What is added to steel to increase tensile strength?

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Multiple Choice

What is added to steel to increase tensile strength?

Adding small amounts of vanadium to steel increases tensile strength mainly through precipitation hardening and grain refinement. Vanadium forms stable vanadium carbides (VC) and carbonitrides that precipitate during heat treatment. These tiny particles pin grain boundaries and hinder grain growth, while also blocking dislocation movement. The combined effect is a stronger metal with higher yield and tensile strength, especially in microalloyed steels designed for high strength with good toughness and weldability. Other elements like chromium, molybdenum, and nickel influence strength in different ways, but vanadium’s key contribution to tensile strength comes from forming those fine precipitates and refining the grain structure.

Adding small amounts of vanadium to steel increases tensile strength mainly through precipitation hardening and grain refinement. Vanadium forms stable vanadium carbides (VC) and carbonitrides that precipitate during heat treatment. These tiny particles pin grain boundaries and hinder grain growth, while also blocking dislocation movement. The combined effect is a stronger metal with higher yield and tensile strength, especially in microalloyed steels designed for high strength with good toughness and weldability. Other elements like chromium, molybdenum, and nickel influence strength in different ways, but vanadium’s key contribution to tensile strength comes from forming those fine precipitates and refining the grain structure.

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