Weblmex.pk

Pakistan's first metal and chemicals pricing place

LCCI Radio

Live spot prices

  • Cotton (USD/lb.)
  • June 24,05:00
  • BID/ASK  
  • Change  
  • LOW/HIGH  
  • Silver (USD/t oz.)
  • June 24,05:00
  • BID/ASK  
  • Change  
  • LOW/HIGH  
  • Crude Oil (USD/bbl.)
  • June 24,05:00
  • BID/ASK  
  • Change  
  • LOW/HIGH  
  • Lead (US$/lb)
  • June 24,05:00
  • BID/ASK0.9992  1.0085
  • Change+0.0115  +1.17%
  • LOW/HIGH0.9793  1.0085
  • Zinc (US$/lb)
  • June 24,05:00
  • BID/ASK1.2232  1.2332
  • Change+0.0030  +0.25%
  • LOW/HIGH1.2097  1.2406
  • Aluminium (US$/lb)
  • June 24,05:00
  • BID/ASK0.8417  0.8467
  • Change-0.0028  -0.33%
  • LOW/HIGH0.8416  0.8502
  • Nickel (US$/lb)
  • June 24,05:00
  • BID/ASK4.1050  4.1708
  • Change+0.0333  +0.82%
  • LOW/HIGH4.0717  4.1715
  • Copper (US$/lb)
  • June 24,05:00
  • BID/ASK2.6191  2.6261
  • Change+0.0280  +1.08%
  • LOW/HIGH2.5829  2.6421
  • Gold (US$/t oz.)
  • June 24,05:00
  • BID/ASK  
  • Change  
  • LOW/HIGH  
CLASSIFICATIONS AND CHARACTERISTICS OF METALS
Written by Administrator   
Monday, 28 February 2011 06:50

Metals are natural elemental, chemical or mineral substances, each possessing a distinctive atomic structure. As compared to non-metal elements, metals are heavy, opaque and except for mercury, solid at ordinary temperatures.

When metals are mined from natural deposits, they sometimes are found in a native or pure state. More commonly, they occur as ores, which are crude, natural compound minerals containing several components, including one or more metals; the rest is non-metallic mineral waste matter. It is possible to separate these components through the controlled application of high heat. At certain temperatures, the metal will melt into a liquid state and separate from the other components.

Various pieces & Types of metals

This process can be refined and repeated to bring a specific metal down to its pure state. Pure metals posses specific physical constants which make their behavior, under certain conditions, predictable. Their properties include their atomic weight, specific gravity and melting point.

Most metals are ductile, malleable and plastic. Plastic, not referring to the common synthetic polymer based products, means the metals can be worked without rupture. The term malleable refers to a metal’s ability to accept deformation by hammering, rolling and extrusion. Ductile refers to a metal’s ability to be elongated without fracture, as in wire drawing. While most metals carry these characteristics, the degree of these qualities differ from metal to metal.

Metals are generally divided into two main categories. These are ferrous and non ferrous metals. Non ferrous includes the noble or precious metals and base metals. Ferrous metals refer to any metal containing iron.

The non ferrous metals can be subdivided into several groups. Foremost among them in terms of use in jewelry, are the noble or precious metals, a designation that distinguishes them from the base metals also in the non ferrous metals group. Noble metals include gold, silver, platinum, palladium, rhodium, iridium, osmium and ruthenium. These metals are known as “noble” not just because of their rarity, but also because they are highly stable chemically and resist oxidation and corrosion. Base non ferrous metals are so named because they are abundant and therefore not precious. This group consists of aluminum, copper, lead, mercury, nickel, tin, zinc and many others.

 
Banner
Banner