🔩 ALUMINUM
Aluminum Suppliers & Machining in San Antonio, TX
Aluminum is the workhorse alloy of San Antonio's aerospace and defense base, where Boeing, Lockheed Martin, and the heavy-maintenance shops at Port San Antonio keep aircraft flying for multiple armed forces. Whether you need 7075-T73 forgings for structural rework or a few sheets of 5052 for an enclosure, this is what local sourcing looks like.
AS9100ISO 9001NADCAP
Why San Antonio Buys Aluminum
The demand profile here is unusual for a Texas metro because it is dominated by aircraft. Port San Antonio sits on the former Kelly Air Force Base footprint and now hosts Boeing's San Antonio site doing depot-level maintenance and modification on platforms like the C-17, KC-46, and various rotary-wing fleets, alongside StandardAero and other MRO operators. That work consumes aircraft aluminum constantly: replacement skins, longerons, brackets, fairings, and shop-fabricated tooling. When a shop pulls a corroded panel off a tanker, the replacement is almost always 2024-T3 clad sheet or 7075-T6 plate, and it needs to be on hand fast.
Layered on top of that is automotive. Toyota's Tundra and Sequoia plant on the south side, plus the Tier 1 suppliers clustered around it, drive demand for 6061 and 5052 in fixturing, brackets, conveyors, and aftermarket parts. The renewables and energy sector across the broader region adds enclosures, busbar backing, and structural framing. The result is a market where a single distributor's will-call counter might serve an aerospace machinist, a Toyota supplier, and a solar integrator in the same morning.
Grade Guide: 6061, 7075, 2024, 5052
6061-T6 is the default for general machined parts and structural fabrication. It welds cleanly with 4043 or 5356 filler, anodizes well, and holds tolerances around plus or minus 0.005 inch without drama on a properly tooled CNC. For most brackets, plates, and housings in San Antonio shops, 6061-T6 is the starting point.
7075-T73 trades some strength for stress-corrosion-cracking resistance, which is exactly why aerospace structural rework specifies it. The T73 temper is common on aircraft fittings and forgings that see sustained load in humid Gulf Coast conditions. 2024, usually as -T3 clad sheet, is the fatigue-resistant skin alloy on airframes; it does not weld well, so it is riveted, which keeps the local rivet and fastener supply chain busy. 5052-H32 is the marine and enclosure grade: excellent formability, good corrosion resistance, and the go-to for bent sheet-metal boxes, chassis, and guards. Knowing which of these four a job calls for is the difference between a part that passes inspection and one that gets scrapped.
Local Capabilities and Lead Times
San Antonio shops cover the full chain on aluminum: CNC machining, welding and fabrication, sheet-metal forming, and assembly. For machined parts, expect 3- and 5-axis milling capacity sized for aerospace brackets and housings, with finishes down to 32 microinch on critical surfaces. Sheet-metal shops run CNC press brakes and turret punches for 5052 and 6061 enclosures.
Lead times depend heavily on whether the grade is a stocked commodity. 6061 and 5052 in common bar, plate, and sheet sizes ship same-day or next-day from regional distribution. 7075-T73 plate and 2024 clad sheet in aerospace tempers may run a week or more if the exact thickness and certification package is not local, which is why MRO shops keep buffer stock. Material certifications matter here: AS9100 work requires full traceability, mill test reports, and often DFARS-compliant melt and pour for defense contracts.
Frequently Asked Questions
For structural rework on aircraft maintained at Port San Antonio and Joint Base San Antonio, the grade depends on the part's role. Skins and fatigue-loaded panels are typically 2024-T3 clad sheet, riveted rather than welded because 2024 has poor weldability. Structural fittings, forgings, and parts that see sustained load in the humid South Texas climate usually call for 7075-T73, whose overaged temper resists stress-corrosion cracking far better than -T6. Always match the OEM drawing or the depot's engineering disposition exactly, and confirm the temper, not just the alloy number. For AS9100 and DFARS-governed defense work, you also need full mill test reports and traceable, often domestic-melt, material. A local supplier who routinely serves the MRO cluster will have the certification package ready; a general distributor may not.
Yes. The local supplier base covers CNC machining, welding and fabrication, sheet-metal forming, and assembly, often under one roof for the aerospace and automotive customers here. For machined aluminum, shops run 3- and 5-axis mills and can hold typical tolerances of plus or minus 0.005 inch, tighter on critical features, with surface finishes down to 32 microinch. For welding, 6061 and 5052 join cleanly with 4043 or 5356 filler using TIG or MIG; 7075 and 2024 are generally not welded and are mechanically fastened instead. If your part needs both machining and welding, look for a shop with in-house certified welders and machining capacity so you avoid shipping work-in-process between vendors, which adds days and handling risk. ManufacturingBase lets you filter local suppliers by exactly these combined capabilities.
Lead time tracks closely with how common the grade and form are. 6061-T6 and 5052-H32 in standard bar, plate, and sheet sizes are stocked regionally and typically ship same-day or next-day, so fixturing, tooling, and general fabrication rarely wait on material. 7075-T73 plate and 2024-T3 clad sheet in aerospace tempers and thicknesses are less commonly stocked locally, and if your exact gauge plus a full certification package is not on the shelf, expect roughly one to two weeks. That is why the MRO shops around Port San Antonio carry buffer stock of flight-critical alloys. To compress lead times, confirm the exact thickness, temper, and cert requirements up front, and identify a backup supplier. Machining and fabrication time is separate and depends on part complexity and shop backlog.
It does. A large share of San Antonio's aerospace work supports military aircraft through Boeing, the depot operations, and the installations at Joint Base San Antonio. Defense contracts frequently invoke DFARS clauses requiring specialty metals, including aluminum, to be melted and produced in qualifying countries, with documented traceability from mill to finished part. AS9100 quality systems demand full material certs, mill test reports, and chain-of-custody records. Some work also carries ITAR controls, meaning the supplier and their data handling must be compliant. Practically, this means you cannot just buy the cheapest 7075 plate; you need a supplier who can deliver compliant, traceable material and who understands the documentation. Filter for AS9100 and ITAR-aware suppliers on ManufacturingBase to avoid sourcing material that gets rejected at incoming inspection.
For a bent sheet-metal enclosure, 5052-H32 is usually the better choice. It has superior formability, so tight bend radii on a press brake are far less likely to crack, and it offers strong corrosion resistance, which matters in South Texas humidity and any outdoor or marine-adjacent application. 5052 is the standard for chassis, boxes, guards, and panels. 6061 is stronger and better when the enclosure also needs to be machined, tapped, or load-bearing, but it is less forgiving on tight bends and can crack at small radii unless you form it in an annealed temper and re-heat-treat. Local sheet-metal shops stock both and run CNC press brakes and turret punches for either. If the part is primarily formed sheet, specify 5052; if it doubles as a structural or machined component, 6061 earns its place.
Last updated: July 2026
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