Carbon and Iron Ore melted and mixed together with limestone produce a substance known as steel. High carbon steel artifacts and weapons dating back as far as 400 BC have been found in various geographic locations such as India and Eastern Africa. During the 17th century in Europe, steel production hot rolled steel coil under went massive changes due to the industrial revolution causing huge steel consumption demands.

Some say the falling demand from China is due to its governmenta€?s order to reduce property speculation, thus leading to 40% of the steel factories closing down in their country. Experts are saying that Japan's cyclic trend in GDP is currently at a low, and this along with a downward trend in steel production and the unfortunate recent earthquake desaster, are the combined cause in the country's reduced consumption.However, this news should not threaten other producers of steel in the industry in general, because India is moving rapidly towards taking over China and Japana€?s position in the steel consumption market.

At first the most common way to produce steel was by combining charcoal, iron ore and lime using sufficient heat to liquidfy the three. The result of this is called Pig Iron, which has high levels of carbon and is hard and brittle. This was then heated again and beaten against an anvil with a hammer to remove the high levels of carbon until a stronger and more flexible product was produced, now known as mild steel. This was quite inefficient and time consuming.

These days, air is forced through the liquid iron under extreme preasure, causing the carbon to attach itself to the oxogen and thus be removed from the iron as it passes through.For centuries, steel has been at the core of manufacturing and construction industries and is still one of the fundamental materials used in modern building design today. The reasons for this are many, for instance the ability to be able to bend and shape steel to suite practically any imaginable requirements that modern architectural trends might demand, or that it can be constructed on site to form the solid framework needed to support the other great building necessity, concrete, means that it will continue to be an essential component of the building and construction industry for many more years to come.There is no question that the need for steel in modern buildings and structures continues to exist. However in todaya€?s market, the demand for color steel sheet steel in general, is said to be failing due to the lowering steel consumption of China and Japan.