Magnesium Suppliers and Machining in Dallas, TX

It is entirely safe when a shop follows the right protocols, and it is genuinely dangerous when one does not, which is exactly why supplier selection matters more for magnesium than for almost any other metal. The hazard comes from fine chips and dust, which have enough surface area to ignite; solid stock and large chips are far less of a concern. A shop that machines magnesium routinely controls this with deliberate practice: they use dry machining or a mineral-oil-based coolant instead of water-based fluid, because water reacts with burning magnesium and makes a fire worse. They remove chips frequently so fines never pile up, keep magnesium swarf segregated from other metals, and have Class D fire extinguishing media staged at the machine. They also avoid dull tooling and rubbing, since friction heat is what starts trouble. The takeaway for a buyer is not to fear magnesium but to insist on a supplier with documented experience. Ask how often they run it and how they handle chips and coolant; a real magnesium shop answers immediately because the protocols are simply part of how their floor operates. A shop that has never machined magnesium should not be learning on your parts.

The choice follows your process and your service temperature. AZ31B is a wrought alloy supplied as sheet, plate, and extrusion, and it is the right pick for parts made by machining, forming, or fabrication where you need moderate strength and good formability, such as panels, brackets, and enclosures. AZ91D is a die-casting alloy with high aluminum content that gives good castability and reasonable strength, making it the standard choice for housings and covers produced in volume by die casting; you would not machine a part from AZ91D bar, you would cast it. WE43 is the premium option, a rare-earth alloy that holds its strength and resists creep at elevated temperatures where the AZ grades soften, which is why it shows up in aerospace gearbox cases and engine-adjacent castings. It costs considerably more, so you specify it only when the temperature or strength requirement genuinely demands it. The practical rule is to match the grade to the manufacturing route first, wrought versus cast, and then to the thermal and strength environment. Always name the exact grade and temper on the print, because their properties, price, and processing differ enough that substitution is not safe.

Bare magnesium is chemically active and corrodes readily, particularly in humid or salt-laden environments and especially where it contacts dissimilar metals like steel or aluminum, which sets up galvanic corrosion that attacks the magnesium preferentially. Left unprotected, a magnesium part can degrade quickly enough to compromise the weight-saving and structural benefits that justified choosing it in the first place. That is why finishing is treated as part of the part, not an afterthought. Common protection includes chromate conversion coatings, anodize-style treatments governed by aerospace process specifications, and primer-and-topcoat paint systems, often layered together. Just as important, the design has to manage galvanic isolation at every joint with a dissimilar metal, using sealants, isolation washers, or compatible fasteners so the coating is not the only line of defense. For aerospace and defense work in Dallas, these finishes usually fall under controlled special processes that require a NADCAP-accredited source and traceable certifications back to the governing spec. When you quote a magnesium part, confirm the full finishing flowdown and the galvanic strategy, because the coating chain is a real cost and a real reliability driver, and a part that arrives bare or improperly isolated will not last in service.

For aerospace and defense magnesium in the Dallas-Fort Worth area, start with AS9100, the aerospace quality management standard, and verify the certificate and its scope in the OASIS database rather than taking a logo on a website at face value. Any special processes the part touches, and magnesium parts almost always involve special processes for chemical conversion coating, anodizing, or other finishing, should trace to a NADCAP-accredited source, so confirm that accreditation covers the specific processes on your print. If the work is tied to defense programs or controlled technical data, the supplier needs ITAR registration. ISO 9001 is the baseline quality system and is fine for commercial magnesium work, but it is not sufficient on its own for airframe parts. Beyond the certificates, ask about documentation practice: you want mill or foundry certs tying material to a heat or lot with full chemistry, certificates of conformance to the drawing revision, finishing certs for each special process, and for castings the nondestructive testing and first-article inspection a new part number requires. A supplier who can name these requirements and produce the paper without friction is set up for aerospace magnesium; one who cannot is a risk on parts where traceability and corrosion protection both matter.