Among the most important mechanical properties.
- It was originally made of copper and more tolerant and add small percentages of tin is about 4% increase hardness. If, however, increased the percentage of 4%, the resulting alloy becomes brittle and easily breakable and, if not Tldenha.
The ancient Egyptian knew how to overcome these problems, the thermal Baltlden. So it was bronze fittest of copper for the manufacture of cutting machines such as chisel, axes and knives in addition to weapons and fighting tools such as swords and daggers.
- The melting point of copper decreased by the addition of tin to him it is known that the melting point of copper 10 835 m in the melting point while the bronze alloy drops to 960 17:00 for Skibbe composed of 85% copper, approximately 15% of the tin. While the melting point of tin alone 2325 m in the. And possible replacement to the melting point of the alloy of tin, if I knew of curves showing the relationship between the installation of the alloy and the degree of fusion and call that curves as Turi
Molten bronze and more liquid than the molten copper.
The molten copper more viscous than the molten bronze.
Therefore it is easy to be formed where the bronze is easier in the casting process. These are the features that led to the transition to a bronze in the Egyptian statues as pure copper metal does not fit as a casting.
- Bronze does not shrink when converted from the case of fusion with a hard case, but on the contrary increase its size a little bit so it is the fittest of copper in casting operations because after sclerosis takes forms or on the template minute details while copper Bankmach and freeze leaves many of these details.
- Bronze gas is not absorbed is hot when it cools down and ask, where the presence of tin prevents the absorption of oxygen and other gases, which sets it apart from copper metal. Therefore, we find that the bronze statues considered to be free of gas bubbles, unlike copper statues.
