The iron pillar of Delhi is a structure 7.21 metres (23 feet 8 inches) high with a 41-centimetre (16 in) diameter that was constructed by Chandragupta II (reigned c. 375–415 CE), and now stands in the Qutb complex at Mehrauli in Delhi, India. It is famous for the rust-resistant composition of the metals used in its construction. The pillar weighs more than 6 tonnes and is thought to have been erected elsewhere, perhaps outside the Udayagiri Caves, and moved to its present location by Anangpal Tomar in 11th century.
The height of the pillar, from the top to the bottom of its base, is 7.21 m (23 ft 8 in), 1.12 m (3 ft 8 in) of which is below ground. Its bell pattern capital is 306 mm (12 in). It is estimated to weigh more than six tonnes (13,228 lb). The pillar has attracted the attention of archaeologists and materials scientists because of its high resistance to corrosion and has been called a "testimony to the high level of skill achieved by the ancient Indian iron smiths in the extraction and processing of iron". The corrosion resistance results from an even layer of crystalline iron(III) hydrogen phosphate hydrate forming on the high-phosphorus-content iron, which serves to protect it from the effects of the Delhi climate.
sanoop k s | May 28, 2018
It's amazing to see the Iron pillar standing tall proclaiming the glory of ancient Indian Metallurgy. Many myths surround the pillar and hence it's protected with a barrier to prevent direct access of visitors. The structure is a unique display.
Francois G | Mar 17, 2018
This is a piece of history. Transported to Delhi hundreds of years ago. It was built during the 3rd or 4th century. Made of one of the best iron in the world, it still baffles scientists. Th pillar simply doesn't rust. It contains Sanskrit engravings which differ from the known Sanskrit to date. It is located in a beautiful estate of ruins not far from Delhi center. Make the trip, it is worth it.
Apurbalal Senapati | May 31, 2018
Wonder of the world ... how the they made such a rust-free iron pillar on that time? ... The pillar was manufactured by the forge welding of pieces of wrought iron. In a report published in the journal Current Science, R. Balasubramaniam of the IIT Kanpur explains how the pillar's resistance to corrosion is due to a passive protective film at the iron-rust interface....
Himanshu Nariyaal | May 23, 2018
Historical pillar made by Chandragupta Vikramaditya because he founded Delhi. This is also known as Kirti Stambh. It was 7 metres high.
Sthita Prajna | Apr 30, 2018
Iron pillar was erected by king chandra in 4th century CE.... It is dedicated to Lord Vishnu...It is an example of advanced technology of ancient India...The more than two thousands year old iron pillar is still rust free...Amazing.
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