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Strength
When nickel is added to steel with low carbon content, the nickel strengthens the steel. Strong steel is ideal for weight-bearing construction, such as in building bridges.
Scratch Resistance
When steel is coated with nickel, or nickel plated, the nickel provides a scratch-resistant surface
Resistance to Heat
Nickel is heat resistant, and when combined with steel, it increases the heat resistance of that steel, making it ideal for rocket engines.
Resistance to Corrosion
Nickel is rust resistant, making it ideal for the production of stainless steel. The United States uses 42 percent of its nickel in stainless-steel products.
Density
When nickel is alloyed with steel, it increases the density and hardness of the material. Harder materials can be sharpened and remain sharpened, such as in the case of surgical equipment.