Classification of non-ferrous metals

Heavy metal

Generally, the density is above 4.5g/cm3, such as copper, lead, zinc, etc.;

Light metal

Low density (0.53 ~ 4.5g / cm3), chemically active, such as aluminum, magnesium and so on.

Precious metal

The content of the crust is small, the extraction is difficult, the price is high, the density is large, and the chemical properties are stable, such as gold, silver, platinum, etc.;

Rare metal

Such as tungsten, molybdenum, niobium, lithium, antimony, uranium and so on.

Non-ferrous metals refer to all metals except iron, chromium and manganese. In 1958, China included iron, chromium and manganese as ferrous metals; and 64 metals other than iron, chromium and manganese were included in non-ferrous metals. The 64 non-ferrous metals include: aluminum, magnesium, potassium, sodium, calcium, strontium, barium, copper, lead, zinc, tin, cobalt, nickel, strontium, mercury, cadmium, antimony, gold, silver, platinum, rhodium, iridium. , palladium, rhodium, iridium, ruthenium, lithium, osmium, iridium, titanium, zirconium, hafnium, vanadium, niobium, tantalum, tungsten, molybdenum, gallium, indium, lanthanum, cerium, lanthanum, cerium, lanthanum, cerium, lanthanum, cerium , é“•, é’†, é“½, é•, é’¬, é“’, é“¥, é•±, é•¥, é’ª, é’‡, silicon, boron, selenium, tellurium, arsenic, antimony.

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