Environmental Benefits-Grace bridge

The demolition of the Grace Bridge began in August 2005. It took approximately two years and required closing the shipping lane for half a day so tha the main span could be cut from the cantilever sections, on to a barge below and shipped to   mill as raw material.

Old_and_new_Cooper_River_Bridges_Charleston_SC

Of the steel used in the bridge, 18,970 tonnes was   resulting in a saving of 33,460 tonnes of CO2 that would have resulted from producing new steel from iron ore.

Most of the rest of the steel (aproximately 20,000 tonnes) was taken out to sea to form an artificial reef for marine life and to protect the shoreline at the mouth Cooper River.

worldsteel.org

http://www.insertec.biz/en/refractory-products/steel-foundry

The term steel serves commonly to refer, in metallurgical engineering, an alloy of iron with a quantity of carbon variable between 0.03% to 1,075% by weight of its composition, depending on the grade.

If the alloy has a concentration of greater than 2.0% carbon occur foundries which are much more fragile and it is not possible to forge them they should be molded, as opposed to the steel,

it must not be confused with iron steel, the main difference between the two is the percentage of carbon.

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