Metal classification

Update:21 Sep 2018
Summary:

Ferrous metals: iron, chromium and manganese. Non-ferro […]

Ferrous metals: iron, chromium and manganese.

Non-ferrous metals: aluminum, magnesium, potassium, sodium, calcium, strontium, barium, copper, lead, zinc, tin, cobalt, nickel, antimony, mercury, cadmium, antimony, gold, silver, platinum, rhodium, iridium, palladium, iridium , Hey, hey, lithium, lanthanum, cerium, titanium, zirconium, vanadium, niobium, tantalum, tungsten, molybdenum, gallium, indium, lanthanum, cerium, lanthanum, cerium, lanthanum, cerium, lanthanum, cerium, lanthanum, cerium, lanthanum , Dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium, yttrium, thorium.

Common metals: such as iron, aluminum, copper, zinc, etc.

Rare metals: such as zirconium, hafnium, tantalum, niobium, etc.

Light metal: density less than 4500 kg / cubic meter, such as titanium, aluminum, magnesium, potassium, sodium, calcium, barium, strontium and so on.

Heavy metals: density greater than 4500 kg / cubic meter, such as copper, nickel, cobalt, lead, zinc, tin, antimony, bismuth, cadmium, mercury and so on.

Precious metals: The price is more expensive than common metals, and the abundance of the crust is low (also known as CLARKE value, a value indicating the average content of chemical elements in the earth's crust). It is difficult to purify, such as gold, silver and platinum group metals.

Metalloid elements: Properties are between metal and non-metal, such as silicon, selenium, tellurium, arsenic, boron, etc.

Rare metals: including rare light metals such as lithium, strontium, barium, etc.;

Rare refractory metals: such as zirconium, molybdenum, tungsten, etc.;

Rarely dispersed metals: such as gallium, indium, antimony, antimony, etc.;

Rare earth metals: such as lanthanum, cerium, lanthanide metals;

Radioactive metals: such as uranium and thorium in radium, thorium, thorium and actinides.

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