Magnesium Suppliers and Machining in Augusta, GA

The cybersecurity and signals work concentrated around Fort Eisenhower drives demand for housings and chassis that protect sensitive electronics without adding mass to portable kits. Magnesium AZ31B sheet, formed and welded, gives a rigid enclosure at roughly 1.77 g/cm3 density, far below aluminum's 2.70. For dismounted gear and antenna mounts, that weight savings compounds across a soldier's load. The Savannah River Site's instrumentation and shielding work also pulls magnesium into the picture where electromagnetic and thermal management matter. Cast components in AZ91D fill structural roles in equipment frames and brackets, while WE43 shows up in higher-temperature applications because its rare-earth content holds properties past 250 C where conventional magnesium alloys soften. Local procurement teams typically split sourcing by form: wrought AZ31B for anything formed or machined from plate and sheet, and die-cast AZ91D for net-shape volume parts. Getting that division right up front avoids respecifying mid-program.

AZ31B is the workhorse wrought grade, roughly 3% aluminum and 1% zinc, supplied as sheet, plate, and extrusion. It bends, deep-draws, and welds well, making it the default for formed enclosures and panels. Expect tensile strength around 260 MPa in the H24 temper, with good machinability if feeds and coolant are managed for fire risk. AZ91D is the dominant die-casting alloy, with about 9% aluminum and 1% zinc, prized for excellent castability and corrosion resistance in the high-purity 'D' designation. It produces thin-wall, complex housings at volume, which is exactly what electronics and handheld gear demand. Yield strength runs near 160 MPa as-cast. WE43 is the specialty grade, alloyed with yttrium and neodymium. It costs considerably more but retains strength and creep resistance at elevated temperature, so aerospace and missile components that see heat reach for it. WE43 also appears in bioresorbable medical applications, though that is outside Augusta's primary demand profile.

Magnesium machines fast and clean, often at higher cutting speeds than aluminum, but fine chips and dust are flammable. Augusta shops with CNC machining and welding-fabrication capability that handle magnesium maintain dry sand or Class D extinguishers at the machine, never water, and control chip accumulation rigorously. This is the single biggest gating factor when qualifying a local supplier. Welding is done with GTAW under inert gas using matching filler such as AZ61 or AZ92 for AZ31B and AZ91D respectively. Clean joint prep is essential because magnesium oxides interfere with fusion. WE43 welding requires the specialized rare-earth filler and tighter procedure control. For finishing, magnesium needs protective treatment. Chromate conversion coating or anodizing per MIL-DTL-5541 or MIL-A-3171 is standard for defense parts to prevent galvanic and atmospheric corrosion, especially in Georgia's humid climate.