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The Incredible Rust-Resistant Iron Pillar of Delhi In the Qutb complex of Delhi stands one of the most curious metal objects in the world - the so called “Iron Pillar of Delhi”, which does not seem to rust, despite being over a thousand years old. The height of the pillar, from the top of its capital to the bottom of its base is 7.2 metres, of which 1.1 metre is underground. The base rests on a grid of iron bars soldered with lead into the upper layer of the dressed stone pavement. The pillar s lower diameter is 420 mm (17 in), and its upper diameter 306 mm (12.0 in). It is estimated to weigh more than six tons.”

Uttar pradeshNew delhiMount abuKodochadri hillPrithiviraj chauhanLal kotMuhammad ghoriIndian institute of technology kanpurAryan books internationalKing candraguptaQutb ud din aibakIron pillarCurrent scienceIndian instituteTechnology kanpurCorrosion resistant delhi iron