Als de jonge onderzoekers wat verder kijken dan hun neus, zie je dat er veel legeringen mogelijk zijn met koper als basis. Maar ja, het is zo makkelijk om direct alle nieuwe dingen maar weer als marketingtruc te bestempelen.
Hier heb je kleine opsomming van wat koperlegeringen. Tellerium koper staat er ook tussen.
Copper
Copper is one of the most useful of the metals, and probably the one first used. It is found native and in a large number of ores. Its apparent plentifulness is only because it is easy to separate from its ores and is often a by-product from silver and other mining. Copper has a face-centered cubic crystal structure. It is yellowish red in color, tough, ductile, and malleable, gives a brilliant luster when polished, has a disagreeable taste and a peculiar odor. It melts at 1083C and boils at 2310C. Its specific gravity is 8.91, and weight 0.321 lb/in3. It is the best conductor of electricity next to silver, with a conductivity 97% that of silver. The coefficient of expansion is 0.000017 per degree Celsius. The tensile strength of cast copper ranges from 17,000 to 20,000 lb/in2 (117 to 137 MPa) with elongation 49 to 50%. Annealed wrought copper has strength of 32,000 lb/in2 (220 MPa) with elongation 56%, while cold-drawn copper has a tensile strength of 56,000 lb/in2 (386 MPa) with elongation 6%.
Busbar copper used in electrical devices has a tensile strength up to 40,000 lb/in2 (275 MPa). Copper does not have the ductility of brass for metalworking, but does not work-harden as rapidly as brass. Pure copper is difficult to cast, as the molten metal absorbs oxygen, forming oxides. Copper is used for electric conductors; for making brasses and bronzes; for sheathing, fittings, and, pipe; and for cast articles. Small amounts of copper are added to some steels to give corrosion resistance. Much of the copper marketed for commercial use as copper contains slight amounts of silicon or other hardener, but even as little as 0.40% arsenic or other impurity will reduce the electric conductivity drastically.
Copper is sold in three general grades: electrolytic, lake, and casting.
