Brass and bronze
For copper or some copper alloys coins the coating is hydrated copper carbonate.
Copper grades are divided into six families: coppers, dilute copper alloys, brasses, bronzes, copper-nickel alloys, and nickel-silver alloys. The grade depends on the composition.
Copper, bronze, alloys, nickel, silver, cobalt.
Owen William Ellis has written: 'Copper and copper alloys' -- subject(s): Copper, Copper alloys, Metallurgy
Saru Copper Alloy Semis Pvt. Ltd- Manufacturer and exporter of copper alloys, phosphor bronze alloys, tin bronze alloys, leaded bronze alloys, gun metal alloys, nickel alloys, copper alloy bars, drawn copper bars, copper alloy sheets, copper alloy rods, nickel alloy rods, nickel alloy bars, phosphor bronze alloys rods, phosphor bronze bars, phosphor bronze squares and many more.
The most weldable copper alloys are typically the copper-nickel alloys, specifically those in the 90/10 and 70/30 compositions, due to their good resistance to corrosion and excellent mechanical properties. Additionally, oxygen-free copper (C10100) is highly weldable because it has minimal impurities, allowing for strong, clean welds. Other weldable copper alloys include some brass alloys, particularly those with lower zinc content, as they also exhibit good weldability.
Examples: iron sulfide and some copper alloys.
David Ford McFarland has written: 'A preliminary study of the alloys of chromium, copper, and nickel' -- subject(s): Accessible book, Chromium alloys, Copper alloys, Nickel alloys
NONE copper is an element and contains only copper - alloys (mixtures of copper combined with other metals) such as brass (copper and zinc) and bronze (copper and tin) both look different and cause the alloys of copper to have different characteristics
Copper (as a metal or alloys) is safe.
copper and alloys of copper
Iridium can form alloys with copper.