How does carbon 14 dating work
How does carbon 14 dating work - Icq sexchat amateur
Steel is an alloy of iron and carbon and other elements.
In steel, small amounts of carbon, other elements, and inclusions within the iron act as hardening agents that prevent the movement of dislocations that are common in the crystal lattices of iron atoms.Too little carbon content leaves (pure) iron quite soft, ductile, and weak.Carbon contents higher than those of steel make a brittle alloy commonly called pig iron.Iron is commonly found in the Earth's crust in the form of an ore, usually an iron oxide, such as magnetite or hematite.Iron is extracted from iron ore by removing the oxygen through its combination with a preferred chemical partner such as carbon which is then lost to the atmosphere as carbon dioxide.Basically, steel is an iron-carbon alloy that does not undergo eutectic reaction.
In contrast, cast iron does undergo eutectic reaction.
Additional elements are also important in steel: phosphorus, sulfur, silicon, and traces of oxygen, nitrogen, and copper, that are most frequently considered undesirable.
Plain carbon-iron alloys with a higher than 2.1% carbon content are known as cast iron.
The carbon in typical steel alloys may contribute up to 2.14% of its weight.
Varying the amount of carbon and many other alloying elements, as well as controlling their chemical and physical makeup in the final steel (either as solute elements, or as precipitated phases), slows the movement of those dislocations that make pure iron ductile, and thus controls and enhances its qualities.
Modern steel is generally identified by various grades defined by assorted standards organizations.