Magnesium Suppliers & Machining in Amarillo, TX

Yes, but WE43 is a specialty alloy and not every shop stocks it or runs it routinely. WE43 is a magnesium-yttrium-rare-earth casting alloy chosen for elevated-temperature performance up to roughly 250 C, which is why it appears in aerospace gearbox housings and engine-adjacent castings near defense and rotorcraft programs. Machining WE43 follows the same fire-control discipline as other magnesium alloys — sharp tooling, no water-based coolant on fines, and Class D extinguishing media — but the material is more expensive and has longer procurement lead times than AZ31B or AZ91D. When sourcing in the Amarillo area, confirm the shop has actually run rare-earth magnesium before, ask for the casting source and heat traceability, and verify AS9100 or NADCAP coverage if the part feeds a defense program. Lead time on WE43 stock is the most common schedule risk, so lock material availability before finalizing the design.

Bulk magnesium parts are not a practical fire risk, but the fine chips, dust, and grinding fines generated during machining are flammable and burn at very high temperature once ignited. Shops that run magnesium regularly control this with sharp tooling to produce larger chips, controlled chip evacuation and storage, avoidance of water-based coolants that can react with hot fines to release hydrogen, and Class D dry-powder extinguishers staged at the machine. They keep magnesium fines segregated from steel and aluminum swarf and clean machines on a schedule. For Amarillo buyers, the practical test is simple: ask a prospective supplier to describe their chip-handling and fire procedures. A shop that runs magnesium often will answer specifically and without hesitation. One that hedges is probably quoting the job speculatively and may not have the controls in place, which is a real safety and quality concern.

AZ31B and AZ91D share an aluminum-zinc magnesium base but serve different processes. AZ31B is a wrought alloy with about 3 percent aluminum and 1 percent zinc, supplied as sheet, plate, and extrusion. It forms and bends well in the annealed condition, machines cleanly, and welds readily, so Amarillo fabrication shops use it for brackets, enclosures, and formed panels. AZ91D is a die-casting alloy with roughly 9 percent aluminum, giving higher strength and excellent castability, with tightly controlled iron, nickel, and copper to preserve corrosion resistance. It is the right choice for volume cast housings, covers, and cases rather than formed sheet parts. In short, choose AZ31B when you are forming or fabricating from wrought stock and AZ91D when you are casting net-shape parts. The decision usually follows the manufacturing method the part demands, not just the mechanical numbers.

Magnesium is anodic to nearly every other structural metal, so the dominant failure mode is galvanic corrosion where it contacts steel fasteners, aluminum mating parts, or dissimilar inserts. Protection works on two fronts. First, isolate the dissimilar metal contact using coated or compatible fasteners, sealing washers, and barrier coatings at the interface so the galvanic couple is broken. Second, protect the magnesium surface itself with chromate conversion coatings or anodize-type systems, often followed by primer and topcoat for parts exposed to the Panhandle's weather and dust. High-purity casting alloys like AZ91D already control the iron, nickel, and copper that accelerate corrosion, which helps. For defense and rotorcraft parts, the coating system is usually called out on the drawing, and any Amarillo supplier serving that work should be able to quote to that spec and document it. The interface design matters as much as the coating, so address both during the design phase.

The case for magnesium over aluminum comes down to two properties: weight and vibration damping. Magnesium is roughly 35 percent lighter than aluminum at 1.74 g/cm3 versus about 2.7, so for parts where mass directly limits performance — rotorcraft components, portable equipment, anything that has to be carried or flown — the weight savings is decisive. Magnesium also damps mechanical vibration far better than aluminum, which matters for housings and covers on heavy equipment that runs long duty cycles in Panhandle agriculture and oilfield service. The tradeoffs are cost, corrosion management, and machining fire controls, so it is not a free swap. Aluminum remains the better default when weight is not critical and the part sees a corrosive or marine environment without extensive coating. Amarillo buyers tend to reserve magnesium for cases where the lightweighting or damping payoff is measurable and worth the added handling discipline.