Carbon
The hardness of alloys is very different; alloys have generally a hardness higher than the pure metal.
Boron
The metal increases in hardness, a mechanical property. The process which transforms the metal hardness is called "quenching".
alloys are probably cheaper to make and stonger then an element or a simple metal. Alloys are easier to make. It is difficult to find a simple metal.
Copper is not an alloy. It is a pure metal element.
The element that is used in alloys to reinforce them is called Magnesium. It is a light gray metal and is very strong, hard, and very elastic.
metal is compressed by adding more, thus weight increase
Metals are a class of elements. A pure metal is an element. Some metals are alloys, which mean they have more than one metal or element in them. The metal bronze is made of two elements, the metal tin and the metal copper.
These are called alloys. Some alloys have a specific name such as steel.
The non metal is Carbon (C), the fifth element of the periodic table.
It is the periodic table of elements. There are no alloys in it.
Alloys have improved mechanical properties, hardness, resistance to corrosion, resistance to heating, stable crystalline structure etc. compared with pure metals.