding covers a wide range of local jobs.

Common Lisle aluminum jobs include trailer and boat repair, patio railing and furniture welding, gutter seam work, and custom aluminum fabrication.

Send a photo and a quick description; most quotes go out the same day.

Why Hire a Professional for Welding Services in Chicago, Illinois?

It's tempting to try a quick fix yourself or hand the job to whoever has an aluminum welder, even though that often ends up costing more in the end.

A professional welding service brings:

• The right equipment

Aluminum requires a properly set-up machine, not a basic steel welder.

• Experience reading the metal

Knowing the heat, the rod, and the prep for each job

• Welds that hold

A poor weld can crack, corrode, or fail under load.d

• Honest assessment

A pro will tell you straight if a part is worth repairing.

• One clear quote

Upfront pricing with no surprises

• Workmanship guaranteed

A failed weld isn't just wasted money; it can mean a boat taking on water or a trailer giving out on the road. Professional welding is what keeps the repair reliable.

Why can't every welder weld aluminum

Plenty of welders can join steel all day and still struggle with aluminum. It's a different skill, and it shows fast. A welder who works with aluminum regularly brings:

• The right process and filler rod for the specific grade of aluminum
• Heat control that prevents warping and burn-through
• Clean prep habits; aluminum-only tools, spotless surfaces
• The skill to judge the heat by feel and timing without the color warnings steel gives
• Experience with cast aluminum, the hardest aluminum to weld well
• Repairs that hold, not welds that crack a month later
• Workmanship guaranteed

When someone tells you an aluminum part can't be fixed, what they often mean is they can't fix it. That's not the same thing.

From Cracked to Like New — The Aluminum Repair Process

Every aluminum job moves through the same steps:

1. Call or text (630) 927-3030 (describe the part, send photos if possible)
2. Free consultation (confirm the aluminum can be welded and the best approach)
3. Site visit if needed for larger jobs or bolted-down pieces
4. Clear quote upfront pricing before any work starts
5. Surface prep (aluminum cleaned thoroughly right before welding)
6. The weld, TIG or MIG, matched to the metal and the job
7. Finish and inspection: joint cleaned up, checked, and shown to you
8. Workmanship guarantee

Most repairs are done in one visit. Custom fabrication is built in the shop and installed on-site.

Frequently Asked Questions

Can aluminum be welded?

Yes. Aluminum can be welded cleanly and with high strength using the right process, filler rod, and surface preparation. The belief that it "can't be welded" usually comes from a repair attempted without the right setup or experience.

What type of welding is best for aluminum?

TIG welding is best for thin aluminum, visible welds, and precision repairs. MIG welding is better for thicker aluminum and larger jobs where speed matters. The right choice depends on the thickness, location, and required finish.

How much does it cost to weld aluminum?

Aluminum welding costs a little more than steel because it takes more prep and skill. Small repairs usually start in the low hundreds; the project quotes larger fabrication. Every quote is upfront before work begins.

Can a cracked aluminum boat or hull be welded?

Yes. Cracked hulls, transoms, seams, and fittings can usually be welded back together at a fraction of the cost of replacement. Marine-grade aluminum welds well with the right preparation.

Can cast aluminum be welded?

Often, yes. Cast aluminum; engine parts, housings, and brackets are the trickiest type because it's porous and can hide contamination. With careful cleaning and the right approach, most cast aluminum can be repaired.

Is welded aluminum as strong as the original metal?

A properly welded aluminum joint is very strong. The area right around the weld can be slightly softer than the original metal, but for most repairs, that makes no practical difference. Proper technique keeps the joint reliable.

Do I need a special machine to weld aluminum?

Yes. Aluminum needs a welding machine that's set up specifically for it; a basic steel welder won't do the job. For one-off repairs, hiring an aluminum welder is usually cheaper than buying the right machine and learning to use it.

Can you weld aluminum to steel?

Aluminum and steel don't weld well with standard welding. There are workarounds, special connector pieces made to join the two metals, or bolting them together, and we can talk through the best option for your project.

Why is aluminum welding important?

Aluminum welding keeps boats, trailers, railings, and equipment strong and in service. A solid weld restores a damaged part to working condition and prevents a small crack from leading to a full failure.

What makes aluminum welding different from welding other metals?

Aluminum has an invisible oxide layer that melts at a much higher temperature than the metal beneath it, and it conducts heat away quickly. That means it needs special preparation, the right machine settings, and more skill than welding steel.

What are the risks of a poorly done aluminum weld?

A bad aluminum weld can leave weak spots, invite corrosion, and eventually fail under load. On a boat, trailer, or railing, that failure can be costly. Proper technique is what makes the repair reliable.

Which aluminum welding projects are most common?

The most common requests are gates, railings, boats, trailers, and automotive parts. Cracked frames, broken brackets, and split seams make up most repair calls.

How is the quality of an aluminum weld checked?

The weld is cleaned up, inspected closely, and checked for a solid, even joint before the job is finished. Proper cleaning, alignment, and the right process are what produce a strong, lasting result.