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Why different metal have different hardness.
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Hardness has nothing to do with stiffness. A steel part may have a high or low hardness, but it will always have the same stiffness. A titanium part may have the same hardness as a steel part, but it will always have about half the stiffness of steel. Hardness by itself also has nothing to do with whether a material is brittle or ductile. Of two materials with the same hardness, one might be brittle and the other ductile.
Shubhangi4:
In question there is metal not alloy
metals are made from alloy
examples steel is made from iron carbon and manganese
No, alloy are made up from metals
steel is alloy made up from metal manganese and non metal carbon
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