An alloy of iron and tungsten used to create hard, heat-resistant steel for specialized industrial tools and applications.
From 'ferro-' (iron) + 'tungsten' (from Swedish tung sten, heavy stone). Tungsten's extreme hardness and high melting point made it valuable for alloys developed in the early 20th century.
Tungsten has the highest melting point of any element, and ferrotungsten steel can remain hard even at extremely high temperatures—that's why it's used in drill bits, saw blades, and tools that need to work in harsh conditions.
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