# Magnesium in Manufacturing
Magnesium is the lightest structural metal and the only material in this cluster whose machining carries a fire protocol. A shop without chip handling and a Class D extinguisher should not quote it.

# Magnesium in Manufacturing

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Magnesium is the lightest structural metal and the only material in this cluster whose machining carries a fire protocol. A shop without chip handling and a Class D extinguisher should not quote it.

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Magnesium is the one material here where the capability question is a safety question, and a supplier answering it plainly separates itself from most of the field. The programme argument is in [manufacturing SEO](/manufacturing-seo).

## The grades a drawing calls

**AZ31B is the wrought sheet and extrusion grade**, formable and weldable, used where a part is bent or fabricated rather than cut from solid.

**AZ91D is the die-casting grade** and the one most magnesium components are produced in at volume. **ZK60A and WE43 are the higher-performance wrought alloys**, the latter appearing in aerospace and medical work where creep resistance matters.

Magnesium is specified against [aluminum](/materials/aluminum) rather than against steel, and the decision is made on density rather than on cost: it is roughly a third lighter and considerably more expensive per part.

## What drives the quote

**Fine magnesium chips ignite**, and water intensifies a magnesium fire rather than extinguishing it. That makes chip handling, a Class D extinguishing medium, and dry or minimum-quantity machining the prerequisites rather than the precautions.

**A shop that machines magnesium has a written protocol for it**, and one that does not should decline the work. Stating the protocol plainly is a stronger capability claim than any tolerance figure on this material.

**Galvanic corrosion is the service failure.** Magnesium is anodic to almost every other structural metal, so a fastener or a mating part in steel corrodes it rapidly unless isolated.

**A conversion coating is therefore part of the specification** rather than a finish, and a part quoted without it is quoted incomplete.

## What a capability page should state

**A capability page must state process, materials, tolerances, capacity, certifications, and industries served**, and magnesium belongs there with the safety capability named.

State the alloys run, the chip handling and fire protocol, and whether conversion coating is performed or coordinated. Say whether magnesium is machined on dedicated equipment or alongside other metals, since chip mixing matters.

The structure is at [capability page structure](/content/capability-page-structure) and the cluster reasoning at [materials](/materials).

## Common questions

**Is magnesium machining actually dangerous?**

The risk is real and manageable with a protocol. The danger is a shop treating it as aluminium, which is the failure mode rather than the material.

**Why choose magnesium over aluminium?**

Density. It is roughly a third lighter, and it costs more per part and adds a corrosion requirement, so weight has to be worth paying for.

**Does magnesium need coating?**

Almost always, and the coating is part of the specification rather than a finishing option. Galvanic isolation from mating parts is the other half.

**Can a general job shop take magnesium work?**

With chip handling, the right extinguishing medium, and a written protocol, yes. Without them it should say so rather than quote.
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Source: https://manufacturingseo.ai/materials/magnesium/
Last reviewed: 2026-08-11
Author: ManufacturingSEO.ai