Aluminum Welding in Chicago & DuPage County

Aluminum Alloys and Welding Processes We Run

Aluminum is unforgiving. It oxidizes the second the surface is bare, conducts heat away from the weld pool fast, and switches from solid to molten with almost no warning. The wrong filler, the wrong gas, or the wrong prep — and the weld looks fine on the surface but cracks at the heat-affected zone weeks later.

Aluminum alloys we work with daily:

• 6061-T6 — structural, architectural rails, equipment frames, trailer beds. Strong, weldable, common.
• 5052 — sheet aluminum for trailers, marine, fuel tanks. Excellent corrosion resistance.
• 5083 / 5086 — marine-grade aluminum for boat repair, dock fittings, salt-environment work.
• 3003 — soft, formable sheet for ductwork and decorative work.
• Cast aluminum — engine housings, transmission cases, motorcycle and ATV parts (requires specialty rod and slow heat-up).

Welding processes we run on aluminum:

All welds performed to AWS D1.2 Structural Welding Code — Aluminum.

• TIG (GTAW) welding — primary process for structural, architectural, and finish-grade aluminum. Clean welds, narrow heat-affected zone, smooth bead that polishes flat.
• MIG (GMAW) welding — used on heavier sections (trailers, equipment frames) where weld speed and penetration matter more than finish flatness.
• Spool gun MIG — for thick-section production aluminum work where wire feed needs to be reliable.

Every aluminum weld is preceded by acetone wipe, stainless wire-brush prep, and shielded with the correct gas blend (100% argon for TIG, argon or argon-helium for MIG). The bead penetrates, doesn’t crater, and stays sound for the life of the part.

Aluminum Welding Customers We Serve

Aluminum work shows up across every kind of property and trade in Chicagoland. The job is always the same idea — clean weld on a metal that hates being welded badly — but the customer changes hour by hour:

• Trailer owners and fleet operators — broken aluminum trailer beds, side panels, ramps, cracked frames
• Boat owners and marine operators — aluminum hull repair, deck fittings, transom mounts, dock hardware
• Automotive shops and restorers — aluminum body panels, intake manifolds, transmission cases, oil pans, cast components
• Motorcycle, ATV, and powersports owners — cast aluminum case repairs, broken brackets, swing arm fixes
• Architects and contractors — aluminum railings, balcony rails, storefront fittings, structural aluminum
• Property managers — aluminum railings flagged in inspection, broken pool fence sections, gate hardware
• Industrial and warehouse facilities — aluminum equipment frames, conveyor parts, tooling
• HVAC contractors — aluminum ductwork repair and fabrication

Most aluminum repairs happen on-site. We bring the TIG, the rod, the gas, and the prep tools to your driveway, dock, garage, or shop floor.

Aluminum Welding Standards and Safety on Every Job

Aluminum welding has its own set of code and safety rules — and ignoring any of them either ruins the weld or hurts somebody. Every aluminum job we run follows:

• AWS D1.2 — Structural Welding Code, Aluminum — joint preparation, weld size, inspection criteria for structural aluminum
• AWS D1.6 / ASME IX — when applicable for sanitary, pressure, or food-grade aluminum
• OSHA welding & cutting standards — fume control (aluminum welding fumes are no joke), ventilation, fire watch
• ANSI Z49.1 — safety in welding, cutting, and allied processes

What that means on every aluminum call:

• Pre-weld surface prep — acetone wipe, stainless wire brush, no carbon-steel cross-contamination
• Correct shielding gas (100% argon for TIG, argon-blend for MIG) — never CO2 mix on aluminum
• Filler rod matched to base alloy (4043 for general, 5356 for marine and 5xxx-series base)
• Respirator or local exhaust when welding indoor or in tight spaces (aluminum fume contains fluorides and aluminum oxide)
• Fire watch and extinguisher within reach — aluminum doesn’t catch like steel does, but the surroundings still can
• Workmanship guarantee in writing

Why Chicago Trailer Owners, Boat Owners, and Contractors Pick American Welding for Aluminum

Aluminum welders are not interchangeable. The number of welders who can lay a clean TIG bead on 5083 marine plate or save a cracked cast aluminum case is much smaller than the number who can weld steel. Here’s what you get with American Welding:

• 37 years of aluminum experience — Pete has welded aluminum in every common process and on most common alloys
• TIG-quality welds — narrow heat-affected zone, clean fillet, full penetration
• Mobile or in-shop — most aluminum repairs happen at your trailer, your boat, your garage
• Cast aluminum specialty — broken motorcycle cases, transmission housings, engine blocks repaired (when others say “throw it away”)
• Marine-grade work — 5083 / 5086 alloys, inert gas, salt-environment-rated welds
• Architectural finish — railings and fittings finished to be polished or anodized later
• Owner-operated — the welder you talk to is the welder doing the work
• Workmanship guaranteed in writing

The goal on every aluminum job is simple: weld it once, weld it right, never see that crack again.

Frequently Asked Questions