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Συνήθως σε ρολόγια έως 350 ευρώ οι κασες είναι brass, ανεβαίνοντας στην τιμή συναντάμε bronze κασες.
Brass is mainly an alloy that consists
of copper with zinc added. Brasses can have varying amounts of zinc or other elements added. These varying mixtures produce a wide range of properties and variation in color. Increased amounts of zinc provide the material with improved strength and ductility. Brass can range in
color from red to yellow depending on the amount of zinc added to the alloy.
Bronze is an alloy that consists primarily
of copper with the addition of other ingredients. In most cases the ingredient added is typically tin, but arsenic, phosphorus, aluminum, manganese, and silicon can also be used to produce different properties in the material. All of these ingredients produce an alloy much harder than copper alone.
Bronze is characterized by its
dull-gold color. You can also tell the difference between bronze and brass because bronze will have faint rings on its surface.