KAZ Minerals presents
Copper is one of the top seven metals known since the ancient time. Actually, humankind knows over 170 copper-containing minerals. Copper melts at 1,0830C. Copper and zinc alloy is known as brass. Copper and tin give us bronze, and alliance with nickel turns copper into melchior. Copper presents in Olympic medals of two values. Bronze medal contains about 97% of copper, and silver medal - about 7.5%. However, we need our copper mined and processed first.
28 мар 2017
