Effects Of Alloying Elements

In order to select the alloy steel that is best suited for given design, the effects of primary alloying elements must be taken into account. They are :

Nickel provides toughness, corrosion resistance, and deep hardening.

Chromium improves corrosion resistance, toughness and hardenability.

Manganese deoxidizes , contributes to strength and hardness, decreases the critical cooling rate.

Silicon deoxidizes promotes resistance to high temperature oxidation, raises the critical temperature for heat treatment, increases the susceptibility of steel to decarburization and graphitization.

Molybdenum promotes hardenability , increases tensile and creep strength at high temperature.

Vanadium deoxidizes and promotes fine-grained structure.

Copper increases resistance to corrosion and acts as strengthening agent.

Aluminum deoxidizes, promotes fine-grained structure, and aids nitriding.

Boron increases hardenability.

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Mechinopedia For Mechanical Engineers

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