Uses & Applications

Applications and End-Uses for Magnesium

Magnesium (Mg) is a high-criticality base metal with annual global production of approximately 1.1 million tonnes. Magnesium is the lightest structural metal, approximately one-third lighter than aluminum, making it highly valuable for lightweighting in automotive and aerospace applications. China produces roughly 85% of the world's magnesium, creating a severe supply concentration that has prompted multiple supply crises. It is also essential as an alloying element in aluminum and in steel desulfurization processes.

Key Applications

The primary end-uses of Magnesium span multiple sectors. The following applications represent the most significant sources of global demand:

• Aluminum alloy production - Key alternatives include Manganese, zinc, silicon (as alternative alloying elements). Magnesium is essential for certain aluminum alloy series (5xxx, 6xxx); no alternative provides the same strength and corrosion resistance improvements
• Automotive die casting - Key alternatives include Aluminum die casting, carbon fiber, engineering plastics. Magnesium is 33% lighter than aluminum but more expensive and harder to cast; aluminum dominates by volume; magnesium is preferred where maximum lightweighting justifies the cost premium
• Steel desulfurization - Key alternatives include Calcium carbide, calcium-silicon. Magnesium-based desulfurization agents are the most effective but calcium alternatives work for less demanding specifications
• Aerospace components - Magnesium is valued in aerospace components for its unique physical and chemical properties that are difficult to replicate with alternative materials.
• Refractory materials - Magnesium is valued in refractory materials for its unique physical and chemical properties that are difficult to replicate with alternative materials.

Product Forms and Specifications

Magnesium is commercially available in 4 primary product forms, each serving different industrial requirements:

Demand Outlook

Magnesium appears on both the USGS Critical Minerals List and the EU Critical Raw Materials List, underscoring its strategic importance across Western economies. Growing demand from electrification, digitalization, and defense modernization is expected to place additional pressure on the Magnesium supply chain through the end of this decade.