Many elements are naturally present in metals, which are most commonly found in the earth’s crust for minerals and ores chemical compounds. Metals characterized by the fact that it is opaque, and glossy surface. However, in reaction with oxygen, some metal surface is matt and has cut a metal, there has shiny, for example, copper reacting with oxygen. Metals characterized by that it is solid, but ductile material which can produce various articles which are adapted to industry and art. The main feature of the metal is conductivity, because they conduct electricity and heat.

Metal Classification:

  • Ferrous metals, e.g. iron and its alloys;
  • Non-ferrous metals, e.g. all metals and alloys, other than iron;
  • Precious metals, e.g. silver, gold, platinum and other platinum group metals;
  • Light metals, e.g. low-density metals;
  • Heavy metals, e.g. non-ferrous metals with a density higher than iron.

 

Titanium is lightweight (45% lighter than steel), shiny, strong (equivalent to steel, and twice stronger than aluminum) corrosion resistant silver-gray metallic color metal, which is used in lightweight, mechanically resistant alloys (mainly iron and aluminum) and there are very little conductive to heat and electricity. These properties make titanium resistant to the usual kinds of metal fatigue. Titanium is chemically stable and is oxidized only in 610°C and higher temperature, but its powder reacts with oxygen in room temperature already, and may even catch fire.

Steel is a strong, resilient, elastic and durable iron and carbon alloy, which contains up to 2% carbon and manganese, silicon, sulfur and phosphorus impurities.

Aluminium is colored, plastic, light weight, especially for electricity and heat conductive metal. This metal by metal extraction on earth is in first place and is one of the most important industrial raw materials.

Bronze is an alloy of copper, in which a key element is zinc. Zinc alloy strengthens and makes it more plastic, more resistant to abrasion, but less wiring for electricity and heat and less resistant to corrosion. Brass easily cast and deformed in 600-700°C temperature and is cured with cold deformation. In Lithuania this metal has been called a Lithuanian gold.

Copper is one of the first human use nuggets class metal, which has a reddish-brown color with thin greenish-bluish membrane on the surface, it is soft and malleable, a good conductor of heat and electricity. This metal is not very active and does not change in a dry air. In a high humidity air it encrusts with green basic copper carbonate coating. Copper melting point is 1083°C temperature, boiling point – 2,360°C.

Magnesium is highly flammable, lightweight and sturdy metal. Although the magnesium powder or its thin strips relatively is easy to inflame, but to get fire of larger pieces of magnesium is quite difficult.

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PA2200 - polyamide, nylon (white plastic)Ti6Al4V – titaniumMP1 – cobalt chromeABS – plasticPLA – plasticColored plasterHigh speed steal

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